Current Opinion in Insect Science Volume 10 August 2015 Pages 4550 Death of the bee hive understanding the failure of an insect society Andrew B Barron httpsdoiorg101016jcois201504004 Get rights and content Highlights The average annual honey bee colony failure rate is 30 per annum in North America The frequencies and intensities of many chronic stressors of bees have increased Stressors interact to increase impacts pesticides can increase pathogen transmission Colonies are particularly susceptible to sublethal effects of stressors Colony functions can be catastrophically disrupted by sustained chronic stressors Since 2007 honey bee colony failure rates overwinter have averaged about 30 across much of North America In addition cases of extremely rapid colony failure have been reported which has been termed colony collapse disorder Both phenomena result from an increase in the frequency and intensity of chronic diseases and environmental stressors Colonies are often challenged by multiple stressors which can interact for example pesticides can enhance disease transmission in colonies Colonies may be particularly vulnerable to sublethal effects of pathogens and pesticides since colony functions are compromised whether a stressor kills workers or causes them to fail at foraging Current Opinion in Insect Science 2015 10 4550 This review comes from a themed issue on Social insects Edited by Christina M Grozinger and Jay D Evans For a complete overview see the and the Editorial Available online 28th April 2015 httpdxdoiorg101016jcois201504004 22145745 2015 Elsevier Inc All rights reserved Introduction Since 2007 the median annual honey bee colony loss rate in North America has been 296 range 22 in 2012 to 36 in 2008 1 2 Such high mortality rates are testing the ability of apiculturalists to maintain their bee stocks 1 3 4 This period has also seen dramatic reports of mass deaths of bee hives and cases of rapid colony depopulation with worker bees apparently disappearing from hives leaving just the queen brood and some food behind with no obvious cause of such a dramatic population collapse 5 This phenomenon termed colony collapse disorder CCD has galvanised research into why bee colonies are now failing at such high rates and what might cause CCD It is important to recognise that CCD is not the sole cause of the elevated honey bee colony failure rates 3 since in the majority of cases colony failures can be attributed to known stressors The near global spread of the parasitic mite Varroa destructor and its development of resistance to control measures has certainly driven up colony failure rates 3 6 7 but it is clear that neither CCD nor the general increase in incidences of colony failure can be attributed to any single cause Both issues are massively multicausal New research is examining how different stressors interact and synergise to impact bees and the importance of sublethal effects of stressors that can cause colony failure by compromising individual and or colony function Causes The list of pests parasites and environmental stressors that have been linked to CCD is enormous 8 There is now recognition that a stressor does not need to kill individual bees in order to contribute to colony failure Any factor that compromises bees abilities to forage effectively or otherwise service their colony can drive a colony into decline 9 10 This recognition has focussed attention on the social consequences of sublethal effects of stressors on bees There is a great deal of concern about the possible impacts of a wide range of pesticides on honey bees at sublethal doses 11 Here I pay particular attention to the neonicotinoid insecticides and organophosphate miticides on honey bees both are in common use in agriculture and apiculture the former as crop treatments to kill pest insects and the latter as inhive treatments to control Varroa mite Both target cholinergic neurotransmission in arthropods with potentially very wideranging effects on insect physiology and behaviour 12 Both classes of agrochemical can interfere with signalling in the mushroom bodies of the insect brain at sublethal and fieldrelevant doses 13 and impair learning and memory in honey bees 14 If neonicotinoids are damaging learning and memory and possibly navigation this may explain why sublethal neonicotinoid exposure reduces successful homing after foraging in bees 9 15 16 17 Building on a simple demographic model of a honey bee colony proposed by Khoury et al 18 Henry et al 9 proposed that the forager losses they observed as a consequence of sublethal pesticide exposure could potentially cause colony failure It now seems clear that sublethal neonicotinoid exposure can compromise colony function and may result in colony failure with symptoms resembling CCD 19 Similarly diseases do not need to kill individual bees to kill a bee hive if they sufficiently compromise colony function this can cause colony failure From the perspective of a colony maintaining its resource base and population it makes no difference if a pathogen kills worker bees out right or simply prevents them successfully returning home from foraging Both the gut parasite Nosema ceranae 20 and the Israeli Acute Paralysis Virus 21 22 reduce efficiency of foraging and increase the numbers of bees that fail to return to the hive from foraging trips Nosema infections can kill colonies 23 with features similar to that considered diagnostic of CCD 24 Stressors interact to compromise colony function In the current apicultural setting a honey bee colony is rarely dealing with a single stressor in isolation and stressors can interact in complex ways to alter worker physiology and colony function Treatment with fieldrelevant sublethal doses of the organophosphate miticide coumaphos and the neonicotinoid pesticide imidacloprid in combination had a greater impact on bees odour learning and odour discrimination than treatment with either compound alone 14 even though there was no evidence of synergy between the two pesticides in a mortality assay 14 Pesticides at sublethal doses can interact with complex and even unpredictable physiological effects that may not kill bees but could reduce their performance and survival in a foraging situation Field exposure of bees to a wide range of pesticides including fungicides sprayed on crops can also increase bees susceptibility to nosema infection which as described above can impair foraging performance 11 25 The impacts of pesticides on bees vary with environmental conditions Low temperatures and low protein diet both increased susceptibility of bees to nicotine poisoning 26 27 which may in part explain why the impacts of pesticides on bee colonies can vary seasonally Colonies experimentally chronically treated with sublethal doses of the neonicotinoid pesticides imidacloprid and clothianidin progressed normally through summer and autumn but failed to recommence brood rearing in late winter and hence failed just as control colonies were emerging from successful overwintering 19 These experimental colonies showed some features of CCD in that no dead adult bees were found in the colony Dively et al 28 however reported that effects of chronic imidacloprid exposure via pollen on overwintering survival of colonies were only seen at the higher end of the possible range of expected field contamination Bee diseases interact with each other and with season to intensify impacts on colonies 29 Heavy infestation during winter of either the varroa mite or deformed wing virus spread by the mite has been shown to be highly predictive of colony failure 30 Deformed wing virus and other opportunistic infections spread by varroa significantly weaken workers immune systems and energetic reserves which could seriously impair worker performance 30 Coinfections may act synergistically to weaken workers and increase transmission of diseases in the colony leading to colony failure with CCDlike symptoms 29 In this discussion I have focussed on stressors of workers but it should be noted that the loss of the queen is also a significant stressor for a colony and the demographic interruption as colonies replace a lost queen can significantly increase the risk of colony failure 31 Death of the colony A honey bee society usually contains within it autoregulatory mechanisms that operate to maintain the functions of the society against external stressors fully understanding colony failure will require understanding how these social systems have failed Much of the work in this area has involved modelling of colony demographic processes and this approach has proved useful for framing and exploring hypotheses of how a colony might react to stress Normally a bee hive contains a balanced division of labour Worker honey bees segregate tasks by age young adults specialise on brood rearing roles and older adults defend the hive and forage 32 33 34 This system enhances colony efficiency by delaying exposing workers to the highest risk tasks until after they have contributed to colony productivity 35 It is maintained by pheromonally mediated social inhibition whereby old foragers in the hive inhibit younger bees from becoming foragers 36 37 38 and in this way the colony maintains an appropriate balance of forager and hive bees If the hive loses its foragers however social inhibition is reduced and younger bees are recruited to the foraging force to replace them 36 37 38 Precocious foraging by young bees is a common response of individual bees to stressors individual or colony starvation 39 40 pollen deprivation 41 42 disease 11 24 35 43 44 45 and even wax deprivation 46 will all cause young bees to begin foraging precociously This is an adaptive response to an acute stressor since it rapidly replaces any losses of foragers and shifts the colony to increased resource accumulation but the reaction of bees to stress by foraging could be problematic in the face of a chronic stressor New data has shown that precocious foragers are markedly less effective than bees that begin foraging at the typical age of more than two weeks old 10 Precocious foragers survived less long as foragers completed fewer foraging trips and were less far more likely to die during their first few flights outside the hive than bees that commenced foraging at a typical age 10 Perry et al 10 constructed a simple compartment model of honey bee colony demography as a tool to explore how the reactions of individual bees to stressors precocious foraging and poor foraging performance might alter colony function Figure 1 18 47 The model assumed that the age at which bees commenced foraging was regulated by social inhibition and that foraging performance in terms of food collection and forager survival were both agedependent and declined as bees began foraging at younger ages Figure 1 The model was then used to examine the consequence of a colony suffering a chronic high rate of forager death as might occur if foragers were impacted by disease or pesticide and becoming lost while foraging Figure 2 ad Download fullsize image Figure 1 Schematic representation of key demographic processes operating in a honey bee colony considered as a compartment model by Perry et al 10 Workers develop as larvae pupate as capped brood emerge as adult hive bees and mature to foragers Existing foragers inhibit hive bees from becoming foragers by social inhibition 36 56 Blue lines represent consumption of food Food also influences brood numbers indirectly since in periods of low food influx workers will cannibalise larvae blue dotted line 57 Death rates during the transition from hive bee to forager forager death rate and the rate of food collection by foragers indicated by red arrows varied with the age at onset of foraging Source Figure adapted from Perry et al 10 with permission Download fullsize image Figure 2 Outputs of the model of honey bee demography shown in schematic in Figure 1 and described in full in 10 Responses of a colony to chronic stress shown as plots of populations of uncapped brood dotted line hive bees dashdot black line and foragers dashed line food solid line and age at onset of foraging dashed red line against time for increasing rates of forager bee mortality In these plots death rate is expressed as the ratio between death rate of the simulated hive and a healthy hive m r a Plot for a healthy hive m r 1 b m r 16 c m r 19 at this value the hive will collapse eventually but not when t 150 days d m r 20 twice the death rate of a healthy hive For this death rate the forager population reached zero at about t 99 days At about 3 weeks before collapse the colony in d had 8250 uncapped brood items 6780 hive bees and 1780 foragers suggesting a colony could decline from an apparently healthy size and strong brood production to zero foragers in less than three weeks The mathematics are such that modelling could not continue beyond the point of zero foragers Note that a and b are on a different vertical scale to c and d In the model chronically elevated forager death rates caused a shift in the proportions of forager bees hive bees and brood in the colony and Source Figure adapted from Perry et al 10 with permission In simulations if forager death rates were chronically raised above a threshold adult population decline was both rapid and markedly nonlinear Figure 2 Initially colonies buffered the consequences populations stabilised for a period and brood rearing continued Figure 2 d During this period however the foraging force became progressively younger and less effective until it could no longer sustain food levels in the colony which triggered a very rapid terminal decline in the adult population In the model the terminal phase saw a complete breakdown of division of labour with most bees becoming foragers and dying soon after leaving just the queen a few adult bees and abandoned brood in the colony It is notable that in this model colonies failed displaying several of the features of CCD 10 an abrupt change from apparent health with successful brood rearing to total loss of the adult population a decline in the average age of workers and in the ratio of nurse bees to brood in the colony and colony failure leaving few adult bees but a queen and brood in the colony Figure 2 If this model captures the demographics of a stressed bee colony then it may explain why colonies sometimes depopulate so rapidly and die The models of Perry et al 10 and Khoury et al 18 47 considered how a colony might respond to chronically elevated forager losses Betti et al 48 built on the Khoury model framework 18 47 to consider how a contagious bee disease might interact with the colonys demographic processes to damage colony function In their model highly transmittable diseases had a greater impact on colony function than diseases that were more lethal since the former persisted in colonies for longer and infected bees when younger 48 In their model colonies were most at risk of failure if infected before winter since the infected colonies were unable to effectively resume brood production in spring It is often observed that the winterspring transition is when colony failure is most likely to occur 2 5 49 and this may be a point of particular vulnerability for colonies since they are attempting rapid growth having all but exhausted their food reserves 50 Much of the challenge in understanding colony failure is that the interactions of stressors on individual bees with colony dynamics and environmental factors such as season and resource availability are complex dynamic and layered It is not easy to frame simple hypotheses for how best to intervene to improve colony health but here the new modelling approach of Becher et al 51 which considers colony performance and impact of disease in a landscape context could be a very powerful tool Models of honey bee colonies are important because they help clarify thinking of the demographic processes we imagine to operate within colonies and they propose hypotheses of how and why colonies might fail 51 Testing these hypotheses requires longterm studies of the changes in brood food adult population and foraging performance as colonies develop and decline Such studies are now possible thanks to new sensor technologies such as continuous weight monitoring 52 and RFID tracking of bees 10 53 54 55 A very promising future direction will be combing the capacity of these new technologies to generate highquality field data with new approaches to modelling honey bee hive performance 51 Modelling can help frame and explore hypotheses for how to improve colony performance and prevent colony failure New experiments then enable testing of these hypotheses and the provision of new field data to improve models Conclusions Honey bee colony failure rates have increased and in some circumstances colonies collapse rapidly and completely The ultimate explanation of both of these phenomena may simply be that far too many honey bee stressors environmental agrochemical parasitic and pathogenic have increased in frequency and intensity and honey bee colonies are too often dealing with too many chronic stressors A honey bee colony many be particularly vulnerable to sublethal effects of diseases and pathogens because colony functions are damaged to the same degree whether a stressor kills a worker outright or simply causes her to fail in her foraging effort Honey bee colonies have internal demographic processes to buffer against forager losses by recruiting young bees to the foraging force This may be an effective response to restore colony function in the face of acute stressors but modelling suggests it may accelerate colony failure and population collapse in the face of chronic stressors Experimental analyses of the demographic processes References and recommended reading Papers of particular interest published within the period of review have been highlighted as 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O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O

death of the bee hive
failure of an insect society
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Other Market Information Active Other Market Information Archive ScottishPower Assets Active ScottishPower Assets Archive West of Duddon Sands Active West of Duddon Sands Archive Hatfield Moor Active Hatfield Moor Archive Hatfield Moor Gas Flows Other Assets Active Other Assets Archive REMIT Standing Data REMIT Factsheet ScottishPower Remit Information At ScottishPower we believe that fair and transparent wholesale energy markets are in the best longterm interests of all stakeholders especially our customers We believe that its important that stakeholders can have confidence that wholesale energy markets are operating in a fair manner To this end its important that relevant information is published in a timely manner on activities which may impact market prices Detailed data regarding our generation activities and retail volumes is already centrally reported on behalf of market participants by Elexon and National Grid However in 2011 we started to publish more details regarding our generation and gas storage assets in order to further improve transparency The information below has been provided to comply with Article 4 of REGULATION EU No 12272011 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 25 October 2011 on wholesale energy market integrity and transparency REMIT and Article 172 of REGULATION EU No 5962014 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 16 April 2014 on Market Abuse RegulationMAR Other Market Information Other Market Information Active Other Market Information Archive ScottishPower Assets ScottishPower Assets Active ScottishPower Assets Archive West of Duddon Sands West of Duddon Sands Active West of Duddon Sands Archive Hatfield Moor Hatfield Moor Active Hatfield Moor Archive Hatfield Moor Gas Flows Other Assets Other Assets Active Other Assets Archive REMIT Standing Data Static Data Fact Sheet

O O O O O O O O B O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O B O O O O O O B I I O O O O O O O O O O O O O O O O O O O O O O O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O B O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O


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International

Body

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Wiring

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Jamison

Good

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diagrams

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MXT

RXT

Models

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Oct

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Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

GAUGES

WITH

AND

WITHOUT

INTEGRAL

WARNING

LIGHT

CHAPTER

IPGAUGE

LIST

P

Figure

IPGauge

List

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

WARNING

LIGHT

LIST

P

CHAPTER

WARNING

LIGHTS

LIST

IP

WARNING

LIGHTS

WARNING

LIGHT

TITLE

SIGNAL

PATH

SENSOR

LOCATION

RANGE

INHIBITED

FUEL

FILTER

ENGINE

ENGINE

YELLOW

LED

RED

LED

TRANS

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

ENGINE

CTRLRDRIVE

TRAIN

ENGINE

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

TRUCK

ABS

CTRLRDRIVE

TRAIN

TRANS

CTRLRDRIVE

TRAIN

TRLR

ABS

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

DISCRETE

NOT

ON

DATA

BUS

SYSTEM

CTRLRDRIVE

TRAIN

ENGINE

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

TRUCK

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

ENGINE

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

SYSTEM

CTRLRDRIVE

TRAIN

TRANS

CTRLRDRIVE

TRAIN

SYSTEM

BRAKE

PRESSURE

BRAKE

FLUID

TRAC

CTRL

CHECK

TRANS

TRAILER

ABS

WASHER

FLUID

LEFT

TURN

AIR

BAG

WATER

IN

FUEL

COOLANT

LEVEL

CHECK

ELECT

SYS

PARK

CRUISE

ABS

RIGHT

TURN

WAIT

TO

START

FASTEN

BELTS

HIGH

BEAM

IND

COLD

AMB

PROTEC

RETARD

OVERHEAT

CHECK

AC

AUTO

NEUTRAL

ALTERNATOR

PTOTHROTTLE

OPTIMIZED

IDLE

SNOW

VALVE

FR

AXLE

DIFF

LOCK

RR

AXLE

DIFF

LOCK

MESSAGE

WAIT

PTO

CONVERTER

TEMP

TOUCHLOC

RELEASE

PARK

FLUID

FR

AXLE

ENGAGED

P

CNA

ADDED

FR

AXLE

ENGAGED

B

CIRC

DIAGRAMS

Figure

Warning

Light

List

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

WARNING

LIGHTS

CONTROLLED

BY

ENGINE

TRANSMISSION

ABS

CONTROLLER

P

Figure

Warning

Lights

Controlled

by

Engine

Transmission

ABS

Controller

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ENGINE

OIL

PRESSURE

AND

TEMP

SPEEDOMETER

TACH

VOLTMETER

AND

WATER

TEMP

GAUGE

CIRCUITS

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

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INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

CHAPTER

ENG

OIL

PRESS

TEMP

SPEEDOMETER

TACH

VOLTMETER

WATER

TEMP

GAUGE

CIRCUITS

REFER

TO

CONSOLIDATED

ENGINEVEHICLE

CONTROLLER

DIAGNOSTICS

MANUAL

FOR

CIRCUIT

DIAGRAMS

SHOWING

INPUT

CIRCUITRY

FOR

THE

FOLLOWING

DATALINK

DRIVEN

SYSTEM

ENGINE

OIL

PRESSURE

GAUGE

ENGINE

OIL

TEMPERATURE

GAUGE

SPEEDOMETER

GAUGE

TACHOMETER

GAUGE

WATER

TEMPERATURE

GAUGE

CHK

DATE

CHANGE

PRODUCTION

RELEASE

REV

A

PEC

REFERENCE

DRAWN

RELEASE

NO

NAME

CIRC

DIAGRAMS

PART

NO

DATE

SHEET

Figure

Circuits

Engine

Oil

Pressure

and

Temp

Speedometer

Tach

Voltmeter

and

Water

Temp

Gauge

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

IPGAUGES

AND

WARNING

LIGHTS

GAUGE

CLUSTER

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

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PROVIDED

ON

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IN

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WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

IP

GAUGES

WARNING

LIGHTS

GAUGE

CLUSTER

W

MXT

GAUGE

CLUSTER

PANEL

LIGHT

DIMMER

SHIELD

SYSTEM

CONTROLLER

GROUND

HEADLIGHT

ENABLE

CAB

FUSE

BLOCK

DRIVETRAIN

DATA

LINK

CAB

FUSE

BLOCK

PANEL

LT

DIM

OP

GND

BATTERY

DRIVETRAIN

DRIVETRAIN

SYSTEM

GND

SW

IGN

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

F

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

IPGauges

and

Warning

Lights

Gauge

Cluster

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AIR

PRESSURE

INPUT

CIRCUIT

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

AIR

PRESSURE

INPUT

CIRCUIT

PRIMARY

SECONDARY

AIR

BRAKE

APPLICATION

GAUGE

WIRING

W

MXT

SYSTEM

CONTROLLER

CAB

DCM

A

B

C

PRIMARY

AIR

TRANSDUCER

ZERO

VOLT

REFERENCE

PRIMARY

AIR

SENSE

SECONDARY

AIR

SENSE

SECONDARY

AIR

TRANSDUCER

A

B

C

SWITCHED

SENSE

CMD

AIR

APPLICATION

TRANSDUCER

SYSTEM

CONTROLLER

PASS

THRU

A

B

C

AIR

BRAKE

APP

AIR

SYSTEM

PRESSURE

GAUGE

WIRING

W

HYD

BRAKES

SYSTEM

CONTROLLER

ELECTRONIC

REF

GROUND

SPLICE

PACK

LOGIC

GND

OUT

REF

SPLICE

PACK

FWD

CHASSIS

DASH

A

B

C

AUX

AIR

TRANSDUCER

SYSTEM

CONTROLLER

PASS

THRU

DCM

AUX

AIR

SENSE

W

MXT

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

D

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Air

Pressure

Input

Circuit

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AXLE

TEMPERATURE

FWD

REAR

AND

REAR

AXLES

GAUGE

INPUT

CIRCUIT

P

Figure

Axle

Temperature

FWD

Rear

and

Rear

Axles

Gauge

Input

Circuit

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

FUEL

GAUGE

INPUT

CIRCUIT

SINGLE

TANK

DIFFERENTIAL

LOCK

WARNING

LAMPS

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

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ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

FUEL

GAUGE

INPUT

CIRCUIT

SINGLE

TANK

DIFFERENTIAL

LOCK

WARNING

LAMPS

FUEL

GAUGE

INPUT

CIRCUIT

SINGLE

TANK

SYSTEM

CONTROLLER

FUEL

SENDER

SENSOR

RESISTANCE

FULL

TO

OHMS

EMPTY

TO

OHMS

ZERO

VOLT

REF

ZERO

VOLT

REF

SPLICE

ELECTRONIC

GROUND

SPLICE

DASH

CENTER

CHASSIS

FUEL

TANK

LOCATION

DEPENDENT

A

ZERO

VOLT

REF

SPLICE

C

B

W

MXT

A

RIGHT

GAUGE

FUEL

SENDER

B

A

LEFT

FUEL

SENSOR

B

DIFFERNTIAL

LOCK

WARNING

LAMPS

DASHCENTER

CHASSIS

CENTERREAR

CHASSIS

PASS

THRU

G

RR

AXLE

DIFF

LOCK

A

B

B

GND

CHASSIS

GND

SPLICE

PACK

B

E

D

A

WARNING

LIGHTS

F

REAR

AXLE

DIFF

LOCK

C

OPTIONAL

WARNING

LIGHT

ADAPTOR

CAB

FUSE

BLOCK

B

A

IGNITION

FEED

CAB

FUSE

BLOCK

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

G

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Fuel

Gauge

Input

Circuit

Single

Tank

Differential

Lock

Warning

Lamps

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

GAUGES

AND

WARNING

LIGHTS

FUEL

FILTER

HEATER

AND

WATER

IN

FUEL

LIGHTS

P

Figure

Gauges

and

Warning

Lights

Fuel

FilterHeater

and

Water

in

Fuel

Lights

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

GAUGES

AND

WARNING

LIGHTS

PARK

BRAKE

LIGHT

AND

TRANSMISSION

OIL

TEMP

GAUGE

P

Figure

Gauges

and

Warning

Lights

Park

Brake

Light

and

Transmission

Oil

Temp

Gauge

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

GAUGES

AND

WARNING

LIGHTS

AMMETER

P

Figure

Gauges

and

Warning

Lights

Ammeter

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ENGINE

OIL

TEMPERATURE

GAUGE

WITH

CATERPILLAR

P

Figure

Engine

Oil

Temperature

Gauge

With

Caterpillar

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

FRONT

AXLE

ENGAGEMENT

WARNING

LAMP

P

Figure

Front

Axle

Engagement

Warning

Lamp

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

LIGHTS

CHAPTER

BACKUP

LIGHTS

P

Figure

BackUp

Lights

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

LIGHT

SYSTEMS

CLEARANCE

MARKER

AND

PARK

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

LIGHT

SYSTEMS

CLEARANCE

MARKER

AND

PARK

NOTE

HEAD

LIGHT

SWITCH

IS

PART

OF

GAUGE

CLUSTER

SEE

CHAPTER

FOR

CLUSTER

WIRING

W

MXT

LEFT

FRONT

MARKER

TURN

LIGHT

RIGHT

FRONT

MARKER

TURN

LIGHT

LEFT

FENDER

TURN

LIGHT

RIGHT

FENDER

TURN

LIGHT

LEFT

GUIDE

POST

LIGHT

A

B

GROUND

ADAPTER

RIGHT

GUIDE

POST

LIGHT

A

B

POST

LIGHT

GROUND

ADAPTER

POST

LIGHT

BACKUP

LIGHT

TS

SPLICE

SYSTEM

CONTROLLER

FORWARD

CHASSIS

C

GND

H

B

C

SYSTEM

CONTROLLER

BACKUP

LIGHT

TS

SPLICE

COMBINATION

TS

LEFT

COMBINATION

TS

BACKUP

LIGHT

TS

SPLICE

RIGHT

TURN

BACKUP

LIGHT

TS

SPLICE

BACKUP

BACKUP

LIGHT

TS

SPLICE

BACKUP

BACKUP

LIGHT

TS

SPLICE

BACKUP

LIGHT

TS

SPLICE

BACKUP

COMBINATION

TS

RIGHT

B

CENTER

CHASSIS

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

F

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Light

Systems

Clearance

Marker

and

Park

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

LIGHT

SYSTEMS

CLEARANCE

MARKER

PARK

TAIL

TURN

AND

STOP

LAMPS

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

LIGHT

SYSTEMS

CLEARANCE

MARKER

PARK

TAIL

TURN

STOP

LAMPS

HEADLIGHT

SWITCH

IS

PART

OF

GAUGE

CLUSTER

SEE

CHAPTER

FOR

CLUSTER

WIRING

W

LIGHTED

MIRRORS

W

MXT

ELECT

SYSTEM

CONTROLLER

BOOSTER

CONN

H

CAB

GND

WSUNSHADE

ROOFIP

TO

RADIO

CONN

B

A

SUNSHADE

ROOFIP

ELECT

SYSTEM

CONTROLLER

H

CAB

GND

RADIO

CONN

ROOFIP

B

A

B

A

B

A

B

A

B

A

CLEARANCE

LIGHT

CLEARANCE

LIGHT

CLEARANCE

LIGHT

CLEARANCE

LIGHT

CLEARANCE

LIGHT

BA

BA

BA

BA

RIGHT

CLEARANCE

CHK

DATE

MID

RIGHT

MARKER

MIRKER

LEFT

MARKER

LEFT

CLEARANCE

DRAWN

NAME

CHANGE

BA

REV

REFERENCE

ADDED

MXT

EFFECTS

E

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Light

Systems

Clearance

Marker

Park

Tail

Turn

and

Stop

Lamps

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

LIGHT

SYSTEMS

TURN

SIGNAL

AND

STOP

SWITCHES

P

Figure

Light

Systems

Turn

Signal

and

Stop

Switches

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

DOME

LIGHT

MAP

LIGHT

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

DOME

LIGHT

MAP

LIGHT

GND

CAB

FUSE

BLOCK

SYSTEM

CONTROLLER

BOOSTER

CONN

C

GND

CAB

FUSE

BLOCK

SYSTEM

CONTROLLER

BOOSTER

CONN

C

GND

ROOF

CONSOLE

ROOF

DRIVERS

SIDE

CTSY

LIGHT

A

B

A

B

B

C

D

W

COURTESY

LIGHT

W

MXT

DOME

LAMP

ROOF

ROOF

B

A

C

ROOF

PASS

SIDE

CTSY

LIGHT

DOME

LIGHT

W

MXT

B

DOME

READING

LT

COMPASS

TEMP

B

C

A

REAR

DOME

LIGHT

REAR

DOME

B

LIGHT

C

A

C

D

B

REAR

DOME

LIGHT

C

D

CONSOLE

ROOF

CONSOLE

ROOF

B

C

F

REAR

DOME

LIGHT

TRAVEL

CREW

CAB

CONSOLEROOF

MAP

LIGHT

B

C

D

EXTENDED

CAB

CONSOLE

ROOF

CONSOLEROOF

B

C

D

B

C

B

DOME

LIGHT

W

PREMIUM

TRIM

A

C

DOME

LAMP

WSTD

TRIM

CB

REV

REFERENCE

DRAWN

NAME

B

C

F

DOMEREADING

COMPTEMP

WPREMIUM

TRIM

B

C

DOMEREADING

COMPTEMP

WPREM

TRIM

CB

CHK

DATE

CHANGE

ADDED

MXT

EFFECTS

D

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Dome

Light

Map

Light

MAP

LIGHT

D

F

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

DOME

LIGHT

MAP

LIGHT

CONT

P

Figure

Dome

Light

Map

Light

Cont

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

FOG

LIGHT

AND

WORK

LIGHT

P

Figure

Fog

Light

and

Work

Light

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

HEADLIGHTS

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

CHAPTER

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

HEADLIGHTS

DIMMER

LO

BEAM

HI

BEAM

ELECT

SYSTEM

CONTROLLER

BROWN

FTP

TURN

SIGNAL

SWITCH

G

D

GROUND

STUD

DCM

CONN

FWD

CHASSIS

DASH

DCM

CONN

GROUND

ADAPTER

GROUND

ADAPTER

A

C

B

A

C

B

HIGH

BEAM

LEFT

HEADLIGHT

TS

HARNESS

RT

HEADLIGHT

TS

HARNESS

NOTE

HEADLIGHTS

CONTROLLED

BY

SWITCH

ON

GAUGE

CLUSTER

THROUGH

DRIVETRAIN

DATA

LINK

AND

CLUSTER

HEADLIGHT

ENABLE

PIN

SEE

FOR

GAUGE

CLUSTER

WIRING

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

RD

NO

AND

C

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

FLASH

TO

PASS

ZERO

VOLT

REF

SYSTEM

CONTROLLER

DESCRIPTION

TO

CONN

Figure

Headlights

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AUX

HEADLIGHTS

AUX

PARK

AUX

TURN

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

AUX

HEADLIGHTS

AUX

PARK

AUX

TURN

RIGHT

FRONT

TS

LEFT

FRONT

TS

PARK

LIGHTS

HEADLIGHTSLOW

B

C

H

D

BACKUP

LIGHTS

TS

SPLICE

PACK

LEFT

BACKUP

LIGHTS

TS

SPLICE

PACK

RIGHT

HEADLIGHTSHI

SYSTEM

CONTROLLER

BROWN

G

SYSTEM

CONTROLLER

AUX

LOWBEAM

RELAY

AUX

HIBEAM

RELAY

CENTER

CHASSIS

CONN

GROUND

GROUND

FWD

CHASSIS

DASH

AUX

FWD

DASH

A

F

GROUND

ADAPTER

A

C

LEFT

HEADLIGHT

TURN

SIGNAL

B

D

E

GROUND

ADAPTER

E

A

C

B

RIGHT

HEADLIGHT

TURN

SIGNAL

D

SNOW

PLOW

CHK

DATE

CHANGE

REV

W

MXT

E

NAME

A

B

C

D

F

REFERENCE

DRAWN

ADDED

MXT

EFFECTS

E

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Aux

Headlights

Aux

Park

Aux

Turn

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

PANEL

LIGHTS

P

Figure

Panel

Lights

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

RXT

EXTERIOR

LIGHTING

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAMCHAPTER

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

RXT

EXTERIOR

LIGHTING

LICENSE

PLATE

LAMP

ID

LIGHT

BAR

LICENSE

PLATE

LAMP

FLARE

LAMP

FLARE

LAMP

FLARE

LAMP

FLARE

LAMP

TAILTURN

STOP

LAMP

TAILTURN

STOP

LAMP

BACKUP

LAMP

BACKUP

LAMP

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

UOOAXPC

RELEASE

NO

CIRC

DIAGRAMS

DATE

PART

NO

SHEET

Figure

RXT

Exterior

Lighting

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

TAIL

TURN

AND

STOP

LAMPS

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

LIGHT

SYSTEMS

TAIL

TURN

AND

STOP

LAMPS

W

MXT

B

C

B

C

REAR

CENTER

CHASSIS

RXT

MXT

EXTERIOR

LIGHTING

SCHEMATICS

B

D

E

A

C

STOP

TAIL

AND

TURN

C

B

E

A

RXT

MXT

EXTERIOR

LIGHTING

SCHEMATICS

C

B

E

A

LEFT

TAIL

LIGHT

RIGHT

TAIL

LIGHT

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

A

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Tail

Turn

and

Stop

Lamps

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

MXT

EXTERIOR

LIGHTING

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

MXT

EXTERIOR

LIGHING

RIGHT

RED

RIGHT

RED

RIGHT

WHITE

LICENSE

PLATE

RIGHT

MARKER

LIGHT

LICENSE

PLATE

MKR

LIGHT

POWER

A

B

C

F

LEFT

MARKER

LIGHT

E

D

STOP

TAIL

AND

TURN

MARKER

LIGHT

MARKER

LIGHT

MARKER

LIGHT

E

A

SPK

GROUND

F

E

D

A

BACK

UP

ALARM

C

W

MILITARY

W

CIVILIAN

LICENSE

PLATE

POWER

B

LEFT

RED

LEFT

RED

LEFT

WHITE

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

INITIAL

RELEASE

A

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

MXT

Exterior

Lighting

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

CHASSIS

ACCESSORIES

CHAPTER

AIR

DRYER

AND

HEATED

DRAIN

VALVE

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

CHAPTER

AIR

DRYER

AND

HEATED

DRAIN

VALVE

FROM

PRIMARY

IGNITION

RELAY

MINI

FUSE

BLOCKS

GND

DASHCENTER

CHASSIS

CHASSIS

GND

SPLICE

PACK

HEATED

DRAIN

VALVE

A

B

A

B

AIR

DRYER

note

CAVITY

A

CAVITY

B

note

CAVITY

A

CAVITY

B

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

PEC

CNA

PRODUCTION

RELEASE

WAS

A

B

RELEASE

NO

CIRC

DIAGRAMS

DATE

PART

NO

SHEET

Figure

Air

Dryer

and

Heated

Drain

Valve

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

ABS

AIR

P

Figure

Antilock

Brake

System

ABS

Air

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

ABS

AIR

TRACTION

CONTROL

P

Figure

Antilock

Brake

System

ABS

Air

Traction

Control

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

ABS

HYDRAULIC

P

CHAPTER

ANTILOCK

BRAKE

SYSTEM

ABS

HYDRAULIC

REAR

HARNESS

WABCO

HYD

ABS

ECU

GREEN

WABCO

HYD

ABS

ECU

GRAY

WABCO

HYD

ABS

ECU

BLACK

PUMP

ASSY

SEE

SEE

MODULATORS

SEE

SEE

A

B

A

GND

SEE

SEE

DASHCENTER

CHASSIS

C

B

A

D

E

CHASSISDASH

HYD

ABS

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

GND

FROM

PRIMARY

IGNITION

RELAY

MINI

FUSE

BLOCK

MEGAFUSE

JKP

REMOVED

CKT

C

CIRC

DIAGRAMS

Figure

Antilock

Brake

System

ABS

Hydraulic

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

ABS

HYDRAULIC

CONT

P

Figure

Antilock

Brake

System

ABS

Hydraulic

Cont

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

ABS

HYDRAULIC

CONT

P

CHAPTER

ANTILOCK

BRAKE

SYSTEM

ABS

HYDRAULIC

TO

ABS

ECU

SEE

ONLY

WITH

EXHAUST

BRAKE

OR

AUTOMATIC

TRANSMISSION

SEE

SEE

IGNITION

SPLICE

PACK

SEE

HYD

MODULATOR

RELAY

ABS

EVENT

RELAY

MINI

FUSE

BLOCK

ABS

WARN

LAMP

HYD

ABS

EVENT

SYSTEM

CONTROLLER

MEGAFUSE

GND

JKP

ADDED

CKT

D

CIRC

DIAGRAMS

Figure

Antilock

Brake

System

ABS

Hydraulic

Cont

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

TWO

SPEED

AXLE

SWITCH

WITH

MANUAL

TRANSMISSION

AND

HEUI

FUEL

HEATER

NWARN

LIGHTS

P

CHAPTER

TWO

SPEED

AXLE

SWITCH

WMANUAL

TRANSMISSION

AND

FUEL

HEATER

NWARNING

LIGHTS

ENGINES

SYSTEM

CONTROLLER

SPEED

AXLE

SWITCH

ZERO

VOLT

REF

XMSNDASH

CONN

C

A

C

ZERO

VOLT

REF

G

SPEED

AXLE

BOOT

CONN

ENGINES

SYSTEM

CONTROLLER

SPEED

AXLE

SWITCH

ZERO

VOLT

REF

XMSNDASH

CONN

C

A

C

G

ZERO

VOLT

REF

SPEED

AXLE

BOOT

CONN

MOUNTED

ON

ENGINE

GND

FUEL

HEATER

RELAY

MINIFUSE

BLOCK

MAXIFUSE

BLOCK

IGNITION

SPLICE

GND

A

C

FUEL

HEATER

FUEL

HEATER

A

C

CNA

ADDED

ENGINE

C

CIRC

DIAGRAMS

Figure

Two

Speed

Axle

Switch

With

Manual

Transmission

and

HEUI

Fuel

Heater

NWarn

Lights

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

BRAKE

SYSTEM

HYDRAULIC

P

Figure

Brake

System

Hydraulic

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

FUEL

TRANSFER

PUMP

P

Figure

Fuel

Transfer

Pump

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

BACK

OF

CAB

BODY

BUILDER

AND

TRAILER

STOP

TAIL

MARKER

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

BACK

OF

CAB

BODY

BUILDER

TRAILER

STOP

TAIL

MARKER

BODY

TRAILER

MARKER

TAIL

LAMP

RELAY

MINI

FUSE

BLOCK

C

B

LEFT

TURN

STOP

SYSTEM

CONTROLLER

TRAILER

SOCKET

TRAILER

SOCKET

FUSES

SYSTEM

CONTROLLER

BLUE

RIGHT

TURN

STOP

BACKUP

TS

SPLICE

MEGAFUSE

MINI

FUSE

BLOCK

BODY

ACCESSORY

RELAY

GND

STUD

MINI

FUSE

BLOCK

TRAILER

SOCKET

PASS

THRU

LEFT

TURN

SPLICE

PACK

WHEELCHAIR

LIFT

RELAY

ACCESSORY

RELAY

SYSTEM

COTROLLER

BROWN

C

B

RIGHT

TURN

SPLICE

PACK

BODY

AND

TRAILER

STOP

LAMPS

SYSTEM

COTROLLER

BODY

ONLY

MINI

FUSE

BLOCK

BODY

SOCKET

SOCKET

ONLY

W

MXT

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

MINI

FUSE

BLOCK

TRAILER

SOCKET

ADDED

MXT

EFFECTS

J

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Back

of

Cab

Body

Builder

and

Trailer

Stop

Tail

Marker

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

BACK

OF

CAB

BODY

BUILDER

AND

TRAILER

STOP

TAIL

MARKER

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

BACK

OF

CAB

BODY

BUILDER

TRAILER

STOPTAILMARKER

BB

CONNECTION

A

BB

CONNECTION

A

BB

TURN

STOP

A

B

C

D

B

B

C

D

C

EOF

D

E

F

G

E

E

F

G

F

G

BB

CONNECTION

E

B

A

C

BOC

D

F

W

MXT

G

BB

TURN

STOP

A

B

C

BB

TURN

STOP

A

B

BB

TURN

STOP

A

B

EOF

C

C

BB

TURN

STOP

A

B

BOC

C

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

A

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Back

of

Cab

Body

Builder

and

Trailer

Stop

Tail

Marker

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

BODY

BUILDER

AND

TRAILER

TURNS

CENTER

PIN

ABS

CENTER

PIN

AUX

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

BODY

BUILDER

AND

TRAILER

TURNSCENTER

PIN

ABS

CENTER

PIN

AUX

MINIFUSE

BLOCK

GND

TRAILER

AUX

CENTER

PIN

TRAILER

LEFT

TURN

W

STANDARD

TURNS

AMBER

SYSTEM

LEFT

TURN

CONTROLLER

SPLICE

PACK

BROWN

C

RIGHT

TURN

SPLICE

PACK

W

EOF

SOCKET

COMBO

TURN

STOP

RED

SYSTEM

LEFT

COMBO

CONTROLLER

TURN

STOP

BLUE

C

B

B

PASS

THRU

MINIFUSE

BLOCK

FROM

AUX

SWITCHES

MEGAFUSE

W

EATON

VORAD

TRAILER

RIGHT

TURN

RIGHT

COMBO

TURN

STOP

TRAILER

ABS

CENTER

PIN

CENTER

PIN

DIODE

IGNITION

SPLICE

PACK

W

MXT

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

J

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Body

Builder

and

Trailer

Turns

Center

Pin

ABS

Center

Pin

Aux

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

BODY

BUILDER

AND

TRAILER

SOCKET

BACK

OF

CAB

SOCKET

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

BODY

BUILDER

AND

TRAILER

SOCKET

BACK

OF

CAB

SOCKET

GREEN

ABS

TRAILER

SOCKET

A

TRAILER

SOCKET

RD

W

MXT

TRAILER

SOCKET

A

MINI

FUSE

BLOCK

B

B

BN

TRAILER

ABS

CENTRE

PIN

C

C

BL

MINI

FUSE

BLOCK

TRAILER

LEFT

TURN

TRAILER

RIGHT

TURN

TRAILER

SOCKET

A

GREEN

ABS

TRAILER

SOCKET

A

BK

B

B

YL

C

C

GN

TRAILER

SOCKET

GROUND

FOC

TRAILER

SOCKET

A

B

C

TRAILER

SOCKET

A

B

C

GREEN

ABS

TRAILER

SOCKET

GND

GREEN

ABS

TRAILER

SOCKET

WH

TRAILER

SOCKET

RD

BN

BL

A

B

C

GREEN

ABS

TRAILER

SOCKET

A

B

C

BK

YL

GN

TRAILER

SOCKET

GND

GREEN

ABS

TRAILER

SOCKET

GND

BLACK

AUXTRAILER

SOCKET

BLACK

AUX

TRAILER

SOCKET

B

A

C

C

A

B

WH

TRAILER

SOCKET

RD

BN

GN

TRAILER

AUX

SOCKET

BK

YL

BL

BLACK

AUX

TRAILER

SOCKET

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

WH

ADDED

MXT

EFFECTS

F

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Body

Builder

and

Trailer

Socket

Back

of

Cab

Sockets

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

BODY

BUILDER

AND

TRAILER

SOCKET

END

OF

FRAME

EOF

SOCKET

AND

BODY

BUILDER

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

CHAPTER

BODY

BUILDER

AND

TRAILER

SOCKET

END

OF

FRAME

EOF

AND

BODY

BUILDER

TRAILER

SOCKET

TRAILER

SOCKET

RD

BN

BL

A

B

C

TRAILER

SOCKET

A

B

C

GREEN

ABS

TRAILER

SOCKET

A

B

C

TRAILER

SOCKET

RD

BN

BL

GREEN

ABS

TRAILER

SOCKET

A

B

C

TRAILER

SOCKET

BOC

EOF

GREEN

ABS

TRAILER

SOCKET

GREEN

ABS

TRAILER

SOCKET

GND

A

B

C

A

B

C

GREEN

ABS

TRAILER

SOCKET

A

B

C

BK

YL

GN

WH

BK

YL

GN

WH

TRAILER

GROUND

GREEN

ABS

TRAILER

SOCKET

GND

TRAILER

SOCKET

A

B

C

INLINE

TO

BODY

BUILDER

LIGHTING

E

F

A

INLINE

TO

POLLAK

RV

STYLE

TRAILER

SOCKET

TRAILER

SOCKET

GND

FOC

A

B

A

B

C

W

MXT

BRAKES

TAIL

LIGHTS

IGNITION

OR

ELECTRIC

BRAKE

C

TRAILER

SOCKET

TRAILER

SOCKET

TRAILER

SOCKET

A

B

C

CENTER

CHASSIS

GREEN

ABS

TRAILER

SOCKET

A

B

C

INLINE

TO

POLLAK

RV

STYLE

TRAILER

SOCKET

MARKER

LIGHTS

LT

TURN

RT

TURN

TRAILER

SOCKET

GROUND

REAR

CHASSIS

TRAILER

GROUND

TRAILER

SOCKET

GND

CHK

DATE

CHANGE

REV

REFERENCE

DRAWN

NAME

ADDED

MXT

EFFECTS

H

RELEASE

NO

CIRCUIT

DIAGRAM

DATE

PART

NO

SHEET

Figure

Body

Builder

and

Trailer

Socket

End

of

Frame

EOF

Socket

and

Body

Builder

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AIR

SOLENOID

PACK

P

Figure

Air

Solenoid

Pack

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

REMOTE

POWER

UNITS

SOLENOID

PACKS

REMOTE

ENGINE

SPEED

CONTROLLER

P

CHAPTER

REMOTE

POWER

UNITS

SOLENOID

PACKS

REMOTE

ENGINE

SPEED

CONTROLLER

MEGA

FUSE

STARTER

STUD

OR

BATTERY

BOX

STUD

MINI

FUSE

BLOCKS

FUSEABLE

LINKS

SYSTEM

CONTROLLER

BLUE

A

SYSTEM

CONTROLLER

FWD

REMOTE

POWER

UNIT

A

BODY

BUILDER

DATE

LINK

REMOTE

POWER

MODULE

OHM

TERMINATING

RESISTOR

IF

FWD

AND

REAR

PRESENT

FORWARD

OF

CAB

POWER

MODULE

CENTERREAR

RPM

POWER

REMOTE

POWER

MODULE

A

REMOTESOLENOID

POWER

UNIT

GND

RPM

POWER

AIR

SOLENOID

A

A

TERMINATING

RESISTOR

OHM

REMOTE

POWER

MODULE

UNDER

CAB

BACK

OF

CAB

END

OF

FRAME

IF

PRESENT

LOCATED

BOC

REMOTE

ENGINE

SPEED

CONTROLLER

PACK

NOTE

EACH

LOCATION

MAY

CONTAIN

MODULES

NOTE

MUST

HAVE

TERMINATING

RESISTOR

BLOCKCOVER

ON

LAST

MODULE

IN

CHAIN

INDIVIDUAL

WIRE

NAMES

WILL

VARY

AND

DEPEND

ON

NUMBER

OF

REMOTE

POWER

MODULES

PRESENT

PIN

PIN

PIN

PIN

PIN

PIN

N

x

YL

N

x

GN

N

x

S

SHIELD

CNA

SWAPPED

GN

AND

YL

E

CIRC

DIAGRAMS

Figure

Remote

Power

Units

Solenoid

Packs

Remote

Engine

Speed

Controller

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

CHASSIS

ACCESSORIES

P

Figure

Chassis

Accessories

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AIR

SUSPENSION

P

Figure

Air

Suspension

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AUX

TRAILER

ACC

CONTROLLED

P

Figure

Aux

Trailer

Acc

Controlled

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AUX

TRAILER

BTRY

CONTROLLED

P

Figure

Aux

Trailer

Btry

Controlled

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

LIFT

AXLES

NONSTEERABLE

P

Figure

Lift

Axles

NonSteerable

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

LIFT

AXLES

STEERABLE

P

Figure

Lift

Axles

NonSteerable

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

AIR

ACTUATED

PARK

BRAKE

P

Figure

Air

Actuated

Park

Brake

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

WABCO

AIR

P

CHAPTER

ANTILOCK

BRAKE

SYSTEM

ABS

WABCO

AIR

SYSTEM

CONTROLLER

AUTO

TRACT

CONTROL

ABS

ECU

POWER

GROUND

SUD

MINI

FUSE

BLOCK

B

WABCO

AIR

ABS

DASH

CONN

D

C

REAR

HARNESS

A

SEE

SEE

SEE

SEE

WABCO

ABS

ECU

BLACK

WABCO

ABS

ECU

GREEN

WABCO

ABS

ECU

GRAY

CENTER

CHASSIS

SEE

SEE

SEE

SEE

SEE

SEE

SPLICE

DASHCENTER

CHASSIS

A

C

TERMINATING

RESISTOR

C

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

A

TO

ENGINE

NOTE

AND

AND

ARE

TWISTED

TRIPLETS

CNA

CHANGED

FORMAT

B

CIRC

DIAGRAMS

Figure

Antilock

Brake

System

WABCO

Air

MXT

RXT

Models

Built

Oct

to

Feb

ELECTRICAL

CIRCUIT

DIAGRAMS

ANTILOCK

BRAKE

SYSTEM

WABCO

AIR

P

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

THIS

PRINT

IS

PROVIDED

ON

A

RESTRICTED

BASIS

AND

IS

NOT

TO

BE

USED

IN

ANY

WAY

DETRIMENTAL

TO

THE

INTEREST

OF

INTERNATIONAL

TRUCK

AND

ENGINE

CORPORATION

ELECTRICAL

CIRCUIT

DIAGRAM

CHAPTER

ANTILOCK

BRAKE

SYSTEM

ABS

WABCO

AIR

RIGHT

FRONT

WHEEL

SPEED

SENSOR

LEFT

FRONT

WHEEL

SPEED

SENSOR

LEFT

REAR

WHEEL

SPEED

SENSOR

RIGHT

REAR

WHEEL

SPEED

SENSOR

SEE

SEE

SEE

FWD

CHASSIS

DASH

SEE

SEE

SEE

SEE

SEE

RIGHT

FRONT

MODULATOR

VALVE

LEFT

FRONT

MODULATOR

VALVE

RIGHT

REAR

MODULATOR

VALVE

LEFT

REAR

MODULATOR

VALVE

FWD

CHASSIS

DASH

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

SEE

CHK

DATE

CHANGE

O O O O O O O B I O O O O O B I O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 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