The Truman Doctrine arose from a speech delivered by President Truman before a joint session of Congress on March 12, 1947.
Positive First. When installing a mower battery, always connect the positive cable first. The positive cable is red. It attaches to the battery terminal post marked with a plus sign, the letter P or the word POS. Attach the negative cable last. The negative cable is black.
1 Connecting the negative jumper cable first to the mower and then to the good battery can create a spark at the battery that could ignite flammable battery gas and cause an explosion. 2  Riding mowers use a 12-volt starting system. 3  Make sure the good battery you use for jump-starting also is 12 volts.