Dash 8-200
Situational Awareness
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition; General Declared Emergency
Aircraft
While at FL210 we had a few caution lights go off in the advisory panel; including the L AC GEN and L TRU. Also the cabin pressurization lights and the fuel tank/temp flickered up and down rapidly.  As the Pilot Flying; I called for the L AC GEN checklist and the Pilot Monitoring followed through with the procedures on the book. The checklist directed the L AC GEN to be turned off; this stopped the flickering of the gauges.  The engines gauges were normal the entire time.  As there was bad weather in the vicinity; we decided it was best to divert to the nearest airport.  An emergency was declared and we landed safely without any further due incident.
A DHC-8-200 advisory panel alerted L AC GEN and L TRU so the checklist was completed which included selecting the L GEN OFF. Then; because of weather conditions; an emergency was declared and the flight diverted to a nearby airport.