The only thing on the truck that can destroy a generator is the output wire shorted to ground and the fuse blown.
Your wire colors have changed from what I'm familiar with but we can identify them by their voltages. The fat output wire must have full battery voltage all the time. One small wire must also have full battery voltage all the time. If it's missing, look for a blown fuse, typically a 15 amp. Another small wire should have about 2.0 volts with the ignition switch on. That circuit is working because the battery light is on. The last wire comes out of the generator and is plugged into it again. That one will have around 6.0 volts when the system is working, otherwise it will have 0 volts.
Start with those measurements and holler back with your findings.
Monday, February 7th, 2011 AT 7:56 PM