I would check pin 85 for power. If you have a volt meter, touch the pin 85 with the positive lead, and the negative lead to a known ground like the frame. If you are showing power, like 12 volts, then I would suspect the light switch in the cab to be the problem.
If you dont have a meter, most auto parts stores sell a light tester that will light up if 12 volts is applied. Touc the positive of the light meter to the pin, and the negative to a ground.
I know the older fords usta have problems with their light switch turning the lights off while you were driving, but I guess GM does the opposite. Lol
Tuesday, August 1st, 2006 AT 11:17 PM