My truck has been runnig and behaving great, until, suddenly out of the blue, exterior lighting issues. Brake lights work with headlight switch off but rear running lights light up with break pedal. I turn on the head lights and nothin in the rear of the truck lights up, not even break lights. Any ideas? Also, anyone got a wiring diagram for an 86?
The only thing I have done to it was add a banks turbo about two months befor the problem occured.

Mark,
Jacksonville Florida

 

See what this does for ya.

 

Thanks, Thats good stuff.