1991 GMC Van Repair Question
Topics covered: Dimmer switch, Fuse, Headlights.
Mileage: 100,000 miles.
Mileage: 100,000 miles.
Asked on January 4, 2013
GMC Van Dimmer switch Problem
Headlights including low and high beams dont work. What is the cause?
Asked by (pending member)Answer
Replied on January 4, 2013
Have you checked the fuses? Also do you have a multi meter to do some testing?
Replied on January 4, 2013
That's what you pay mechanics to diagnose. The most likely cause is a defective head light switch, especially if the tail lights also don't work. The next suspect would be the dimmer switch. Check both connectors for blackened terminals or signs of melted plastic.