1991 GMC VAN
100,000 MILES
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ANONYMOUS
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Headlights including low and high beams dont work. What is the cause?
Jan 4, 2013 at 4:41 AM
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SATURNTECH9
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Have you checked the fuses? Also do you have a multi meter to do some testing?
Jan 4, 2013 at 4:45 AM
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CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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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.
Jan 4, 2013 at 4:45 AM