From lights don't wrk when I hit the switch only my parking lights why is that

10

Asked by Jan 27, 2015 at 03:25 PM about the 2000 GMC Yukon Denali 4WD

Question type: Maintenance & Repair

I had a mechanic put a emission sensors so
he had to drop the gas tank after that my
front head lights stop working it sometimes
go off and on,high beam not working either.I
check the fuses,bulbs,relay,and the switch.

1 Answer

9,590

Both headlight bulbs have good filaments for either hi or lo? Do you lose your light function and then regain it ? like a circuit breaker cools and resets ? Does actuating between hi and lo seem to immediately affect them? There could be more than one cause and possibility if water entry perhaps. inspect the parts and their connectors. Substitute parts during testing to verify and isolate.

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