Question about 2002 GMC Envoy XL

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My high beams work and low beams dont had lights ckecked and they are good

The flood lights work and high beam work but low beams dont i had the low beam blubs tested and they are not burnt out . where should i start the trouble shooting at?

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I didn't read through all of these post so forgive me if you found your answer already. I have the same vehicle and had the same problem. Switch the headlamp relay with the cooling fan relay and see if they work. If so thats the problem.

Posted on Nov 04, 2013

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Firstly start at main on/off switch then main beam/dip switch failing that have a look at the lighting relays..Good-luck.....

Posted on Jan 05, 2013

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Posted on Jan 02, 2017

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SOURCE: 2004 Envoy, low beam headlights turn off on their own.

the daytime running light module is no good.,or the relay is overheating and cutting out and comes back on when cool.get some freeze spray from an electronic supplier and spray the suspect component when it stops working.the -60f will make it appear fast..cheers

Posted on Jun 14, 2009

AUTODOC01
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SOURCE: GMC truck light issue: My high beam / low beam

well as a tech i dont recomend it but all you got to do is swap the wires on the headlamps at the bulb you will see 3 wires one is a ground the other feeds low beam the other high beam . take a test light and find the one thats hot and cut it and connect it to the other blade , leave only one wire on the low beam terminal so you dont short it out .

Posted on Aug 27, 2009

Testimonial: "Great info many thx"

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SOURCE: LOW BEAM HEADLIGHTS DON'T WORK FUSES ARE GOOD AND

If you are handling the bulbs with your bare hands that is why your bulbs keep blowing out. use a washcloth to put the bulb in or rubber gloves, anything that will keep your hands from touching the bulb.

Posted on Oct 05, 2009

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SOURCE: Low Beam headlights don't work. High Beam work

hi from uk provided you have checked bulbs are ok? then this fault may be the relay for the low /dipped beam has gone faulty if you check h/book you may find location of low beam relay there is relay for high and one for low beams if you find both relays ? try switching? this will confirm relay fault if you then have low beam but no high ? b4 you buy new relay other than tis the other possible fault may be the actual di/high beam stick control ?

Posted on Nov 09, 2009

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SOURCE: Low beams don't work; High beams fine. Not the

some have fuse under hood for high beams & low beams,,if ok,,u mite need a high & low beam switch,,,,

Posted on May 24, 2010

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