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The low beams on my 2002 gmc envoy do not work. All other lights work, including high beams. Is there a low beam relay?

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Posted on Jan 02, 2017

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SOURCE: 2003 GMC Envoy Low beam headlights will not work.

I would start by checking the headlight relay and headlight fuse.  You also may wanna check to make sure the bulbs aren't blown out.  If those parts check out to be fine and in working order, you may need to replace the turn signal assembly in the steering column.  This part controls the hi/low beams.  This may sound crazy but, when GM wired their older trucks, they wired the headlights to go from the battery, to the hi/low beam switch, then to the headlight switch (to the left of the steering wheel) then out to the light bulbs.  You can kind of test to see if this part is good by making a fist and (with your headlights on) gently hitting the plastic cover for your steering column that is right behind your actual steering wheel.  This could cause your headlights to flicker on and off.  It's not 100% guarenteed that this method will work, but it may.  
Any questions, just ask!

Posted on Feb 02, 2009

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ourhowse
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SOURCE: 2001 Toyota Corolla high beam lights are not

Your switch must be working since your indicator is telling you when the high beams are on, so my guess is that your bulbs are faulty. The high beam part. They probably burnt out one at a time, so you didn't notice until the second one went. Change your bulbs, and see if that solves it. If not, let me know.

Posted on Jul 23, 2009

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SOURCE: My low beam liht (driver side) does not work. High

There is a good chance that the bulb itself is burnt out.Most newer vehicles use fuses for the lights.Check your owners manual for fuse and relay locations.The fuse/relay covers should also be labeled.Your vehicle probably has more than one location for fuse(convenience centers) The locations should be in your owners manual.

Posted on Oct 17, 2009

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SOURCE: low beams don't work - both out at the same time.

DID YOU CHECK THE BULBS?

Posted on Nov 04, 2009

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SOURCE: Headlamps won't come on 2004 GMC Envoy...High

Check Relay #46 in underhood fuse panel.

Posted on Dec 19, 2010

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2 Answers

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


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

Jan 05, 2013 | 2002 GMC Envoy XL

1 Answer

GMC Envoy 2003 SLT only the parking lights and fog lights work. The low beam and high beam don't work. Please help


Well, the problem is that I dont know the reason, you should investigate. There could be issues with lamps (must get new) or electricity problems (must head to auto-service)

Jun 29, 2012 | 2003 GMC Envoy

1 Answer

2004 envoy xuv low beams dont work switched fuses 45 and 46 still nothing any ideas


Other possibilities are; the bulbs themselves, burnt or corroded bulb sockets, or a bad headlight selector switch.

Dec 11, 2011 | 2004 GMC Envoy

1 Answer

High beam works and low beam dont , checked fuses under hood there good , tried new switch stilll no low beam , is there a relay for low beam cant find one.


Why yes there is. It's #46 under the hood. Switch relay #45 with #46, do you now have lights? Either clean the contacts by pushing it in and out of the fuse box, or buy a new relay. Cleaning the relay worked for me, but I keep a spare just in case. Very common problem with Envoys and Trailblazers.

May 28, 2011 | 2004 GMC Envoy

1 Answer

2003 envoy low beams will not work.fuses good,bulbs good,replcd turn signal assembly,not fixed.no relay in fuse box for low beams.only high beam relay.


For the I6 engine there is a relay for low beams, it's relay # 46. Switch it with relay #45 (runs the fan, same model relay) and see if your lights now come on. These 2 relays are the only 2 black ones in there (part # 15016745). Also, try to clean the contacts very well on the fuse box and the relay. If not, you may have some frayed wiring in the harness.

By the way, the high beam relay is #43, the gray one next to the windshield wiper relay #42.frontfuses.jpg

Feb 20, 2011 | 2003 GMC Envoy

1 Answer

Not work my low beam lights but the market light and high lights works on 2004 Envoy


Common problem. Next time your low beams don't work, switch relay #46 with relay #45. If you now have lights, replace the relay.

Dec 01, 2010 | 2005 GMC Envoy Xl

1 Answer

Headlights went out. Replaced bulbs and switch and still lights don't work. Fog lights and high beams work? What else can work?


If high beams work and low beams do not, then it is probably the high/low relay. It is part number 15016745 and has four prongs. To test if your relay has gone bad locate the relay in your fuse box. There will be two of these relays located next to each other. One controls the low beam headlights and the other the cooling fan. Swap the relays and check your low beam headlights. If the low beams work you have a bad relay.

Sep 20, 2010 | 2006 GMC Envoy

1 Answer

Low beams stopped working but all other lights work


Need to have an electrical shop determine what is wrong.

It could be a fuse for the low beam headlamps that has blown,
or a relay has been overheated.

Check that the bulbs for the low beam aren't blown out, possibly
simultaneously.

Jul 08, 2010 | 2004 GMC Envoy

1 Answer

No headlights on both sides no low beams but the high beams work replced low beams lamps check all fuses and relays but have no lights


How did you check the relays? The most common reason for low beams to be out is Relay #46 in the underhood fuse panel.

Jul 05, 2010 | 2003 GMC Envoy

2 Answers

Low beams on 2002 trailblazer won't turn on?


something might be broken inside. Those things are very easy to break try playing with it

Jul 24, 2009 | 2004 GMC Envoy

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