Question about 2006 Chevrolet Trailblazer

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Both dim headlights will not burn. brights work just fine. checked fuse and switched relays with no result. any other ideas??

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  • 6 Answers

Most headlights have two different bulbs: one for regular/dim and one for bright. It's time to replace your headlights.

Posted on Oct 28, 2012


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Posted on Jan 02, 2017

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SOURCE: 2004 Cavalier Day/dim lights not working

I finally got mine fixed!! It was the crossover wires between headlights(the wires that run in front of the radiator). One wire was torn into. Spliced them and taped back together. Hope this works for you!! I also used something called wire caps that help hold the spliced wires together. I found this solution on search engine where someone else had suggested this. My only problem was no dim lights, but all the other lights worked fine.

Posted on May 11, 2009

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SOURCE: The drivers right side head lite is dim on normal

Follow the ground wire ( black to the raditor suport and reconnect it or add aground wire from it to the battery ground and it'll work good. Bet it goes out if you unplug the other headlightas it's grounding thought the other light.

Posted on Oct 01, 2010

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SOURCE: Left headlight is dim - like it has a bad ground.

i think you hit the nail on the head with the ground problem,if you remove the bulb from the head light assembly,wiggle the black wire to see if the bulb gets brighter,if it does remove the bulb and clean and tighten the ground wire end.if it does not get brighter from a wiggle,connect the ground end of a test light to the positive post of the battery and probe the black wire,test light should light,if so replace the light socket.

Posted on Nov 26, 2009

  • 186 Answers

SOURCE: Within the past month, both

Have you replaced the multi-function switch? It is common for it to stop hedlight funtion and allow other funtions to keep working.

Posted on Jul 19, 2009

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SOURCE: 1996 chevy k1500 350 vortec- can't get my

How did you check the bulbs? I might try replacing them

Posted on Jun 14, 2010

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My dim lights work on my 2001 expedition but my bright lights will not work why is that?

There is a relay (electronic switch) that controls the headlights. It is burned out. They are only about 7 dollars, mounted in the fuse box.

Apr 11, 2017 | Cars & Trucks

2 Answers

My headlights only work on bright.No dims on both sides.All fuses good

GM switched from having the headlight switch provide power to the lights to having it provide the ground. There are relays for high and low beam circuits. I would start checking that relay for power and ground, then the dimmer switch.

Feb 15, 2015 | 2006 Chevrolet Trailblazer

1 Answer

1995 jetta headlights work on bright but not on dim. Fuses are good

Had this once...Check voltage at plug on dim side to see if you have power.
If so, check continuity thru head light.
(I had both headlight low beams burn out at the same time once.)
Ya might check your headlight relays are seated for good connection as well.

Jul 16, 2011 | Volkswagen Jetta Cars & Trucks

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The headlights only work on Bright. The dim

If the low beam head light relay is fine,and the dimmer switch checks out fine,then look at the out put wire from the dimmer switch to the head light relay,check for voltage,then check the relay to see if it energizes.Then follow the wire(out put)from the relay to the head light.Now if power from the dimmer is getting to the relay,but the relay is not energizing,look for a bad relay,or bad relay ground wire.

Oct 30, 2009 | Buick LaCrosse Cars & Trucks

1 Answer

04 optima

I would definitely look into the switch at this point. Make sure there are no blown fuses in the relay as well. But most likely your switch is the problem.

Side note. The bulbs are still good in the car right. I have seen cases where both headlights burn out because of voltage surges caused by bad wiring etc. Also I have seen someone pull the headlight switch in a certain position so both the dim and brights were on (depending on car) and this caused both headlights to burn out.

Hope I could help

Sep 07, 2008 | 2004 Kia Optima

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