Question about 2004 Chevrolet TrailBlazer

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The brake lights and low beam head lights do not work

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Thanks for choosing FixYa and welcome. If they both went out at the same time, you need to check your wiring harness. Check the wires with a voltage meter and see which ones are not getting power. Check for loose connections and make sure all ground wires are grounded properly. The grounds will be black. If they didn't go out at the same time, as for the brake lights, you may have a bad brake switch. It is located above your brake pedal. As for the low beam lights, it may be your actual light switch that is broke. Always be sure to unplug your battery when working on electrical wires. Thanks for using FixYa and have a good night.

Posted on Mar 28, 2011

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Posted on Jan 02, 2017

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1 Answer

Left operating headlight not working


the switch supplies power to the relays that switch on the lights according to the position you have it at
so on high beam there will be 2 high beam lights working
on low beam there will be 2 low beam lights working
back to passing lights or flashing head lights , both beams will work so the switch is the last item to consider
Now with only one side beam not working it comes back to the ground on that light for that bulb
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2006 Chevy HHR low beams do not work in auto or on positions. However, low beams flash when locking/unlocking the car using the remote. Also, high beams, parking lights, and turn signals all work fine. All...


Your running lights which come on when you are in drive should be the ones flashing when you use the key FOB to lock or unlock vehicle not your head lights. Although unusual maybe both low beam head lights are burnt out or a bad ground, that the only thing that makes sense to me.

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2002 gmc safari head light won't work on low beam but will work on high beam


First check, is there more than one headlight bulb, if so, the low beam bulb has failed, needs replacing.

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I have aproblem with my Buick Allure both low beam stoped working.The high beam works OK. Checked the fuses and there OK can you help


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My truck is actually a '95 C1500 but I understand that they were the same model from 88-98. I have 2 problems - both electrical. On a recent trip, I lost both low beam headlights at the same time. ...


There could be a fuse for each low beam light either under the hood or under the dash. If not, then prob both low beams are bad.

If you have daytime run lights, the following may be of help.

There is a daytime running light module that controls both low beams and the daytime running lights. The low beam bulbs may be OK. The high beams will work fine as they are not controlled through the module.

It may be possible to disable the daytime run lights by cutting the yellow wire going into the module and then connecting it to ground. Tape off the other end.


This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

Mar 03, 2010 | 1998 Chevrolet C1500

1 Answer

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