Question about 2003 Chevrolet TrailBlazer

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2003 trailblazer low beam headlights go out

I am having the same problem it just started within the last 6 months, sometime if I hit the brights they will come back on

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There is a relay in the under hood fuse box. It is a lighting relay and is the most common cause of this issue. Good Luck

Posted on Jun 22, 2009

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My low beam headlights will go off by themselves the brights will work but the low beams will not even come on manually


I would suggest that you check the relay for the headlights. If that doesnt work its possible that its the actual switch itself. It may also be a broken or loose wire. The relay is the simplest place to start.

Hope this helps...

Oct 14, 2009 | 2004 Chevrolet TrailBlazer

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2003 trailblazer low beam headlights go out


Check your dimmer switch on your steering column. Your plug may be loose or not getting a good connection. Your dimmer switch may be going bad as well. The same thing happened on my 1994 Chevy, but the lights never came back on, on mine. I found that the dimmer switch had gone bad. If this is the case, I recommend buying one from your local chevy dealer and spending the extra money. I went through two that I bought through napa before buying a OEM replacement because the napa ones just didn't last.

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