Question about 2004 Chevrolet TrailBlazer

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2004 chevy trailblazer low beam sensor

I have no low beams, is there a sensor or fuse to replace to make them come on again, highbeam are fine.

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  • jjgarcia50 Jan 14, 2009

    hi, i have the same problem, have you had any luck in repairing the problem? if you did please let me know what it is. all my light work, just not my low beems.

  • Mike Pierce Jan 14, 2009

    I have a Chevy trailblazer 04 my head lights wont come on. The last time this happen I removed the headlight relay and that reset the relay.

  • Kerrygmctm Jan 25, 2009

    Both bulbs were burned out it appeared. However upon replacing them they still will not work. Fuses and relays are ok. Any ideas?

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I just fixed my light problem tonight. you need to switch your relay #45 with #46 it will fix the light problem i am calling chevy in the morning to complain

Posted on Mar 02, 2009

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Did you switch them out with new Low beam bulbs?
you will have to pull off the round rubber that protects them turn the bulb counter clockwise to remove it do not touch the glass on the new bulb it will cause it to blow out again.

Posted on Jan 08, 2009

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1 Answer

Low beams on 2004 chevy trailblazer wont work but high beams work fine.lights all work automaticly


Try changing the bulbs. No. They didn't both burn out at once. You probably drove for a while with one headlight, and didn't know it.

Oct 26, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

2004 chevy trailblazer, Both low beam headlamps are out. Headlamps replaced(same problem). Fuses are good. High beams work fine.


There should be a relay for the low beams. Locate and replace, Or swap it with another relay to see if that fixes the problem.

Dec 27, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

No headlights come on but high beams work as well as the other lights the fuses seem to be ok. Please help.


If your highbeams are working fine, you must be referring to your low beams not working I would simply check the 2 bulbs and make sure the low beam filament is good, theres a strong possibility that your BOTH low beam filaments are bad and require replacement of both headlight bulbs to get them working again its a very simple repair.....

Dec 07, 2010 | 1990 Mazda Protege

1 Answer

I have a 05 chevy trailblazer the head lights wont come on i have running lights an highbeam just wont come on on lowbeam


Replace relay #46 in the fuse box. This is the relay for low beams. Or you could try cleaning the contacts first, which is what I did to fix this problem. I keep a new one in the glove box in case it ever really does go out. Very common problem for our TB's.

Nov 11, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 2005 Ford Freestar SE Minivan and cannot get high beam headlights to work. Have replaced bulbs, fuses are intact. When I switch to highbeams, the headlights go out completely. Low beams work...


AT FUSE TERMINAL #45 TO THE RIGHT OF THE HIGH BEAM RELAY AS YOU ARE LOOKING INTO THE ENGINE COMPARTMENT FROM THE FRONT OF THE VEHICLE. THERE IS A 15 AMP FUSE, PULL IT AND SEE IF IT IS BAD. IF IT IS REPLACE IT. THIS IS THE FUSE FOR THE HIGH BEAM RELAY.

Sep 14, 2010 | 2006 Ford Freestar

1 Answer

Highbeams work but low beams wil come on regardless of the settings. Chcked fuses and they are fine.


Check the relay #15016745 in the under hood fuse box. It is in position 46. There are actually two of them side by side, one for the low beams and one for the cooling fan. Swap the two relays and see if the headlights work, if so you have found the problem. Swap them back and purchase a replacement relay. The dealer should have them for around $45, other parts stores may have them or you may find them on ebay by searching for 15016745.

Feb 28, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Lowbeams don't work so I have to ride with highbeam


But the assumption is that both went out at the same time. I would say it is likely that one low beam went out, wasn't noticed, then the other low beam went out, which couldn't be missed.

I would say replace headlights/lamps.

May 27, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

2004 chevy trailblazer low beams not working fuses good bulbs new


Check the relay or your head light switch has gone bad. 

Apr 06, 2009 | 2004 Chevrolet TrailBlazer

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