2004 Chevrolet TrailBlazer Logo
Posted on Jan 08, 2009

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.

  • Anonymous 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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  • Posted on Mar 02, 2009
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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

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  • Posted on Jan 08, 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.

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Related Questions:

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2004 trailblazer headlights are not working in dim but bright lights work

Low beams don't work ??????? But high beams do ????? DRL - daytime running lamps ?

HDM relay # 46 low beam relay , under hood fuse box.
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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.
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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.
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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.....
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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.
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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.
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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.
1helpful
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2004 chevy trailblazer low beams not working fuses good bulbs new

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