No Bright Lights 2004 Chevy Trailblazer

isaac1943
Posts: 2
Joined: Mon Nov 05, 2012 4:35 pm

No Bright Lights 2004 Chevy Trailblazer

Unread post by isaac1943 » Mon Nov 05, 2012 5:36 pm

Problem: No High Beam Headlights.
I replaced bulbs,
checked small 10 amp fuses.
I switched the HDM black Relay with one next to it and I still have no Bright lights.
I will pay for an answer.
Prax Isaac Arcia

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ProTech
Posts: 651
Joined: Wed Oct 17, 2012 10:08 am

Re: No Bright Lights, 2004 Chev Trailblazer

Unread post by ProTech » Tue Nov 06, 2012 8:58 pm

Ok, you failed to check the proper relay when you switched the HDM relay with the one next to it. There is Headlamp-Hi Relay as well in the underhood fuse block in position #43, so try that one too. There is also a controlling fuse for the Headlamp-Hi Relay you may want to check as well. It is labed COILS and is fuse #14. I would bet either of those is your problem. Trailblazer Headlight Repair

If not, you might want to start by removing the bulbs again and checking the connectors and wiring that go to them. Very often, the terminals have burned up on the connector and the connector needs to be replaced. Since both hi beams are out, this may not be it, but is something to check. Other than that, the high beam dimmer switch can fail and cause this problem, as well as other Body Control Module issues. It's probably the relay or the fuse for that relay, so check those out first.

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isaac1943
Posts: 2
Joined: Mon Nov 05, 2012 4:35 pm

Re: No Bright Lights 2004 Chevy Trailblazer

Unread post by isaac1943 » Wed Nov 07, 2012 8:16 pm

Thank You so much. I sent a donation for your expert assistance.
Yes the Fuse Relay (if that's what it is called) in the #43 position did the trick. I hnow have bright headlights. I can see. Yaaaaaa. May God Bless you.
Prax Isaac Arcia
praxscapes.com :D

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ProTech
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Re: No Bright Lights 2004 Chevy Trailblazer

Unread post by ProTech » Wed Nov 07, 2012 9:03 pm

Glad to help, and thank you very much for the donation!
GM Dealer Technician For 18+ Years
In the automotive industry for 20+

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