Question about 2003 Chevrolet TrailBlazer

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2003 chevy trailblazer, no headlights only highbeams. taillights work fine. bulbs are good and so are fuses. is there a relay or module i could check?

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The head lamp dimmer switch needs to be replaced

Posted on Jun 05, 2010

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Rf highbeam doesnt work,after new bulb install 02 monteSS


Check for 12VDC at the connector with your high beams on. Could be the wiring or the connector and no they run on the same fuse.

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Check the relay module. 45 or 46. on the engine relay block. you can swap the two they are the same part number, then you will know. Dont start the engine, just check the lights. If it works replace the relay module. You may have to order the part from the parts store. Or go to the dealer to get it.

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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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did you check the fuse's and or relays.

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Sounds like a Body Control Module issue, maybe best to take to the dealer to check for Technical Service bulletins and or an existing saftey campaign(Recall).

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