Question about 2006 Chevrolet Trailblazer

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TrialBlazer 2006: My main headlight including fog lights not working (even on manual mode or auto mode) notes: - Hi headlights is OK - Lamps ,Fuses and related Relay is OK - No any power raching the headlight relay !!! any suggestion please?

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{: ) It seems you have done your homework well. I presume you are referring about the main power source of the relay coming from the battery. And that you dont have any trouble with the relay receiving the control signal commanded by your headlamp switch.
You can try these: Turn ignition off. On your underhood fuseblock, there is a 15amp fuse labeled HDM. Pull this out and make sure its not blown. If it is, replace with same amp rating and check again operation. Otherwise proceed with the next step.

Using your test lamp, probe on the exposed conductor on the fuse for voltage. The test lamp should light up whenever you probe on either side of the fuse, otherwise your fuseblock is in question. We can rule out the main wiring issue if the fuseblock is supplying power to all other circuits on your vehicle. Ihope you get lucky.

Posted on Jun 09, 2011

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File Save as so you can magnify it with the JPEG viewer you use.

sscullys_90.jpg

Close up of switch
sscullys_91.jpg

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