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Re: Head lamp doesn't work
It all depends. You need to trace it back to the fuse and switch. A switch is cheap, the harness that the switch plugs into is cheap but you have to pull one wire out at a time and replace them in the exact same slots. The fuses are cheap and wire is cheap. Whats not cheap is paying someone to track it down. So if you feal confident witn multimeter. Then its some what easy and very cheap to fix.
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There was a recall on this, see your local Chevrolet dealer....
NOV 01, 2004
2003 Chevrolet Trailblazer
ON CERTAIN SPORT UTILITY VEHICLES, VIBRATION AND HEAT MAY CAUSE THE TAIL LAMP/STOP LAMP BULB TO LOOSEN IN ITS SOCKET. IF THIS OCCURS, THE BULB MAY FLICKER AND EVENTUALLY BECOME INOPERATIVE.
AN INOPERATIVE BRAKE LAMP WILL NOT CONVEY THE DRIVER'S INTENTION OF STOPPING TO DRIVERS IN FOLLOWING VEHICLES, AND AN INOPERATIVE REAR TURN SIGNAL LAMP WILL NOT CONVEY THE DRIVER'S INTENTION TO TURN TO DRIVERS IN FOLLOWING VEHICLES. BOTH OF THESE FAILURES CAN INCREASE THE RISK OF A CRASH.
DEALERS WILL INSPECT THE TAIL LAMP/STOP LAMP ASSEMBLIES, AND IF NECESSARY, REPLACE THEM. THE RECALL BEGAN ON NOVEMBER 22, 2004. OWNERS SHOULD CONTACT CHEVROLET AT 1-800-630-2438, OLDSMOBILE AT 1-800-630-6537, BUICK AT 1-866-608-8080, OR GMC AT 1-866-996-9463.
Potential Units Affected:
GENERAL MOTORS CORP.
Read more: http://www.motortrend.com/cars/2003/chevrolet/trailblazer/recalls/#ixzz2jWJ1eDyR
I would start by trying another bulb. Even though the brake and tail light share the same bulb they actually are powering different filaments inside of the bulb so you can have a tail light filament that is working fine and illuminating properly but have a burned out brake light element that won't work at all...all inside the same bulb. Not uncommon at all to see this problem and these bulbs are pretty inexpensive.
The Trailblazers have a common problem with the printed circuit boards in the tail lamp housing.
Unplug the tail lamp housing at the wiring connector and test for power with a test light. ( With turn signals on) You may have an open circuit in the lamp housing circuit board. Good luck
You have to remove the holder clip for the grill, plus remove a few bolts holding the headlight assembly to pull the headlight away far enough to remove the bulb holder. You can try to squeeze your hand in there to get to it, but you'd have to have small small hands.
Head lights can be a pain at times but before jumping to conclusions... Have you taken the low beam bulbs out and checked the continuity on them...
The filaments could break and then make a short term contact causing your right lamp to come back on.
Check the bulbs with an ohms meter first before searching for more difficulties.