tail light schematic? - Chevy and GMC Duramax Diesel Forum
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post #1 of 5 (permalink) Old 07-24-2012, 08:10 PM Thread Starter
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tail light schematic?

Anyone know where i can find a schematic for the tail lamp? my tail light/ brake light was out last night, replaced the bulb but still no tail light, i used 2 different 3157's so i know its gotta be somethin electrical. Thanks!

2003 Silverado 2500HD
LB7 CCSB 4x4
4" MBRP Downpipe Back Exhaust
EFI Live by Bobo-Big Thanks to the guys at Creatures of the Night Performance!
K&N Air Filter, Resonator Delete, Air Box Mod,
Ported Intake Horn
285/75/16 BFG A/T's
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post #2 of 5 (permalink) Old 07-24-2012, 08:36 PM
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This is what Ive got from an 02. I hope it helps you.



post #3 of 5 (permalink) Old 07-24-2012, 09:12 PM
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did you check the fuses?
also check where the wires to the lights plug in under the box at the back of the frame.
there are seperate fuses for the tail and brake lights on the truck.either under the hood or in the side of the dash by the drivers door.

2006 gmc 3500 xcab lb, with the LBZ.
with air dog lift pump, race valve, egr delete, and efi reprogram, thanks to husker diesel.
84 gal fuel cap.34 main and a 50 gal aux transflo system.
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still stock. 4x4. 430,000 miles and counting.
transporting new units from factory to ia. dealers and ship.
engine replaced at 404,000 mi with one with 118,000 miles.
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post #4 of 5 (permalink) Old 07-25-2012, 05:00 PM Thread Starter
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well when i bought it, it had a cap on it and it looks like they spliced off the tail/brake lamp wire to run power to the third brake light on the cap and dome light in the cap so this should b fun, been pulled over twice for it already. FML

2003 Silverado 2500HD
LB7 CCSB 4x4
4" MBRP Downpipe Back Exhaust
EFI Live by Bobo-Big Thanks to the guys at Creatures of the Night Performance!
K&N Air Filter, Resonator Delete, Air Box Mod,
Ported Intake Horn
285/75/16 BFG A/T's
-Work In Progress-
03HDLB7 is offline  
post #5 of 5 (permalink) Old 07-25-2012, 05:06 PM Thread Starter
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oh ya and the brake light still lights up when i hit the pedal but no tail light when just the lights are on

2003 Silverado 2500HD
LB7 CCSB 4x4
4" MBRP Downpipe Back Exhaust
EFI Live by Bobo-Big Thanks to the guys at Creatures of the Night Performance!
K&N Air Filter, Resonator Delete, Air Box Mod,
Ported Intake Horn
285/75/16 BFG A/T's
-Work In Progress-
03HDLB7 is offline  
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