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1994 Chevrolet G20 Van brake/turn signal wiring problem


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Kindred Wolf
09-02-2003, 12:47 AM
Ok, just picked up this SWEET van at a UCD. It's an extremely beautiful conversion van and everything works except...

Right turn signal, front and back and the back brake light on the right side.

First let me say the running lights (tail lamps) in the back DO work on BOTH Sides.

Now I've probed the switch under the console. When I push the break on, it turns the probe on etc. There are four wires for the tail lamp:

1 green, spliced on red. (Left side has this as well and it works fine. I assume it's for the trailer package) that I've determined (from examining the left side) is the turn signal/brake light.

2 brown wires that are RIGHT next to eachother. I've determined these to be the tail lamps for the headlights.

Then I have a black one. I assume this is a ground. Now: Is the two brown wires that are right next to eachother just for the tail lamps, or is one of them live and one a ground wire? Is the black wire the ground ONLY for the turn signal/brake light?


Now I found an identical red wire underneath the console hooked to the brake switch. It works just fine. But when I go in the back it doesn't even get votage.

The LEFT side works entirely: Brakes, turn signals AND running lights.

Another important thing to note: when I turn on the right turn signal I get nothing. No indicators light up, and the front turn signal doesn't work.


I'm at a loss here... someone help me! :(

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