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Old 06-30-2013, 08:53 AM
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Brake light problem

OK, I am stumped. Having a problem with my brake light/turn signal on my 56 Chevy PU. I

rebuilt the truck and used an aftermarket wiring harness. I used 38-39 Ford LED brake light

assemblies, and it seemed OK for a while, however the left rear light went bad and I replaced it.

Now the left one is not working right again, same symptoms. The turn signal doesn't work, brake light

intermittent, and when I turn on the tail lights it is very bright, like the brake light it on. Right

one works fine. Had a mechanic check it out and he says the voltages are correct, ground

seems OK.
I would appreciate any help or suggestions.

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Old 06-30-2013, 10:11 AM
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The right LED tailight is probably bad. But why? Are the LED tailights connected per the manufacturers recommendation?
The symtoms you describe sound like a loose ground.
With LEDs I don't rely on the chassis for a ground. I run a ground wire just to be sure I have a good ground.
A single wire is adequate to ground all the tailights.
This is because the current draw of LEDs is very small and also the makeup of the LED fixure may not tolerate an increased resistance in the chassis connection point.

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