Tailight Trouble - Impala Tech
Electrical & Wiring Troubleshooting electrical problems

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post #1 of 3 (permalink) Old 12-05-2015, 07:31 PM Thread Starter
Join Date: Sep 2010
Location: USA
Posts: 65
Tailight Trouble

I would appreciate some electrical advice in troubleshooting what must be some kind of short in my rear tail lights on my '63 Impala. This is the problem: While ignition is on (engine running) and all lights are on, (front and rear) when I switch on the left turn signal the right side tail lights go out. As soon as the left signal is switched off they come back on. This does not happen in reverse order, however. When using the right side signal all lights remain on. During daylight hours when all lights are off the signals work normally, front and rear.

Any suggestions on what I should check will be appreciated.
Hal is offline  
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post #2 of 3 (permalink) Old 12-05-2015, 08:09 PM
Join Date: Jan 2006
Posts: 12,381
Sounds like a classic grounding issue. Need to clean all connections and particularly the grounding of the lamp base, lamp socket the tail light fixture and the back half of the car which is probably isolated from the battery by a lack of grounding straps connecting the motor to the frame and chassis of the body.

To test this theory all you need is a 25 foot long piece of wire with a battery clamp attached to the negative battery terminal at one end and a probe or small alligator clip at the other to verify the part is grounded by simply touching it. If it miraculously starts working you know you have a bad ground somewhere in the wiring.

Big Dave
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post #3 of 3 (permalink) Old 12-06-2015, 06:37 PM Thread Starter
Join Date: Sep 2010
Location: USA
Posts: 65
Thanks, Big Dave. I'll give that a try and see what happens.
Hal is offline  
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