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Old October 22nd, 2021, 01:09 PM
James James is offline
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Join Date: Jun 2013
Location: Greer, SC
Truck: 1964 GMC 1500 2wd
Age: 69
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Default Re: Turn signal dilemma

Quote:
Originally Posted by AZKen View Post
You not say if tail lights work????? Possible Taillight socket(s) not grounding.
I agree with you AZKen. Forgue you have a grounding issue at the right rear light assembly.

The reason is, when the right turn signal is on its using the tail light circuit as a ground path to ground (through the right tail light over to the left tail light to ground). If you had tried it with the parking or head lights on you would not have any right turn signal. Or removing the left tail light bulb you would have no a right turn signal either. This is typical when there is two elements (brake and tail lights) in the bulb.

The cause could be a rusted right light socket, broken ground wire between the right socket and ground, a bad ground connection at the light socket, or a bad crimp terminal.

Solution: Use a Volt/Ohm meter and measure the resistance (with the right bulb removed) from the light socket (the side of the socket and not the two contacts in the back) to the ground on the body. The reading should be zero ohm (or very close to it like less than 1 ohm). And make sure your meter reads zero ohm when touching the leads together, don't want you to chase a non-existing problems.
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