weird turn signal problem - Chevy Impala SS Forum
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post #1 of 22 (permalink) Old 03-31-2017, 08:50 PM Thread Starter
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weird turn signal problem

When i use my turn signals the front left and right blink fine but both the tail lights blink instead of just one side. Anyone have any ideas what this might be? bulb? signal switch?
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post #2 of 22 (permalink) Old 04-01-2017, 04:20 AM
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You probably have a short either in the turn signal switch, or the wiring to the lights. You need a VOM to check the circuits. I would suspect the turn signal switch as my first pick.

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post #3 of 22 (permalink) Old 04-01-2017, 10:40 AM
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Originally Posted by jay96impala View Post
When i use my turn signals the front left and right blink fine but both the tail lights blink instead of just one side. Anyone have any ideas what this might be? bulb? signal switch?
check the rear lamps/wiring / sockets. use dielectric grease on the lamp sockets .
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post #4 of 22 (permalink) Old 04-01-2017, 12:16 PM
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Using dielectric grease will not fix a short. It is not a bad idea to use it, but it has nothing to do with the symptom.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #5 of 22 (permalink) Old 04-01-2017, 01:02 PM
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Using dielectric grease will not fix a short. It is not a bad idea to use it, but it has nothing to do with the symptom.
correct will not fix short but when you put bulbs back in then you add some of this dielectric grease to prevent bad connections as it can happen with moisture in there.
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post #6 of 22 (permalink) Old 04-01-2017, 01:33 PM
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Dielectric grease is most likely ok but prefer to use Bulb Grease for Socketed Bulbs....

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post #7 of 22 (permalink) Old 04-01-2017, 07:28 PM
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A bad bulb can cause that problem. Sometimes when the filament breaks, it shorts across the other filament that is on the common circuit for the parking lights.
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post #8 of 22 (permalink) Old 04-02-2017, 01:25 PM Thread Starter
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thanks for the replies, when you say in the turn signal switch do you mean this part that pulls out? or the part/mechanism actually inside the column?

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post #9 of 22 (permalink) Old 04-02-2017, 02:06 PM
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Since we don't know what you're driving here is the one for the Caprice/Impala and I think the Buick too. 1993 CHEVROLET CAPRICE 5.7L V8 Dimmer Switch | RockAuto
If you have a Fleetwood then this one, I believe it's Flash to Pass, would be the one. 1994 CADILLAC FLEETWOOD 5.7L V8 Dimmer Switch | RockAuto
If you order from RA don't forget your discount.
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post #10 of 22 (permalink) Old 04-02-2017, 02:21 PM Thread Starter
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sorry, 96 impala
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