No turn signals

DRC1989

MEMBER
1989 CHEVROLET TRUCK

My turn signals quit.I changed the fuse, flasher fuse, turn signal switch, head lamp switch. Flashers all work but no t/s. Only half of instrument cluster is lit up now

Sunday, February 7th, 2010 AT 3:02 PM

7 Replies

JDL

MECHANIC
16,098 POSTS

Welcome, just talking about turn signals. Did you check circuits at turn signal switch while you were replacing switch? Sure would have been a good time.

Here is a guide and some diagrams so you can do some testing

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

There is probably a multiwire connector under the dash close to steering column, for circuits going to and from the column. You can see wiring colors in diagram. Use testlite on proper wiring circuit, see if it is hot when it should be?

Larger diagram below, sorry they are in pieces.

Please let us know what happens so it will help others.

Cheers

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Sunday, February 7th, 2010 AT 3:27 PM

DARKESTNIGHTS

MEMBER
10 POSTS

Ok I had a similar problem so I checked my tail light circuit board that I plug my lights in too and found them rusted and messing up the connection so I replaced both of them and now I dont have the problem and for your instrument cluster lights there is a connection by the flasher that is roughly about 2.5 inches long and one on the column one of the 2 might have come loose!

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Thursday, August 19th, 2010 AT 9:44 AM

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

Great addition to this thread! Please feel free to help out whenever you are on the site :)

Cheers, Ken

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Wednesday, October 18th, 2017 AT 3:43 PM

DRTTRKRCR8D

MEMBER
1 POST
CHEVROLET TRUCK

I have a 83 K10 chevy and when I have my lights on my left turn signal wont blink the right one does and they both work when the lights are off I checked bulbs and they are all good and cleaned grounds but cant figure it out is there any help out there?

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Wednesday, October 18th, 2017 AT 3:43 PM (Merged)

GSOLLENBERGER

MEMBER
2 POSTS

Having grown up back east where cars rust a lot, this problem is typical of losing the ground, whether at the bulb, in the socket assy, or even the ground to the fender and/or frame. The lights work without the parking light because they get a ground through the park filiment to another ground at another socket. That ground goes away when the lights are turned on.