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Turn signal switch not working

Tiny
KWELCH.4495
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • 3.5L
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
What are the possible causes that make a turn signal switch stop working even though all bulbs are unknown? I have been having extreme difficulties diagnosing the potential problem so I can repair it. If any other information about mechanical problems is needed.
Thanks so much in advance for assisting! : )
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Thursday, February 17th, 2022 AT 11:55 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
There are a couple of things that can cause these issues but let's start by clarifying what is happening. When you turn the signals on, do they not work even though the bulbs are ok? You said the bulbs are unknown so does that mean you are not sure if they are okay?

Here is a guide that will help with getting us started on this issue:

https://www.2carpros.com/articles/turn-signals-not-working-blinker

However, if you are having an issue with none of the turn signals working, then we need to check the voltage coming out of the switch.

Basically, if you have power going to the switch through the fuses shown in the diagram below then the switch is the likely issue.

Here are a couple of guides that will help with this as well:

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Please see the wiring diagram below and let us know what you find. Thanks
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Friday, February 18th, 2022 AT 7:43 PM

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