Hey guys. I have an 03 blazer with 135k miles. I'm having an electrical issue. So I keep hearing my turn signal relay clicking when I'm not using my turn signal, which I DID use the search bar and saw people say it's the multi function switch, but... nobody else who had this problem mentioned my other half. When I hit the brakes the relay clicks super fast, sounds like a blown crackling speaker. But sometimes is stops the clicking when I hit the brakes. Most time is the fast clicks though. I almost feel like maybe it's something in the taillight housing? Not sure looking for input please! Thank you in advance!

 

And what are your turn signals actually doing? Do they flash?
What about all the other lights? Flashing with the relay clicks?
What about the turn signal witness in the dashboard?
Brake lights flashing when this happens?
How does the turn signal switch feel? Something broken?

You may need somebody to watch the exterior lights when it happens. As I understand you can reproduce the problem at any time which is a positive thing.

Seems a bit strange to me but I have seen stranger things happen with shorts, corroded connections, bad ground.

 

The indicator in the dash does not come on when the relay is clicking only if I actually use the turn signal. It doesn't do this all the time, only about 75% of the time honestly. The lights on the outside all work properly last I checked. Today I'll have a friend watch the outside one more time to make sure nothing changed and get back with you. Appreciate your input