Blinker noise non-stop.

[Paveltolz]

Suggestions solicited.
The truck is my neighbor's 99 3500 dually.
The turn signal's blinker noise is a constant regardless if the turn signals are on or off (the signals function as designed otherwise). He's a younger guy so instead of the noise being soothing like it is for those who drive for miles with their blinker on, it is driving him nuts:mad2:

I'm digging out the manuals but so far I am not feeling a lot of love with the index searches.:nonod:
Relay under the dash maybe?

Thanks

 

[ak diesel driver]

I've had the headlight switch do that but not so fast. it has a bimetal thermal limit switch that kinda clicks. otherwise I'd start pulling relays until it stops

 

[WarWagon]

Hazard switch on?
Circuit breaker(s) tripping and resetting - the silver cans by the fuses... due to shorted wiring or jammed seat/mirror motor switch. Possible breaker for brake controller or trailer power, esp if trailer batteries are dead.

Clicking can also be from a bad mode door actuator in the HVAC - check grounds then track down motor - likely recurc door.

 

[great white]

AK is on the right track, start pulling fuses, cb's and relays until it goes away....then fix it.

 

[TheDjost]

This one is a GM classic.

It's the contacts in the turn signal switch wearing away and making the grease just barely conductive. Just enough to fool the flasher relay into activating. It usually happens more in the summer when the heat makes the grease is a little runnier. Usually if you wiggle the flasher stalk a bit it "might" stop... for a while.

You just have to take the switch apart and clean the old grease off. Put some new dielectric grease in there and put it back together.

 

[iamdave0887]

This one is a GM classic.

It's the contacts in the turn signal switch wearing away and making the grease just barely conductive. Just enough to fool the flasher relay into activating. It usually happens more in the summer when the heat makes the grease is a little runnier. Usually if you wiggle the flasher stalk a bit it "might" stop... for a while.

You just have to take the switch apart and clean the old grease off. Put some new dielectric grease in there and put it back together.

x2. My new switch does this sometimes and wiggling the switch stops it. the old one was worse though so i just live with it.

 

[Paveltolz]

Thanks guys. I'm outa town the rest of the week and will get with him on Saturday to see if we can sort this out. Relays and breakers first though.

Paul