[grapro]

I have a 1999 Chev pickup and lately the combination flasher is continuing to flash and make noise. My lights are all good and work normally but the fashers flashes and makes noise but doesn't affect anything but become a irritating nuisance. I changed the flasher and it still does this. Anyone have any ideas what this could be?

[justacertifiedtech]

when the flasher is making noise (clicking) is it actually turning your signal or hazard lights on and off. or are you getting just the noise?
If its just the clicking with no lights, I am trying to recall the style of flasher.
Is it a solid state piece that is refered to as the flasher module?
The reason I'm asking is, if it is the module type I have ran into this issue multiple times, but on cars only. Basically this flasher module is extremely sensative and will detect extremely low stray voltage coming through the multifunction switch and actually energize the internal switching circuits (making the clicking noise)although the voltage is not actually enough to light a bulb, or sometimes even detect with a DMM. If this is the case and this is the style system you have, put in a multifunction switch, this should take care of it.
Like I said I've run into this many times probaly 30 or more but always on cars and only once was I able to detect the voltage and it was less that .2v on the feedback circuit so it is very hard to prove that the multifunction is bad other than just replacing it.
GL, Hope this helps

[grapro]

That is exactly what happens. What is this switch you are talking about and how do you hook it up.
Thanks
Grapro

[justacertifiedtech]

Basicaly its your turn signal switch its called multifunction because ...well it has multiple functions. lol turn signals, headlamp dimmer, sometimes cruise
if you want to do this replacement yourself its not very difficult but if you get stuck on something the Haynes manuals you can pick up at autoZ should be able to walk you through it.
Best of Luck,
tech