I have a Chevy Cheyenne 1996 454 7.4 crew cab dually with a custom front end. It has been modified by the previous owner who knew how to do some things but not others.
I have an ongoing problem with the driver side blinker. They blink fast. I have already repaired the passenger side by rewiring the ground and replacing some faulty lights and wires, etc...
I tried the same thing to the drivers side with no luck. I replaced all bulbs, flasher as well as the multi function switch for the wipers and high beams.
I think it still may be a ground because when I hook up my boat trailer they work fine.
I'm no mechanic but know what I know. Any help would be appreciated.
I enclosed a photo of my front end as you can see it fiberglass. I have to ground to the frame.