Originally Posted by
TechChild
I'm having the same issue does he have a poineer deck becaus thats what usally causes it on these head unit I am going to try the rca ground fix to see if it helps.
I don't know who started that ridiculous rumor that wrapping copper wire around the grounds will help anything.
The common ground for the radio is the ground wire that runs to ground from the harness.
If anything you should route the harness ground to the chassis at a sanded spot with a stainless steel screw.
Proper wiring in the first place > that ugly picture ^