I've inherited my Dad's old pickup, and it has a few "issues". One of which is a problem that plagued him since he bought the truck new. It's a Prospector model with a simple AM radio. The radio would get an awful squawking interferrence from time to time. He had it replaced at least once, and when I got it, it got so mad I whacked it so now it no longer gets any reception
. The noise now is constant, but the whole radio turns off (clock included) if I turn on the headlights. The other, possibly related symptoms are a loud buzzing that comes from behind the dash to the left of the cigarette lighter (some kind of relay or regulator is behind there) that happens intermittently, but seems
like it only can occur when the lights and
wipers are on. Also, the emergency flashers don't blink, even after changing the "can".
I know this is a lot to diagnose from a forum post, but thought maybe there's a known issue that could tie all this together, like the do-dad behind the dash.