Hey guys... what could cause a constant, and annoying electronic buzz in my 1993 5.0. The previous owner installed an aftermarket stereo, tach, etc, but I really don't think that is it.
The noise is constant when the car is on. Doesn't go away no matter what you do inside the car, not does it ever change.
So I'm thinking something under the hood. But I don't have a clue where to look or what to do. I guess I can replace the wires, plugs, cap, etc, but something tells me that ain't it. It's too constant to be related to speed/revolutions.
Anyone, anywhere, have this problem before?
Thank you.
Brad