Radio humming
We're living in a 28' 1978 Prowler. A very basic trailer, by today's standards. Anyway, it has an AM/FM/8-track player. Its an aftermarket thing that I can only guess was installed in the late 70s....
Forum Discussion
To be clear, you disabled the previous owner speaker wire/power wires? A new ground is more important than positive power. If both power wires are new and home run you may have other ground issues. Using metal staples on speaker/power wire is not ideal. This could create a partial short to ground creating excessive power drain.
