General audio question

[Finnegan]

Hi All,

My radio was installed by the PO, and it's exhibiting some irritating behavior. The left channel goes on and off, sort of at random. Road bumps can trigger the on-off. And, now I have a high pitched whine coming through the speakers which corrosponds to the rpms.

Both of these issues seem like wiring problems to me. But what do I know.

So, my question is, will a car audio place rewire an existing system, or do they only want to sell you a new system? If I can find a place to work on it, it should just be shop rates, right? How long would an operation like this take?

Thanks for any advice!