I have a 99 audi A4.... Grabbed the power antena adaptor, stupidly pluged the remote wire from the adaptor into a 12v source... (I know very stupid)... so I caught my mistake after I plugged it into the tuner module, now after succesfully rewiring... all I get is AM... the signal strength for the fm station shows as being there, however all I here is a fuzzy drone.... have I done something really bad here?