HI there,
I can almost catagoricaly tel you that it is always the radio. I have had two fitted now, worked for a few weeks and then dead again. It is linked to either the amplifier or directly to the speakers. It is a nuisance as mine hasn't worked for 3 months now, don't know how I have survived this long. Local auto electrician is going to look into it for me.
Best of luck.
Geraint
Geraint Lewis, October 2009