I'm not sure if it was like this when I got it since I have rarely driven the car, but I noticed after I installed my PLX wideband in the ash tray that my volume control doesn't work. There is sound comeing out of the speakers from the radio but I can't turn it up to hear it.

 

might be a bad switch. i say just get rid of the stock stereo. it sucks anyways. i got rid of all the factory sound system stuff about 2 hours after i drove the car back from florida.

 

it could be your amp..try testing your amp to see if its a bad one

 

I suffered the same issue. The control unit behind the **** was fried. I New unit cleared it all up.

 

MKORSU: Did your heater control also go out? That doesn't work either, I'll pull it apart one of these days and see if I maybe overlooked something when I had it taken apart.

 

They are both part of the same unit.