The rear speakers suddenly stopped playing today.
I turned the radio off and back on to see if there was a change.
Occasionally, the rear speakers would come on for 5 seconds and then stop.
With the fader in the center position, the speakers would come on for a few seconds and then stop. This happened repeatedly.
At one point they started working normally and I moved the fader constantly to see what would happen. For that one brief period, everything was normal.
The radio is back to intermittent rear speaker operation.

Is a dirty fader control the likely cause?
How do I clean it?

Thanks for the assistance,
Michael Diamante
1993 964 95K