This issue has happened a couple of times. When playing the radio, the rear speakers suddenly stop producing sound. It will remain this way until I shut off the vehicle. Come back out the next morning, and the speakers work fine. Won’t happen for months. Then it does the same thing. I suspect it is the head unit, but I haven’t had time to check anything yet. Rockford Fosgate system.

Radio won't turn on I think I have blown a fuse