I have a 1991 740 wagon. After finding the battery dead, jumper cables were applied incorrectly almost frying the engine. The dead battery was replaced, and the car works fine, but the radio/stereo never worked again. The factory radio/stereo will not turn on. All the related fuses were checked and are fine. Is this some sort of relay issue? I'd like to investigate any electrical issues before replacing the radio/stereo.
Thanks!
Thanks!