My 95' BMW E38 recently broke down its audio system. I can't hear anything from radio or CD set. It is difficult to find the cause. I even tried connecting only amplifier and radio module (no luck). Things I have eliminated already:
- Speakers are ok
- Fuse in radio tuner located in the trunk is ok
- Other fuses are ok too
- Radio module is ok
My car has 4:3 TV and cassette slot in the front panel. Tuner, amplifier, CD changer, GPS, TV module and GPS module are located in the trunk.