The "FM Stereo" light will only illuminate if you've picked up an FM Stereo station with sufficient strength for it to be received as stereo. If you have poor signal strength, it may pick up the station but revert to mono, and that light won't illuminate.
If you have confidence that by location, antenna or some combination you are receiving stereo FM stations with plenty of signal, then the bulb isn't working or the circuit that drives it has a problem, or both. The centered-channel indicator is separate.
Phil
If you have confidence that by location, antenna or some combination you are receiving stereo FM stations with plenty of signal, then the bulb isn't working or the circuit that drives it has a problem, or both. The centered-channel indicator is separate.
Phil