Hi guys, I have a 94 RX7 FD. Its radio is stock (non bose). AM radio and CD are working but only FM is not working at all. Can anyone give me an insight what the problem is? Thanks in advance!

 

If the antenna is connected and in good shape than the radio has a short in it.

 

If it's the original, you might want to think about upgrading to a more modern version.
Many late model Mazda radio/cd players will work with minor changes (remove the din bar to make it a 2 din space.

Since you're non--Bose, you would have lots of options and they're on e-bay.

Updated electonics and updated oem look