Ok, it looks like some clarification is needed here.
Your radio has two components to it. The head, located in the dashboard, and the RCU
, located in the trunk on the driver's side, IIRC
. The head contains all of the controls, and the tape deck or CD Player. The RCU
contains the amplifier and the tuner.
Given your failure mode, there is a high likelihood that the issue lies with your RCU
. They're relatively inexpensive at junk yards and on eBay. I'd start there before anything. Failing that, there's a smaller chance that you have a bad MLPS. If jiggling the gear selector, or changing between ranges allows the radio to work, then this could be the issue as well. I'm hesitant to say it's that however, as a MLPS failure is also accompanied by strange transmission and sometimes steering behaviors.