Thanks again for your response.
If at all possible I would like to keep the original radio. As long as I leave the shifter in P or N it plays great! Also if I turn the ignition switch to just on ( not starting the motor ) I can shift to all gears (P R N 1 2 3 ) & it continues to play in every gear BUT with the engine on it only plays in P or N!
Could I have a bad ignition switch? Or dirty ignition switch? I have talked to another person with the same problem & have read on the web about this problem but no solution ( except buying a new unit ).
I have taken the radio out & all connections appear good!