These both failed, probably simultaneously. It's almost as if there's a fuse failure, but every single fuse (under hood and beside emergency brake pedal) is good, including the one and only "audio" fuse. But, it doesn't seem like you should have to replace an amp. to get power to the antenna. The antenna motor makes no noise, as if it's not getting power. My next step is to borrow a volt meter or light and see if the power plug to the antenna is getting juice. Any ideas? Thanks!
Modified by suzy at 10:53 AM 9/6/2005

I wonder if it is really a radio malfunction? Possibly check the connections on the back of the radio.

Good suggestion, Jeff. I did the dashboard limbo once more to check, but was quickly discouraged by not being able to get close to the back of the stereo. I may put up with the impaired audio for a while as I gather the energy to dig deeper. Thanks