Tonight, I pulled the glove box and had a look. I disconneted and reconnected the fuse (10amp I think), the connector that looks like a head phone jack (mini-din?) (microphone?) and the funky, one-wire connector that I can't describe.
After doing that, I tested and it worked again.
Hmm.... Bad connection? Obviously, but which one, if any, of the ones that I touched?
Well, next time it happens, I at least know to try one at a time.