Lil' Demon

Suddenly too.. I drove the car to work fine. parked it. when I went to drive home I noticed that none of my controls on the steering wheel (for like the radio) were working. I checked some fuses but didnt see any specifically labeled for that and pulled a few but all were ok.
The radio itself still works fine. It appears that there is only one fuse for the radio and the controls (#17) so it can't be that. Its all stock - radio, steering wheel. I do have an external 10 disk cd changer in the back with a remote in the front but nothing changed there either. Ideas?

What could this be?

93 Formula