2007 Camry Steering Wheel Audio Controls not working
 

I have a 07 Camry with a factory in-dash DVD player. The controls on the steering wheel stopped working a few months ago and I can't figure out why. I can't find the fuse on the manual that controlls it either. I went to the dealership and they said they charge $125 just to look into the problem!!!:eek: Any advise??????