Power locks, seat and Rear Defrost..

[**Shanna**]

I have a 1991 Grand Prix and last week the Power locks, seat and Rear Defrost just stopped working all at the same time....When I press the lock button i hear a little click which sounds like it is coming from the glove box...My brother checked the Fusses and there fine...He had a 92 and it did this same thing and he never figured out what happened....These things have nothing in common but must link in some way..

Please someone help me out..My car is important to me and i like being able to lock it at night...LOL....thanks so mucy for ANY info or advice!!