My power window switch has suddenly stopped. I can not lock the doors by the remote. Must be done manually, individually. When I press the lock button on the remote i get a horn beep but the locks do not work. Everything else, including the electric doors, works fine. I can't find a fuse but i don't think that's it, because the horn beeps when I push the remote. I bought this car new and it only has 72,000 miles on it. It has everything made then.