I have a 2000 Pontiac Bonneville it has electric windows and mirrors, last fall, the three non drivers door windows just stopped working, I have checked all the fuses and they are good. Is there a relay or other module that controls them?
There is no fuse for that. They all operate off the same circuit breaker. The master switch acts as a control module and supplies power for the other 3 so there is a good chance that is where your problem is although the circuit should be tested thoroughly to confirm that.