I have a 2000 Bonnie SSEi. When I got the car the drivers windows and pass windows worked fine from drivers door along with seat memory and power mirrors. Now a couple times everything would quit working and I would play with the seat mem buttons and I would get a beep and all would be good again. Now all has stopped working and nothing seams to work. I have another DDM that has had the same results, No power windows, locks, mirrors, or seat memory the lights light up on the switches but nothing works. Does anyone have any ideas?

Sounds like a ground issue. If you have access to a Tech II scanner you can chase the problem down pretty easy. Otherwise...pull out the DMM and start wiggling wires.

I have already sanded and cleaned the ground bus at the drivers pillar, and fixed the wires under the drivers seat wHere that plastic connector was. I just took the switch apart and cleaned it under the rubber piece but nothing works!

was it a beep, or a bong?

a beep

i have the same issue. did you figure this one out?

I thot i did but now nothing works again, the car got wet inside and everything worked so everyone i talked to said it was a bad ground so instead of tracing all that i ran a new ground splicing at all the ground busses all the way to the ddm and still nothing so i ran new power all the way up n still nothing. Im thinking the ground was bad but when i fixed that i think the ddm went bad, so at this point i hate these cars and the electrical nightmare they are

Sorry to hear. I'd have to agree with you on that last point. I'm at the same place