Before you spend a lot of money on replacing the switch, try some electronics contact cleaner. Radio Shack or auto parts carry this. I liked the stuff from Radio Shack better, but was more expensive. Spray a copious quantity of contact cleaner into both the door wiindow switch and the master switch, and exercise the switches. I have had to do this to my 850 a couple of times, but four years later, the windows are still working. The switches are the usual suspect for inop windows. Motor failure not common.
Phantom
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