fuses, switches or the motor itself

an easy way to see if power is getting to the motor is:

while the engine is running (idle, parked) operate the switch to the window that doesn't work. if you notice a change in idle speed (it's slight), then power is making it to the window motor, which means the motor is bad.

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-justin

1987 300TD, 1987 300TD
2008 R32, 2000 Passat Wagon