Electric Windows seem to be a bit of a bone of contention.
Don't let a seller tell you "It's probably just a fuse" if one of your windows doesn't work, there are no fuses.
I have spoken to a couple of other Voyager users and they say the same.
Keep the window tracks oiled so there is no resistance for window going up and down.
Seems once the tracks either end dry up, the motors slow down and that's when problems can start.
I use some 3 in one oil, not WD40, and my once slow windows now nip up and down.
Just a thought!!
- DrBarrie, Richardvaughan and Shandy123 like this