Gday,
All issues I have had, or fixed for others have just been a crack in the circuit card of the ?amplifier? unit in the drivers door. It is a little black box about one inch by 2 looks like a relay. I think it actually is. has contacts. Any way, if your windows are intermittent or not at all, pop open this little sucker and slide out the card. on the back where the main contacts are you will probably see one slightly darker than the rest. Use good light and/or a magnifying glass. Simply apply a hot soldering iron to reseal the crack. Maybe a dab of solder on the tip to build it up slightly.
Hope this saves someone from handing over 60 bucks plus to the auto sparkies one day...

Josh