Have you tried taking the mechanism out and greasing it? That is what causes the windows to be slow or not work. Or is it definately the motor at fault?
Trafic, Twingo GT, Vel Satis Turbo x 2, Clio V6 Proto Ph2, Vel Satis 3.5, Avantime, Alpine A610, GTA Atmo x 3, GTA Turbo x 3, R5 Gordini Turbo Mid Engine, Alpine A310 4cyl, Alpine A110, Yellow Smart
I did that. Knew it was electrical because the window went up fast and down slow. Took the switch to bits, cleaned it up and hey-presto fast up and down!