I have the same problem and have also done the above. I have to turn off the ventilation fan so there's enough juice. I'm beginning to suspect some connection is corroded or bad. Passenger side runs ok.
My passenger side does it but not all the time...I did hear that if the window goes up slowly then the motor is knackered...However mine has been doing it for 3 years?...Although if i operate the switch with the engine on then its fine..