The passenger side front power window on my 1993 850 stopped rolling up two weeks ago. There was never a problem rolling it down. If I messed with the window and kept pushing the switch it would eventually roll up with help(pulling up the window with my free hand). I did a search and thought it was probably the switch, and changed the switches out. It persisted with the same behavior. I did another search and thought the tracks needed to be lubicated. I took the door panel off and lubicated the tracks. It persists with the same behavior. I take the window motor off and take it to the part store, and the motor is working fine. With the motor off the window can be move up and down manually with some resistance noted at times, but not a lot. All the other three windows are working fine. I would greatly appreciate any help you could provide. thanks