There are posts for this with pics. Do a search. You can use 3 ball bearings, nuts, or plastic dowls, to fix the motor. I assume you can hear the motor running endlessly - for that fix. If you hear the motor and it stops, then it must be hooked up and the track goes up and down. I just re-glued a window into the track on one side of car that motor stoped but window stayed up. Putting 3 balls in the motor on the other side that hear it running as long as I hold the button, and window stays up. Some tracks have the plastic cradle break, but there are metal replacements. Just click on the search button above and get the pics for all situations to help....Doug
PS: Don't forget to lube the window tracks so it is easier on the whole system.