recently repaired a rear window that was clicking, motor running , no window movement. I discovered the following
I found out the first and formost...plan to take the entire motor and gear essembly out of the door.

I found the clicking to be cause by the motor gear itself running past the teeth on the other geared part. At that point the coiled spring won't retrn the arm.The entire windo mech. was bent and had to straightened.

make sure the arm is attached to the slide at the bottom of the window into the white nylon clip. Grease the slide, wave garlic over your head three time, throw salt over your right shoulder, and do what I did...start on the other three windows that have the same problem.

Doctormike.........