so today i went to go check out my power window problem, it wasn't rolling down or up, i checked everything and even cleaned the tips for the switch's (this is for the passenger side window) i took the door panel off to chaeck the motor. and i could tell that someone eles has already been inside that door panel and replaced the motor, because it is brand new, anyways i can hear the motor clicking to try to go down but it just wont could there be another problem that is holding it up? also where is the ground for the power windows at ?