My passenger side window will not go down. The motor is not bad, and the switch isn't bad. I took off the door panel and hooked up a new motor. Also hooked up a new switch on the passenger side. With both the old and new motor, still got nothing, but with the switch on the driver's side, the switch would operate both motors( new and old in the up position. So I have no way to roll down the window. Any ideas?