Originally Posted by
FordMan77
Broken regulator. While you have the door panels off to change out the regulators it would be a good time to lube up the felt window guides with some graphite spray. They get dry, the window sticks and then you have a broken regulator. Spray the crap out of them and work the window up and down a few times.
FYI the motors are usually fine. If you look you can find the regulator separate from the motor. I found mine on ebay. If you have to replace the motor and regulator together, before you put the door panel back on be sure to test the window and be sure the switch moves it in the correct direction. Some of the aftermarket ones I've run into are wired backwards. If this happens, just pull the wires from the harness that connects to the motor and reverse them in the plug and retest.