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2001 XLT V10.. rear passenger window would not go down so I replaced the window motor, all went well.
With the switch and window went down nicely, would not return upwards. Changed switches with the other door, no change. Went to driver door and used the master there, nothing.
Pulled the motor back out, goes only one direction. Tested the old motor, same thing just opposite direction...old motor would not bring window down, new motor will not bring window up. ok..
Now, with them out, I plugged them into the socket again and used the driver door control for the right rear passenger window...nothing at all. At the passenger door itself we have the actuator going in one direction...at the drivers door trying to make the passenger rear actuator work..nada, zip, dead.
Took the motor and plugged it into another door and both motors are working perfectly..
So..can the driver door switch be bad and upsetting the system? I truly hate electrical...this confirms my distaste..
More than likely its the master switch, you need to test the circuits with a test light or DVOM. Reconnect both switches and the motor. Two circuits Red/Black, Yellow/Black are connected to the master switch, these two circuits feed the passenger rear window switch/motor. Both circuits should test good to ground with the switch in the neutral position. The Rd/Bk should have power in the Up position, The Ye/Bk should have power in the down position. If both circuits have power when held in either position you have lost ground thru the switch itself. If this is true, you could actually ground out the opposing circuit while holding the switch in that position and the motor should function. The power and ground supplies to the switch itself should be good in the fact the other motors function properly.