Voltage is sent from battery through the up\down switch to the window roller upper moter. The motor moves the regulator up and down. The window is connected to the regulator. To check if the motor is bad try taking some jumper wires and connecting a 12 volt battry to the motor. It should go up or down. You can reverse the polarity and it will move the opposite way. It the motor moves this way then your switch is bad. Make sure you check fuses first though.
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