Front Power Window Motor Inspection

Remove (-) negative battery terminal.
Remove the rear door trim panel. Refer to FRONT DOOR .
Disconnect the motor connector from the motor.

Fig 1: Identifying Front Power Window Motor Connector Terminals
Courtesy of KIA MOTORS AMERICA, INC.
Connect the motor terminals directly to battery voltage (12V) and check that the motor operates smoothly. Next, reverse the polarity and check that the motor operates smoothly in the reverse direction. If the operation is abnormal, replace the motor.