Front Power Window Motor

Disconnect the negative (-) battery terminal.
Remove the front door trim.
(Refer to "FRONT DOOR TRIM ")
Disconnect the connector (A) from the motor.
(A: Safety, B: Standard)

Fig 1: Front Power Window Motor Connector End View
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.
[General Window Motor]

Fig 2: General Window Motor Connector Terminals Continuity Chart
Courtesy of KIA MOTORS AMERICA, INC.
Connect the terminal No. 2 and No. 3 to battery voltage (12V) and check that the motor operates smoothly when connecting the terminals below.
[Safety Window Motor]

Fig 3: Safety Window Motor Connector Terminals Continuity Chart
Courtesy of KIA MOTORS AMERICA, INC.