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Power Window Motor

Remove power window motor. See POWER WINDOW MOTOR  under REMOVAL & INSTALLATION. Secure power window motor gently in vise. Using fused jumper wires, briefly apply positive battery voltage to terminal No. 1 and negative battery voltage to terminal No. 2 at power window motor. See Fig 1 . Power window motor should operate. When polarity is reversed, power window motor should operate in opposite direction. If power window motor does not operate as described or is noisy, replace power window motor.

Fig 1: Identifying Power Window Motor Terminals
G98F04519Courtesy of BMW OF NORTH AMERICA, INC.