Component Tests

CAUTION: Do not handle the windshield wiper motor abusively when diagnosing the wiper operations. Failure to do so may result in damage to the motor magnets and will make the windshield wiper motor inoperative. Rough handling of a new windshield wiper motor may also damage the motor magnets.

Use Alternator, Regulator, and Starter Tester (ARBST) to test the wiper motor on the vehicle.

To test the wiper motor, disconnect the wiper mounting arm and pivot shaft from the wiper motor.







Disconnect the wiper motor connector. Connect the (A) green lead from the (B) ARBST to the positive post. Connect the (C) red lead from the tester to the wiper motor (D) common brush Pin 5 component side.

Test the low speed mode by connecting a (E) cable from the battery negative post to the low speed brush Pin 6 and measure the current draw. If the current draw is greater than 3.5 amperes, install a new wiper motor.

Test the high speed mode by connecting a cable from the battery negative post to the (G) high speed brush Pin 7 component side and measure the current draw. If the current draw is greater than 5.5 amperes, install a new wiper motor.