Wiper Motor: Testing and Inspection

CAUTION: Do not handle any windshield wiper motor abusively when diagnosing wiper operations because it will damage the magnets and make the windshield wiper motor inoperative. Rough handling of new replacement windshield wiper motor may also damage the magnets.

To test the windshield wiper motor on the vehicle, disconnect the drive linkage of the windshield wiper assembly from the windshield wiper motor and disconnect the electrical plug. Connect the green lead from the test equipment, such as Rotunda Alternator, Regulator, Battery and Starter Tester (ARBST) 010-00725 or equivalent, to the battery negative (-) post. Connect the positive (red) lead from the tester to the common brush terminal. Connect a jumper from battery positive (+) post first to the low-speed connection and then to the high-speed connection at the connector plug as shown. The current draw should not exceed 3.5 amperes at low and 5.5 amperes at high.