Wiper Motor: Testing and Inspection

Current Draw Test






CAUTION: Do not handle any windshield wiper motor abusively when diagnosing wiper operations, as it will damage the magnets and make the windshield wiper motor inoperative. Rough handling of new replacement windshield wiper motors may also damage the magnets. To test the windshield wiper motor on the vehicle:
1. Disconnect the windshield wiper mounting arm and pivot shaft from the windshield wiper motor and disconnect the electrical plug.
2. Connect the green lead from Rotunda Alternator, Regulator, Battery and Starter Tester (ARBST) 010-00725 or equivalent, to the battery negative (-) post.
3. Connect the positive (red) lead from the tester to the common brush terminal.
4. Connect a cable from the battery positive (+) post to the low speed brush terminal. The current draw should not exceed 3.5 amperes.
5. Connect the cable from the battery positive (+) post to the high speed brush terminal. The current draw should not exceed 5.5 amperes.