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Home >> Chevrolet >> 2010 >> Traverse LS, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Circuit/System Testing >> Windshield Wiper Motor Circuit Malfunction

Windshield Wiper Motor Circuit Malfunction

  1. Ignition OFF, disconnect WPR relay.
  2. Test for less than 20 ohms between the ground circuit terminal 85 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Test for less than 20 ohms between the ground circuit terminal 87A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 87 and ground.
    • If the test lamp does not illuminate, test or replace the underhood fuse block.
  5. Install a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.
  6. Using the multifunction switch, command the low speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  7. Ignition OFF, disconnect the WPR HI relay.
  8. Test for less than 2 ohms between the control circuit terminal 30 at the WPR relay and the control circuit terminal 30 at the WPR HI relay.
    • If greater than the specified range, replace the underhood fuse block.
  9. Connect the WPR relay.
  10. Test for less than 20 ohms between the control circuit terminal 30 and ground.
    • If greater than the specified range, test or replace the WPR relay.
  11. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 85 and ground.
    • If the test lamp does not illuminate, test or replace the underhood fuse block.
  12. Install a test lamp between the control circuit terminal 30 and ground.
  13. Using the multifunction switch, command the low speed wipers ON. The test lamp should turn illuminate.
    • If the test lamp does not illuminate, replace the WPR relay.
  14. Install a test lamp between the B+ circuit terminal and the control circuit terminal 86.
  15. Using the multifunction switch, command the high speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  16. Ignition OFF, connect the WPR HI replay. Disconnect the harness connector at the windshield wiper motor.
  17. Test for less than 20 ohms between the ground circuit terminal 4 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  18. Connect a test lamp between the control circuit terminal 2 and ground.
  19. Using the multifunction switch, command the low speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the WPR HI relay.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the WPR HI relay.
  20. Connect a test lamp between the control circuit terminal 1 and ground.
  21. Using the multifunction switch, command the high speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the WPR HI relay.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the WPR HI relay.
  22. Wipers OFF, verify a test lamp illuminates between the signal circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the signal circuit for a short to ground or an open high resistance. If the circuit tests normal, replace the BCM.
  23. If all circuits test normal, test or replace the windshield wiper motor.
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