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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> Rear Wiper System Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the multifunction switch - I/P.
  2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to Power Mode Mismatch .
  3. Ignition OFF, connect the harness connector at the multifunction switch - I/P. Disconnect the harness connector at the rear window wiper motor.
  4. Test for less than 20 Ω between the ground circuit terminal B and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  6. Verify a test lamp illuminates between the ignition circuit terminal E and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  7. Rear wiper switch in the ON position, verify a test lamp illuminates between the signal circuit terminal D 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, test or replace the I/P switch assembly.
  8. If all circuits test normal, test or replace the rear window wiper motor.
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