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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1936 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> Rear Wiper Washer System Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the rear window wiper/washer module.
  2. Ignition ON, rear wiper/washer switch in the WASHER position, test for ignition voltage between the signal circuit terminal 1 and ground.
    • If not than the specified value, test or replace the multifunction switch.
  3. Ignition OFF, connect the harness connector at the rear window wiper/washer module. Disconnect the harness connector at the rear washer motor.
  4. Test for less than 10 ohms between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Ignition ON, rear wiper/washer switch in the WASHER position, verify a test lamp illuminates between the control circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the rear window wiper/washer module.
  6. If all circuits test normal, test or replace the rear washer motor.
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