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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 673 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESWASHER MALFUNCTIONCIRCUIT/SYSTEM TESTING
2006 Chevrolet Cobalt SS, 4D Sedan, Standard

Circuit/System Testing

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Windshield Washer Switch Circuit Test

  1. Ignition ON, verify that the scan tool Windshield Washer Switch parameter is Active while pressing the washer switch.
    • If not Active, test the following:
      • Perform the multifunction switch component test.
      • Test the windshield washer switch signal circuit for an open/high resistance. If the washer switch and circuit test normal, replace the body control module.
  2. Ignition OFF, disconnect I/P fuse block connector X4.
  3. Connect a test lamp from battery voltage to the windshield washer pump relay control circuit in connector X4 terminal A3.
  4. Ignition ON, verify that the test lamp illuminates while pressing the washer switch.
    • If the test lamp does not illuminate, test the washer relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the body control module.
  5. If all circuits test normal, replace the underhood fuse block.

Windshield Washer Pump Circuit Test

  1. Ignition OFF, disconnect the harness connector at the windshield washer fluid pump.
  2. Test for less than 1 ohm of resistance between the ground circuit terminal 1 and ground.
    • If greater than 1 ohm, repair the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the washer pump control circuit terminal 2 and ground while pressing the washer switch.
    • 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, replace the underhood fuse block.
  4. If all the circuits test normal, replace the windshield washer fluid pump.

Windshield Washer Pump Always On Circuit Test

  1. Remove the FRT WASH fuse from the underhood fuse block. The washer pump should turn OFF.
    • If the washer pump does not turn OFF, test the washer pump control circuit for a short to voltage.
  2. Ignition ON, verify the scan tool Windshield Washer Switch parameter is Inactive.
    • If not Inactive, test the following:
      • Perform the multifunction switch component test.
      • Test the windshield washer switch signal circuit for a short to ground. If the washer switch and circuit test normal, replace the body control module.
  3. Ignition OFF, disconnect I/P fuse block connector X4.
  4. Ignition ON, verify that a test lamp does not illuminate between the windshield washer relay control circuit in connector X4 terminal A3 and battery voltage.
    • If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the body control module.
  5. If all circuits test normal, replace the underhood fuse block.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.