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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System & Washer System >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Circuit/System Testing >> Multifunction Switch Circuit Malfunction

Multifunction Switch Circuit Malfunction

  1. Ignition OFF, disconnect the X1 harness connector at the multifunction switch.
  2. Ignition OFF, test for less than 20 ohms between the ground circuit terminal 7 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit test normal, replace the BCM.
  3. Ignition ON, verify the scan tool Windshield Wiper Switch parameter is Off.
    • If not the specified value, test the signal circuit terminal 4 (with W49) or terminal 10 (without W49) for a short to ground. If the circuit tests normal, replace the BCM.
  4. Verify the scan tool Wiper High Speed Switch parameter Inactive.
    • If not the specified value, test the signal circuit terminal 5 (with W49) or terminal 9 (without W49) for a short to ground. If the circuit tests normal, replace the BCM.
  5. Install a 3A fused jumper wire between the signal circuit terminal 4 (with W49) or terminal 10 (without W49) and ground. Verify the scan tool Windshield Wiper Switch parameter is Switch Fault.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  6. Install a 3A fused jumper wire between the signal circuit terminal 5 (with W49) or terminal 9 (without W49) and ground. Verify the scan tool Wiper High Speed Switch parameter is Active.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  7. If all circuits test normal, test or replace the multifunction switch.
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