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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1107 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> Headlamp Washer Malfunction >> Circuit/System Testing >> Washers Always On

Washers Always On

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the WSW 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, test or replace the BCM.
  3. Ignition OFF, disconnect the X2 harness connector at the underhood fuse block.
  4. Ignition ON, verify that a test lamp does not illuminate between the windshield washer relay control circuit terminal 13 and battery voltage.
    • If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, test or replace the BCM.
  5. If all circuits test normal, test or replace the underhood fuse block.
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