LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1107 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> DTC B3873 >> Circuit/System Testing

Circuit/System Testing

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.

Windshield Washer Pump Relay Control Circuit Test

  1. Ignition OFF, disconnect the X4 harness connector at the BCM.
  2. Ignition ON, verify the windshield washer pump is not on.
    • If the windshield washer pump is on, test the windshield washer pump relay control circuit terminal 15 for a short to ground. If the circuit tests normal replace the underhood fuse block.
  3. Install a 10A fused jumper wire between the relay control circuit terminal 15 and ground. Verify the windshield washer pump is on.
    • If the windshield washer pump is not on, test the relay control circuit for an open/high resistance or short to ground. If the circuit tests normal replace the underhood fuse block.
  4. If all circuits test normal, replace the BCM.
scientia non olet · About LEMON Manuals