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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System >> Diagnostic Information and Procedures >> DTC B3875 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the X5 harness connector at the BCM.
  2. Install a 10A fused jumper wire between the WIPER 1 relay control circuit terminal 20 and B+.
  3. Ignition ON, verify that the high speed wipers are not on.
    • If the high speed wipers are on, test the WIPER 2 relay control circuit terminal 21 for a short to ground. If the circuit tests normal, replace the underhood fuse block.
  4. Install a 10A fused jumper wire between the WIPER 2 relay control circuit terminal 21 and ground. Verify the high speed wipers are on.
    • If the low speed wipers are not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the underhood fuse block.
  5. If all circuits test normal, replace the BCM.
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