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B1476Wiper High Speed Circuit Motor Failure

The OBD2 code B1476 indicates a failure in the high-speed circuit of the windshield wiper motor, suggesting that the motor is not functioning properly when set to high speed

Definition

The OBD2 code B1476 indicates a failure in the high-speed circuit of the windshield wiper motor, suggesting that the motor is not functioning properly when set to high speed

Common causes

  • Faulty wiper motor
  • Damaged wiring or connectors
  • Blown fuse
  • Malfunctioning wiper relay
  • Corrosion in electrical connections
  • Short circuit in the wiper circuit
  • Faulty wiper switch
  • Grounding issues

Common misdiagnoses

  • Wiper Motor Failure
  • Wiper Relay Issues
  • Faulty Wiper Switch
  • Wiring Harness Problems
  • Grounding Issues
  • Body Control Module (BCM) Malfunction
  • Fuse Issues

Troubleshooting steps

  1. 1.Check the Wiper Motor

  2. 2.Inspect the wiper motor for any visible damage or corrosion

  3. 3.Test the motor by applying direct power to it to see if it operates in high-speed mode

  4. 4.Inspect Wiring and Connectors

  5. 5.Examine the wiring harness and connectors leading to the wiper motor for any signs of damage, fraying, or corrosion

  6. 6.Ensure that all connections are secure and free of dirt or moisture

  7. 7.Test the Wiper Switch

  8. 8.The wiper switch may be faulty. Use a multimeter to test the switch for continuity in the high-speed position

  9. 9.If the switch is defective, it may need to be replaced

  10. 10.Check the Fuse

  11. 11.Locate the fuse for the windshield wipers in the fuse box and check if it is blown. Replace it if necessary

  12. 12.Inspect the Wiper Relay

  13. 13.If your vehicle has a relay for the wiper system, test it to ensure it is functioning properly. You can swap it with a similar relay in the fuse box to see if that resolves the issue

  14. 14.Scan for Additional Codes

  15. 15.Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the problem

  16. 16.Check for Ground Issues

  17. 17.Ensure that the wiper motor has a good ground connection. A poor ground can cause intermittent or non-functioning components

  18. 18.Look for Water Intrusion

  19. 19.Inspect the area around the wiper motor for any signs of water intrusion, which can cause electrical issues

  20. 20.Consult Wiring Diagrams

  21. 21.Refer to the vehicle’s service manual for wiring diagrams to trace the circuit and identify any potential issues

  22. 22.Professional Diagnosis

  23. 23.If the problem persists after performing these checks, consider taking the vehicle to a professional mechanic or an automotive electrician for a more thorough diagnosis. By following these steps, you should be able to identify the cause of the B1476 code and take appropriate action to resolve the issue