WOMS
B code body Medium severity

B1450 Wiper Wash/Delay Switch Circuit Failure

The OBD2 code B1450 indicates a malfunction in the wiper wash/delay switch circuit, which may affect the operation of the windshield wipers and washer system

Definition

The OBD2 code B1450 indicates a malfunction in the wiper wash/delay switch circuit, which may affect the operation of the windshield wipers and washer system

Common causes

  • Faulty wiper wash/delay switch
  • Damaged wiring or connectors
  • Short circuit in the circuit
  • Corroded terminals
  • Failed body control module (BCM)
  • Poor ground connection
  • Blown fuse related to the wiper system

Common misdiagnoses

  • Faulty windshield wiper motor
  • Bad wiper relay
  • Defective body control module (BCM)
  • Wiring issues or shorts in the harness
  • Malfunctioning wiper switch
  • Low washer fluid level sensor failure
  • Faulty fuse related to wiper system

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information related to the wiper wash/delay switch circuit. This can provide insights into the wiring diagrams and component locations

  2. 2. Visual Inspection

    Inspect the wiper wash/delay switch and its wiring for any visible damage, such as frayed wires, corrosion, or loose connections

  3. 3. Check the connectors for signs of wear or damage

  4. 4. Test the Wiper Wash/Delay Switch

    Use a multimeter to test the switch for continuity. Ensure that the switch operates correctly in all positions

  5. 5. If the switch is faulty, it may need to be replaced

  6. 6. Check Fuses

    Inspect the fuses related to the wiper system. A blown fuse can cause the circuit to fail

  7. 7. Replace any blown fuses and retest the system

  8. 8. Inspect the Wiper Motor

    Check the wiper motor for proper operation. If the motor is malfunctioning, it may not respond to the switch inputs

  9. 9. Test the motor by applying direct power to see if it operates

  10. 10. Examine the Wiring Harness

    Follow the wiring from the switch to the wiper motor and check for any breaks, shorts, or poor connections

  11. 11. Repair or replace any damaged wiring as necessary

  12. 12. Scan for Additional Codes

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

  13. 13. Address any other codes that may be related to the wiper system

  14. 14. Check Ground Connections

    Ensure that all ground connections related to the wiper system are secure and free of corrosion

  15. 15. A poor ground can lead to circuit failures

  16. 16. Test the Body Control Module (BCM)

    If all other components check out, the issue may lie within the BCM, which controls the wiper system

  17. 17. Consult the vehicle's service manual for testing procedures for the BCM

  18. 18. Clear Codes and Test Drive

    After performing repairs, clear the trouble codes using the OBD-II scanner

  19. 19. Take the vehicle for a test drive to see if the code reappears.1

  20. 20. Consult a Professional

    If the issue persists after following these steps, it may be best to consult a professional mechanic or technician for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1450 code