WOMS
B code body Medium severity

B1753 Hazard Flash Output Circuit Failure

The OBD2 code B1753 indicates a malfunction in the hazard flash output circuit, which may affect the operation of the vehicle's hazard lights

Definition

The OBD2 code B1753 indicates a malfunction in the hazard flash output circuit, which may affect the operation of the vehicle's hazard lights

Common causes

  • Faulty hazard switch
  • Damaged wiring or connectors
  • Short circuit in the hazard flash output circuit
  • Failed body control module (BCM)
  • Corroded terminals
  • Poor ground connection
  • Malfunctioning turn signal relay

Common misdiagnoses

  • Faulty turn signal switch
  • Defective body control module (BCM)
  • Wiring issues or shorts in the circuit
  • Malfunctioning hazard switch
  • Incorrectly diagnosed lighting issues
  • Battery or charging system problems
  • Grounding issues in the electrical system

Troubleshooting steps

  1. 1. Check the Owner's Manual

    Refer to the vehicle's service manual for specific information about the hazard flash output circuit and related components

  2. 2. Visual Inspection

  3. 3. Inspect the wiring and connectors associated with the hazard light switch and the hazard light relay for any signs of damage, corrosion, or loose connections

  4. 4. Check the fuse related to the hazard lights to ensure it is not blown

  5. 5. Test the Hazard Light Switch

  6. 6. Use a multimeter to test the continuity of the hazard light switch. If the switch is faulty, it may need to be replaced

  7. 7. Inspect the Hazard Light Relay

  8. 8. Locate the hazard light relay and test it for proper operation. You can swap it with a similar relay in the fuse box (if applicable) to see if the problem persists

  9. 9. Check for Short Circuits

  10. 10. Inspect the wiring for any shorts to ground or other circuits that could cause the hazard flash output circuit to fail

  11. 11. Scan for Additional Codes

  12. 12. Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

  13. 13. Test the Circuit

  14. 14. Using a multimeter, check the voltage and ground at the hazard light switch and relay. Ensure that the circuit is receiving the correct voltage and that the ground is solid

  15. 15. Inspect the Body Control Module (BCM)

  16. 16. If all other components check out, the issue may lie within the BCM, which controls the hazard lights. Testing or reprogramming the BCM may be necessary

  17. 17. Check for Software Updates

  18. 18. In some cases, a software update for the vehicle's control modules may resolve the issue. Check with the manufacturer or a dealership for any available updates

  19. 19. Consult a Professional

  20. 20. If you are unable to diagnose or fix the issue after these steps, it may be best to consult a professional mechanic or an automotive electrician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1753 code. Always ensure safety precautions are taken when working on electrical systems in vehicles