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B codebodyMedium severity

B1735Mirror Driver Vertical Switch Circuit Short To Battery

The OBD2 code B1735 indicates a fault in the mirror driver vertical switch circuit, specifically that there is a short circuit to the battery, which means the circuit is receiving power continuously instead of being...

Definition

The OBD2 code B1735 indicates a fault in the mirror driver vertical switch circuit, specifically that there is a short circuit to the battery, which means the circuit is receiving power continuously instead of being controlled properly

Common causes

  • Shorted wiring or connectors
  • Faulty mirror switch
  • Damaged mirror motor
  • Corroded or damaged electrical connections
  • Malfunctioning body control module (BCM)
  • Incorrectly installed aftermarket accessories
  • Water intrusion or moisture damage

Common misdiagnoses

  • Faulty mirror switch
  • Wiring harness issues
  • Shorted wiring
  • Faulty mirror motor
  • Body control module (BCM) failure
  • Incorrectly installed or damaged mirror assembly
  • Grounding issues

Troubleshooting steps

  1. 1.Check for Additional Codes

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

  2. 2.Inspect the Wiring and Connectors

  3. 3.Visually inspect the wiring harness and connectors associated with the mirror switch and the mirror itself

  4. 4.Look for signs of damage, such as frayed wires, corrosion, or loose connections

  5. 5.Pay special attention to areas where the wiring may be exposed to heat or moisture

  6. 6.Test the Mirror Switch

  7. 7.Remove the mirror switch from the vehicle and test it with a multimeter

  8. 8.Check for continuity in the switch and ensure that it operates correctly in all positions

  9. 9.If the switch is faulty, replace it

  10. 10.Check for Short Circuits

  11. 11.Use a multimeter to check for continuity between the mirror switch circuit and the battery

  12. 12.If you find continuity where there shouldn't be any, trace the wiring to locate the short circuit

  13. 13.Inspect the Mirror Assembly

  14. 14.If the vehicle has power mirrors, inspect the mirror assembly for any signs of damage or malfunction

  15. 15.Check the motor and other components within the mirror assembly for proper operation

  16. 16.Check Ground Connections

  17. 17.Ensure that all ground connections related to the mirror switch and mirror assembly are secure and free of corrosion

  18. 18.A poor ground connection can cause electrical issues

  19. 19.Test the Power Supply

  20. 20.Verify that the mirror switch is receiving the correct voltage from the vehicle's electrical system

  21. 21.If the voltage is incorrect, check the fuses and relays associated with the mirror circuit

  22. 22.Clear the Code and Test Drive

  23. 23.After performing the necessary repairs, clear the trouble code using the OBD-II scanner

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

  25. 25.Consult a Professional

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or an automotive electrician for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1735 code