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B codebodyMedium severity

B1447Wiper Park Sense Circuit Open

The OBD2 code B1447 indicates a malfunction in the Wiper Park Sense Circuit, specifically that the circuit is open, meaning there is a break in the electrical connection that affects the wiper park function

Definition

The OBD2 code B1447 indicates a malfunction in the Wiper Park Sense Circuit, specifically that the circuit is open, meaning there is a break in the electrical connection that affects the wiper park function

Common causes

  • Faulty wiper park switch
  • Damaged wiring or connectors
  • Corroded terminals
  • Malfunctioning wiper motor
  • Failed body control module (BCM)
  • Poor ground connection

Common misdiagnoses

  • Faulty windshield wiper motor
  • Bad wiper switch
  • Damaged wiring or connectors
  • Malfunctioning body control module (BCM)
  • Incorrectly installed wiper assembly
  • Faulty rain sensor (if equipped)
  • Issues with the vehicle's electrical system

Troubleshooting steps

  1. 1.Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information about the wiper park sense circuit and wiring diagrams

  2. 2.Visual Inspection

  3. 3.Inspect the wiper motor and its connectors for any signs of damage, corrosion, or loose connections

  4. 4.Check the wiring harness for any frayed wires, breaks, or shorts that could cause an open circuit

  5. 5.Test the Wiper Motor

  6. 6.Use a multimeter to check the resistance of the wiper motor. If the motor is faulty, it may need to be replaced

  7. 7.Ensure that the wiper motor is receiving power when the wipers are activated

  8. 8.Check the Wiper Switch

  9. 9.Test the wiper switch for proper operation. A malfunctioning switch can cause issues with the wiper park sense circuit

  10. 10.Inspect the wiring and connectors associated with the wiper switch

  11. 11.Inspect the Ground Connections

  12. 12.Ensure that all ground connections related to the wiper system are clean, tight, and free of corrosion. A poor ground can lead to circuit issues

  13. 13.Scan for Additional Codes

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

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

  16. 16.The BCM may control the wiper park function. If other components are functioning correctly, the BCM may need to be tested or reprogrammed

  17. 17.Perform a Continuity Test

  18. 18.With the vehicle off, perform a continuity test on the wiper park sense circuit to ensure there are no breaks in the wiring

  19. 19.Clear the Code and Test Drive

  20. 20.After performing repairs or adjustments, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  21. 21.Consult a Professional

  22. 22.If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify and resolve the issue related to the B1447 code