WOMS
B code body Medium severity

B1244 Wiper Rear Motor Run Relay Circuit Failure

The OBD2 code B1244 indicates a malfunction in the rear wiper motor run relay circuit, suggesting a failure in the relay that controls the operation of the rear wiper motor

Definition

The OBD2 code B1244 indicates a malfunction in the rear wiper motor run relay circuit, suggesting a failure in the relay that controls the operation of the rear wiper motor

Common causes

  • Faulty rear wiper motor
  • Defective wiper relay
  • Wiring issues (shorts or open circuits)
  • Corroded or loose connectors
  • Blown fuse
  • Malfunctioning body control module (BCM)
  • Grounding issues

Common misdiagnoses

  • Faulty rear wiper motor
  • Bad wiper switch
  • Wiring issues or shorts in the harness
  • Defective body control module (BCM)
  • Incorrectly diagnosed as a front wiper issue
  • Battery or charging system problems
  • Corroded or loose connectors
  • Faulty relay unrelated to the rear wiper circuit

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information regarding the rear wiper motor and relay circuit. This will provide wiring diagrams and component locations

  2. 2. Visual Inspection

    Inspect the rear wiper motor and relay for any visible signs of damage, corrosion, or loose connections

  3. 3. Check the wiring harness for frayed wires, broken connectors, or any signs of wear

  4. 4. Test the Rear Wiper Motor

    Disconnect the rear wiper motor connector and test the motor directly by applying power to it. If the motor does not operate, it may be faulty and need replacement

  5. 5. Check the Relay

    Locate the rear wiper relay (usually found in the fuse box) and test it. You can swap it with a similar relay in the fuse box to see if the problem persists

  6. 6. Use a multimeter to check for continuity and proper operation of the relay

  7. 7. Inspect the Fuse

    Check the fuse associated with the rear wiper motor circuit. If the fuse is blown, replace it and see if the issue is resolved

  8. 8. Test the Power and Ground

    Use a multimeter to check for power and ground at the rear wiper motor connector when the wiper switch is activated. Ensure that the motor is receiving the correct voltage

  9. 9. If there is no power, trace the wiring back to the relay and check for continuity

  10. 10. Check the Wiper Switch

    The issue may also lie with the wiper switch itself. Test the switch for proper operation and continuity when activated

  11. 11. Scan for Additional Codes

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

  12. 12. Inspect Ground Connections

    Ensure that all ground connections related to the rear wiper motor and relay are clean and secure

  13. 13. Consult a Professional

    If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who can perform more advanced diagnostics. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1244 code