B1244 – Wiper Rear Motor Run Relay Circuit Failure

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The ODBII 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.

The severity of ODBII code B1244 is moderate.

Common Causes For: B1243 Express Window Down Switch Circuit Short to Battery

  • 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 misdiagnosis for B1244 Wiper Rear Motor Run Relay Circuit Failure

  • 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

Common Troubleshooting Steps

The OBD-II code B1244 indicates a problem with the rear wiper motor run relay circuit. This code can be triggered by various issues, including electrical problems, faulty components, or wiring issues. Here are some common troubleshooting steps to diagnose and resolve the problem:

  • 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.
  • Visual Inspection: Inspect the rear wiper motor and relay for any visible signs of damage, corrosion, or loose connections.
  • Check the wiring harness for frayed wires, broken connectors, or any signs of wear.
  • 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.
  • 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.
  • Use a multimeter to check for continuity and proper operation of the relay.
  • 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.
  • 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.
  • If there is no power, trace the wiring back to the relay and check for continuity.
  • Check the Wiper Switch: The issue may also lie with the wiper switch itself. Test the switch for proper operation and continuity when activated.
  • Scan for Additional Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue.
  • Inspect Ground Connections: Ensure that all ground connections related to the rear wiper motor and relay are clean and secure.
  • 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.

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