WOMS
B code body Medium severity

B1241 Wiper Washer Rear Pump Relay Circuit Short to Battery

The OBD2 code B1241 indicates a short circuit in the rear wiper washer pump relay circuit, meaning the circuit is receiving power directly from the battery instead of functioning normally

Definition

The OBD2 code B1241 indicates a short circuit in the rear wiper washer pump relay circuit, meaning the circuit is receiving power directly from the battery instead of functioning normally

Common causes

  • Shorted wiring or connectors
  • Faulty rear wiper washer pump relay
  • Malfunctioning rear wiper washer pump
  • Corroded or damaged electrical connections
  • Faulty body control module (BCM)
  • Incorrectly installed or damaged fuses

Common misdiagnoses

  • Faulty rear wiper motor
  • Defective wiper switch
  • Wiring issues or shorts in the harness
  • Malfunctioning body control module (BCM)
  • Incorrectly installed or damaged relay
  • Issues with the front wiper system affecting the rear
  • Low washer fluid level or blockage in the system

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information regarding the rear wiper washer system, including wiring diagrams and relay locations

  2. 2. Visual Inspection

    Inspect Wiring and Connectors: Look for any damaged, frayed, or corroded wires and connectors in the rear wiper washer pump circuit. Pay special attention to areas where the wiring may be exposed to moisture or physical damage

  3. 3. Check the Relay

    Locate the rear wiper washer pump relay and inspect it for any signs of damage or corrosion

  4. 4. Test the Relay

    Remove the Relay: Take out the relay and inspect the terminals for corrosion or damage

  5. 5. Test the Relay

    Use a multimeter to check the relay's functionality. You can perform a continuity test to ensure it opens and closes properly when energized

  6. 6. Check for Short Circuits

    Inspect for Shorts: Use a multimeter to check for continuity between the relay circuit and the battery. A short circuit may indicate that the wiring is damaged or that there is a fault in the system

  7. 7. Check Ground Connections

    Ensure that the ground connections for the rear wiper washer pump are secure and free of corrosion

  8. 8. Test the Rear Wiper Washer Pump

    Direct Power Test: Apply direct power to the rear wiper washer pump to see if it operates. If it does not work, the pump may be faulty and needs replacement

  9. 9. Check for Blockages

    Ensure that the washer fluid lines are not clogged or blocked

  10. 10. Inspect the Fuse

    Check the Fuse: Locate the fuse associated with the rear wiper washer system and check if it is blown. Replace it if necessary and see if the code returns

  11. 11. Scan for Additional Codes

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

  12. 12. Clear the Code

    After performing the above checks and repairs, clear the trouble code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  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.Conclusion By following these troubleshooting steps, you should be able to identify the cause of the B1241 code and take appropriate action to resolve the issue. Always ensure safety precautions are taken when working on electrical systems in vehicles