WOMS
B code body Medium severity

B1424 Power Window RR Motor Circuit Short To Battery

The OBD2 code B1424 indicates a short circuit in the power window rear right motor circuit, meaning there is an unintended connection to the battery, which can cause the motor to malfunction

Definition

The OBD2 code B1424 indicates a short circuit in the power window rear right motor circuit, meaning there is an unintended connection to the battery, which can cause the motor to malfunction

Common causes

  • Shorted wiring or connectors
  • Faulty power window motor
  • Damaged window switch
  • Grounding issues
  • Corroded or damaged electrical connections
  • Malfunctioning body control module (BCM)

Common misdiagnoses

  • Faulty power window switch
  • Damaged wiring harness
  • Defective window motor
  • Malfunctioning body control module (BCM)
  • Short circuit in the door panel
  • Issues with the fuse or relay
  • Incorrectly installed aftermarket accessories

Troubleshooting steps

  1. 1. Visual Inspection

    Wiring and Connectors: Check the wiring harness and connectors related to the rear right power window motor for any signs of damage, fraying, or corrosion

  2. 2. Ground Connections

    Ensure that all ground connections are secure and free of corrosion

  3. 3. Check the Power Window Switch

    Functionality: Test the power window switch for proper operation. A faulty switch can cause incorrect signals to be sent to the motor

  4. 4. Continuity Test

    Use a multimeter to check for continuity in the switch when pressed

  5. 5. Inspect the Power Window Motor

    Motor Condition: Test the rear right power window motor for functionality. You can do this by applying direct battery voltage to the motor to see if it operates

  6. 6. Resistance Check

    Measure the resistance of the motor windings. If the resistance is too low (indicating a short), the motor may need to be replaced

  7. 7. Check for Short Circuits

    Wiring Inspection: Look for any signs of short circuits in the wiring leading to the rear right power window motor. This includes checking for pinched wires or wires that may be touching the vehicle chassis

  8. 8. Use a Multimeter

    Measure resistance between the power wire and ground to check for shorts

  9. 9. Inspect the Power Supply

    Voltage Check: Use a multimeter to check the voltage at the power window motor connector. Ensure that it is receiving the correct voltage when the switch is activated

  10. 10. Fuses and Relays

    Check the relevant fuses and relays in the power window circuit. Replace any blown fuses and test relays for proper operation

  11. 11. Scan for Additional Codes

    Check for Other 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 and Test Drive

    Reset the System: After performing the above checks and repairs, clear the trouble code using an OBD-II scanner

  13. 13. Test Drive

    Operate the power window to see if the issue persists and if the code returns

  14. 14. Consult Repair Manual

    Manufacturer Specifications: If the problem persists, consult the vehicle’s repair manual for specific diagnostic procedures and specifications related to the power window system

  15. 15. Professional Help

    Seek Assistance: If you are unable to resolve the issue after these steps, consider seeking help from a professional mechanic or automotive technician. By following these steps, you should be able to identify the cause of the B1424 code and take appropriate action to fix the issue