WOMS
B code body Medium severity

B1416 Power Window LR Motor Circuit Short To Battery

The OBD2 code B1416 indicates a short circuit in the left rear power window motor circuit, meaning there is an unintended connection to the battery voltage, which can cause the motor to malfunction

Definition

The OBD2 code B1416 indicates a short circuit in the left rear power window motor circuit, meaning there is an unintended connection to the battery voltage, 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
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty power window switch
  • Defective window motor
  • Wiring harness issues
  • Blown fuse
  • Body control module (BCM) failure
  • Ground connection problems
  • Incorrectly installed window regulator

Troubleshooting steps

  1. 1. Visual Inspection

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

  2. 2. Ground Connections

    Ensure that the 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 a short circuit

  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: Check the left rear power window motor for any signs of damage or wear

  6. 6. Bench Test

    If possible, remove the motor and bench test it by applying direct battery voltage to see if it operates correctly

  7. 7. Check for Short Circuits

    Wiring Inspection: Look for any pinched or damaged wires that may be causing a short to battery

  8. 8. Multimeter Testing

    Use a multimeter to check for continuity between the power window motor circuit and the battery positive terminal. A reading indicates a short

  9. 9. Inspect the Window Regulator

    Regulator Condition: Check the window regulator for any binding or mechanical issues that could cause the motor to draw excessive current

  10. 10. Free Movement

    Ensure that the window moves freely up and down without obstruction

  11. 11. Check Fuses and Relays

    Fuses: Inspect the fuses related to the power window system for any blown fuses

  12. 12. Relays

    If applicable, check the relays for the power window system to ensure they are functioning properly

  13. 13. Scan for Additional Codes

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

  14. 14. Clear Codes and Test Drive

    Clear Codes: After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner

  15. 15. Test Drive

    Take the vehicle for a test drive and operate the power window to see if the code returns

  16. 16. Consult Repair Manual

    If the issue persists, consult the vehicle’s repair manual for specific wiring diagrams and troubleshooting procedures related to the power window system

  17. 17. Seek Professional Help

    If you are unable to resolve the issue after following these steps, it may be best to consult a professional mechanic for further diagnosis and repair. By following these steps, you should be able to identify the cause of the B1416 code and take appropriate action to fix the issue