WOMS
B code body Medium severity

B1248 Passenger’s Seatback Autoglide Rearward Switch Circuit Short to Ground

The OBD2 code B1248 indicates a short circuit to ground in the passenger's seatback autoglide rearward switch circuit, which may affect the operation of the seat adjustment feature

Definition

The OBD2 code B1248 indicates a short circuit to ground in the passenger's seatback autoglide rearward switch circuit, which may affect the operation of the seat adjustment feature

Common causes

  • Damaged wiring or connectors
  • Faulty switch
  • Short circuit in the wiring harness
  • Corroded connections
  • Malfunctioning seat control module
  • Improper installation or modifications
  • Water intrusion or moisture damage

Common misdiagnoses

  • Faulty seat switch
  • Wiring issues or shorts in the harness
  • Malfunctioning seat control module
  • Issues with the power supply or ground connections
  • Problems with the body control module (BCM)
  • Incorrectly diagnosed airbag or restraint system faults
  • Misinterpretation of related codes or symptoms

Troubleshooting steps

  1. 1. Verify the Code

    Use an OBD-II scanner to confirm the presence of the B1248 code. Clear the code and see if it returns after a short drive

  2. 2. Inspect the Wiring and Connectors

  3. 3. Check the wiring harness and connectors associated with the passenger seat and the autoglide switch. Look for any signs of damage, fraying, or corrosion

  4. 4. Pay special attention to areas where the wiring may be pinched or exposed to moisture

  5. 5. Check the Switch

  6. 6. Test the passenger seatback autoglide switch for proper operation. Use a multimeter to check for continuity and ensure that the switch is functioning correctly

  7. 7. If the switch is faulty, it may need to be replaced

  8. 8. Inspect the Seat Module

  9. 9. If the vehicle has a seat control module, check for any faults or issues with the module itself. This may involve checking for proper power and ground at the module

  10. 10. Look for any signs of water intrusion or damage to the module

  11. 11. Test for Short to Ground

  12. 12. Use a multimeter to check for continuity between the switch circuit and ground. If you find continuity where there shouldn't be any, you likely have a short to ground somewhere in the wiring

  13. 13. Trace the wiring back to find the source of the short

  14. 14. Check for Other Codes

  15. 15. Look for any other related trouble codes that may provide additional context or indicate a broader issue with the seat or airbag system

  16. 16. Inspect Related Components

  17. 17. If applicable, check other components related to the seat adjustment system, such as motors or relays, for proper operation

  18. 18. Repair or Replace Faulty Components

  19. 19. Based on your findings, repair any damaged wiring, replace faulty switches, or address issues with the seat module as necessary

  20. 20. Clear Codes and Test Drive

  21. 21. After making repairs, clear the codes and take the vehicle for a test drive to see if the code returns

  22. 22. If the issue persists, consult the vehicle's service manual for specific wiring diagrams and troubleshooting procedures related to the passenger seat and autoglide system. If you're not comfortable performing these steps or if the issue remains unresolved, it may be best to consult a professional mechanic for further diagnosis and repair