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

The ODBII 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.

The severity of ODBII code B1248 is moderate.

Common Causes For: B1248 Passenger’s Seatback Autoglide Rearward Switch Circuit Short to Ground

• Damaged wiring or connectors
• Shorted switch
• Faulty seatback autoglide switch
• Corroded terminals
• Grounding issues
• Malfunctioning seat control module
• Improper installation or modifications

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

• Faulty seat switch
• Wiring harness issues
• Shorted seat control module
• Malfunctioning power seat motor
• Defective body control module (BCM)
• Grounding issues in the circuit
• Incorrectly installed or damaged seat components

Common Troubleshooting Steps

When dealing with an OBD-II code like B1248, which indicates a problem with the passenger’s seatback autoglide rearward switch circuit short to ground, there are several common troubleshooting steps you can follow:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information about the B1248 code, including wiring diagrams and component locations.
• Visual Inspection: Inspect the wiring and connectors associated with the passenger’s seat and the autoglide switch. Look for:
• Damaged, frayed, or corroded wires.
• Loose or disconnected connectors.
• Signs of moisture or dirt that could cause a short.
• Test the Switch: Use a multimeter to test the passenger’s seatback autoglide switch for proper operation. Check for continuity and ensure that the switch is functioning correctly.
• Check for Shorts to Ground: With the multimeter, check the wiring harness for any shorts to ground. Disconnect the switch and measure resistance between the switch terminals and ground. A low resistance reading indicates a short.
• Inspect the Seat Mechanism: Sometimes, the seat mechanism itself can cause issues. Ensure that the seat is not obstructed and that all moving parts are functioning properly.
• 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.
• Check the Body Control Module (BCM): If the wiring and switch are in good condition, the issue may lie within the BCM. Check for any faults or updates related to the BCM.
• Repair or Replace Components: Based on your findings, repair any damaged wiring or connectors. If the switch is faulty, replace it. If the BCM is at fault, consider reprogramming or replacing it.
• Clear the Codes and Test Drive: After making repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional: If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with automotive electrical systems.Safety Precautions – Always disconnect the battery before working on electrical components to avoid shorts or shocks. – Be cautious when working with airbags and seatbelt systems, as they can be sensitive and potentially dangerous. By following these steps, you should be able to diagnose and potentially resolve the issue related to the B1248 code.