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B code body Medium severity

B1626 Lamp Keypad Output Short Circuit To Ground

The OBD2 code B1626 indicates a short circuit in the lamp keypad output circuit, causing it to connect directly to ground, which can affect the operation of the vehicle's lighting controls

Definition

The OBD2 code B1626 indicates a short circuit in the lamp keypad output circuit, causing it to connect directly to ground, which can affect the operation of the vehicle's lighting controls

Common causes

  • Damaged wiring or connectors
  • Shorted or faulty lamp keypad
  • Corroded connections
  • Faulty body control module (BCM)
  • Grounding issues
  • Water intrusion or moisture damage
  • Incorrect installation or modifications

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Damaged wiring or connectors
  • Shorted or damaged lamp keypad
  • Incorrectly installed or malfunctioning dashboard components
  • Issues with the vehicle's lighting system
  • Faulty ground connections
  • Software or programming errors in the BCM

Troubleshooting steps

  1. 1. Visual Inspection

    Check Wiring and Connectors: Inspect the wiring harness and connectors related to the lamp keypad for any signs of damage, fraying, or corrosion. Look for loose connections or broken wires

  2. 2. Inspect the Lamp Keypad

    Examine the lamp keypad itself for any physical damage or signs of wear

  3. 3. Check for Short Circuits

    Use a Multimeter: With the vehicle off, use a multimeter to check for continuity between the lamp keypad output wire and ground. If there is continuity, it indicates a short circuit

  4. 4. Trace the Wiring

    Follow the wiring from the lamp keypad to the BCM, checking for any points where the wire may be pinched or damaged

  5. 5. Test the Lamp Keypad

    Functionality Test: If possible, test the lamp keypad to ensure it is functioning correctly. You may need to use a scan tool to check for any additional codes or to see if the keypad is responding as expected

  6. 6. Replace if Necessary

    If the lamp keypad is found to be faulty, consider replacing it

  7. 7. Check the Body Control Module (BCM)

    Inspect the BCM: Check the BCM for any signs of damage or corrosion. Ensure that all connections are secure

  8. 8. Scan for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes that may provide more context to the issue

  9. 9. Clear Codes and Test Drive

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

  10. 10. Test Drive

    Take the vehicle for a test drive to see if the code reappears. Monitor the operation of the lamp keypad during the drive

  11. 11. Seek Professional Help

    Professional Diagnosis: If you are unable to resolve the issue, consider seeking help from a professional mechanic or an automotive technician who has experience with electrical systems. By following these steps, you should be able to identify and resolve the issue related to the B1626 code. Always ensure safety precautions are taken when working with electrical systems in vehicles