WOMS
B code body Medium severity

B1625 Lamp Keypad Output Short Circuit To Battery

The OBD2 code B1625 indicates a short circuit in the lamp keypad output circuit, which is causing it to connect directly to the battery, potentially leading to malfunctioning of the vehicle's lighting controls

Definition

The OBD2 code B1625 indicates a short circuit in the lamp keypad output circuit, which is causing it to connect directly to the battery, potentially leading to malfunctioning of the vehicle's lighting controls

Common causes

  • Shorted wiring or connectors
  • Faulty lamp keypad
  • Damaged control module
  • Corroded terminals
  • Grounding issues
  • Incorrect installation or modifications
  • Water intrusion or moisture damage

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Shorted wiring harness
  • Defective lamp or bulb
  • Malfunctioning switch or relay
  • Grounding issues
  • Corroded connectors
  • Incorrectly installed aftermarket accessories

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 any short circuits or exposed wires that may be touching the battery or other components

  2. 2. Inspect the Keypad

    Examine the keypad for any physical damage or signs of wear that could cause a short circuit

  3. 3. Check for Short Circuits

    Use a Multimeter: Set a multimeter to the continuity setting and check for continuity between the lamp keypad output and the battery. If there is continuity, it indicates a short circuit

  4. 4. Isolate the Circuit

    Disconnect the keypad and check the wiring harness for shorts. If the short disappears, the issue may be with the keypad itself

  5. 5. Test the Keypad

    Functionality Test: If possible, test the keypad to ensure it is functioning correctly. If the keypad is faulty, it may need to be replaced

  6. 6. Check for Faulty Components

    If the keypad has multiple functions, test each function to see if one specific part is causing the issue

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

    Check for Faulty BCM: The BCM may be malfunctioning and sending incorrect signals. Inspect the BCM for any signs of damage or corrosion

  8. 8. Reprogram or Reset the BCM

    Sometimes, reprogramming or resetting the BCM can resolve communication issues

  9. 9. 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 to the issue. Addressing other codes may resolve the B1625 code

  10. 10. Repair or Replace Components

    Repair Wiring: If any damaged wiring or connectors are found, repair or replace them as necessary

  11. 11. Replace Keypad or BCM

    If the keypad or BCM is determined to be faulty, replace the component and clear the codes

  12. 12. Clear Codes and Test Drive

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

  13. 13. Test Drive

    Take the vehicle for a test drive to see if the code reappears. Monitor the system to ensure everything is functioning correctly

  14. 14. Consult a Professional

    If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1625 code