BIF 523909.05 – Open Circuit Fault in Right Headlight (Dipped Beam) on Cab Frame. John Deere System Advisory.

BIF 523909.05 (BIF )

Code: 523909.05



Error code BIF 523909.05 is triggered when the Power Module PC0 detects a current of less than 350 mA at the output for the right headlight (E08) on the cab frame (lead 1084) when the dipped beam headlights are switched on. This low current condition indicates that the circuit is open, preventing the headlight from receiving the necessary power to operate.


Due to the open circuit, the right headlight (dipped beam) may fail to operate, potentially reducing visibility and safety during low-light conditions.


  • Inspect Wiring and Connectors: Check the wiring and connectors associated with lead 1084 for any signs of disconnection, damage, or wear that might be causing the open circuit.
  • Test for Continuity: Use a continuity tester to check the integrity of the circuit. This will help identify where the circuit is broken or open.
  • Repair or Replace Faulty Wiring: If a break or disconnection is found within the circuit, repair the damaged section or replace the faulty wiring to restore proper function.
  • Check Headlight and Relay: Ensure that the right headlight (E08) and any associated relays are functioning correctly and are properly connected.
  • Evaluate Power Module PC0: Confirm that the Power Module PC0 is functioning correctly and providing the appropriate power output. Repair or replace the module if necessary.
  • System Reset and Test Operation: After any necessary repairs are made, reset the system to clear the diagnostic code. Test the right headlight (dipped beam) operation to ensure it functions correctly.


Regular maintenance of the headlight system is essential to ensure safety and operational readiness, especially during low-light conditions. Addressing any signs of malfunction promptly can help avoid visibility issues while driving, thereby enhancing safety and comfort for the vehicle’s operator and passengers.

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