Title: BIF 522427.00 – Overcurrent Fault in Windshield Wiper Relay Circuit. John Deere System Advisory.

Code: 522427.00



Error code BIF 522427.00 is triggered when the Power Module PC0 detects a current exceeding 40 amps at outputs A1, B1, and C1, specifically linked to the windshield wiper system. This diagnostic trouble code specifically relates to the K06/04 or K02/04 relay for the windshield wiper. The excessive current typically indicates a short to ground or a defective component within one of these monitored circuits. This fault is part of a broader diagnostic context that may also impact the wiper’s fast and slow settings, which are associated with additional trouble codes.


The power module activates current overload protection to prevent further damage, potentially disabling the windshield wiper system to mitigate any risk of electrical hazards.


  • Inspect Wiring and Connections: Check all associated wiring and connections for the K06/04 or K02/04 relay and related outputs. Look for signs of damage, corrosion, or loose connections that could contribute to a short circuit.
  • Test for Short Circuits: Using electrical testing tools, check for shorts to ground in the circuits connected to outputs A1, B1, and C1. Focus particularly on the circuits related to the windshield wiper’s fast and slow functions.
  • Replace Defective Components: If any components like the relay or wiring are found to be defective, replace them to resolve the overcurrent issue.
  • Evaluate Power Module PC0: Ensure that the Power Module PC0 is functioning correctly and not contributing to the issue by incorrectly measuring or responding to the current flow.
  • Reset Systems and Recheck: After repairs are completed, reset the affected systems to clear any fault codes. Test thoroughly to ensure all functionalities are restored and operating safely without triggering further overcurrent protection.


Regular monitoring and maintenance of the vehicle’s electrical systems and their components are crucial for preventing such issues. Addressing electrical faults promptly helps ensure the reliability and safety of vehicle operations, particularly in systems critical for visibility like the windshield wiper circuit.

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