BIF 522427.01 – Low Voltage Supply Fault in Windshield Wiper Relay. John Deere System Advisory.

BIF 522427.01 (BIF )

Code: 522427.01



Error code BIF 522427.01 is activated when the Power Module PC0 detects a voltage of less than 3 volts at the relay output (lead 0772) that supplies power to the windshield wiper, while the wiper is switched on. This low voltage condition suggests a fault in the power supply system, potentially due to issues such as poor wiring connections, a degraded relay, or an underperforming power module.


The low voltage condition may lead to insufficient power to operate the windshield wiper effectively, potentially resulting in reduced or non-functional wiper operation, which can impair visibility during adverse weather conditions.


  • Inspect and Test Power Supply Wiring: Check the wiring and connections associated with lead 0772 for any signs of damage, wear, or loose connections that might be causing the low voltage issue.
  • Evaluate Relay and Connectors: Examine the K06/04 or K02/04 relay and its connectors for faults or degradation that could contribute to voltage drop. Replace the relay if it is found to be defective.
  • Check Voltage at Power Module PC0: Measure the voltage output from the Power Module PC0 to ensure it is providing adequate power to the relay. If the module is found to be at fault, it may need repair or replacement.
  • System Reset and Voltage Recheck: After making any repairs or replacements, reset the system to clear the diagnostic trouble code. Recheck the voltage supply to the windshield wiper relay to ensure it is now within the correct range.
  • Comprehensive Electrical Diagnostics: Conduct thorough diagnostics on the entire circuit to ensure no additional electrical issues are present that could affect the operation of the windshield wiper.


Maintaining the electrical integrity of vehicle systems is crucial for proper functionality and safety. Regular inspections and prompt resolution of voltage supply issues are important for the longevity and reliability of the windshield wiper system, especially in adverse weather conditions where visibility is critical.

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