BIF 522426.04 – High Current Fault in Rear Window Wiper Relay. John Deere System Advisory.

BIF 522426.04 (BIF )

Code: 522426.04



Error code BIF 522426.04 is triggered when the High Frequency (HF) Power Module PC6 detects an abnormally high current of more than 1 amp at the rear window wiper relay output (lead 2026) while the relay is activated. This high current typically indicates a short to ground within the circuit, which can lead to potential overheating and damage to electrical components.


The power module will likely initiate a protective shutdown of the rear window wiper circuit to prevent damage due to the high current condition.


  • Inspect Wiring for Shorts: Thoroughly examine the wiring associated with lead 2026, looking for signs of damage, fraying, or exposure that could result in a short to ground.
  • Test Relay and Circuit Components: Use electrical testing tools to assess the relay and surrounding circuitry for faults. Replace the relay if it shows signs of malfunction or if it fails continuity tests.
  • Measure Current Levels: Confirm the exact current levels using a multimeter to better understand the severity of the overcurrent and help pinpoint the exact location of the short.
  • Replace Damaged Components: If specific components are identified as faulty or damaged during diagnostics, replace them to ensure the integrity of the circuit.
  • Reset Systems and Recheck: After repairs, reset the system to clear the error code. Re-test the rear window wiper system to ensure that the current levels are within safe operating parameters and that the system is functioning correctly.


Addressing electrical issues such as shorts promptly is crucial to prevent further damage to the electrical system and ensure the safe operation of vehicle features, especially those important for visibility like the rear window wiper. Regular maintenance and checks can help catch and resolve such issues before they lead to larger problems.

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