BCU 523751.06 – M08 Stepper Motor for Hitch (Coil 1), Current Too High. John Deere System Advisory.

BCU 523751.06 (BCU )

Code: 523751.06



Error code BCU 523751.06 is activated when the Basic Control Unit (BCU) of a John Deere vehicle detects that the current at the output to the stepper motor for the hitch (coil 1) on leads 7058 and 7059 is excessively high. This diagnostic trouble code typically indicates a short to ground within the circuit, which can lead to overheating, potential damage to the motor or electrical system, and even pose a fire hazard.


The excessive current may cause the stepper motor to operate inefficiently or fail, impacting the hitch’s ability to perform precision adjustments. This malfunction can significantly affect the tractor’s functionality, especially in tasks requiring precise hitch movements.


  • Inspect Wiring and Components: Examine the wiring and connections of coil 1 on the stepper motor for any signs of damage or deterioration that could contribute to a short circuit. Check for exposed wires, damaged insulation, or loose connections.
  • Measure Current and Test for Shorts: Use a clamp meter or multimeter to measure the current through leads 7058 and 7059 and test for continuity to ground, which will help in identifying the exact location and cause of the short.
  • Repair or Replace Faulty Components: If a short circuit is identified, repair the wiring or replace damaged components as necessary. Ensure all connections are secure and properly insulated to prevent future occurrences.
  • Check Stepper Motor Integrity: Assess the condition of the stepper motor itself, as internal motor faults can also cause high current draw. Replace the motor if it shows signs of damage or malfunction.
  • Reset the BCU: After addressing the issue, reset the BCU to clear the fault code and reinitialize the system. This ensures that the system recognizes the repairs and functions correctly.
  • Test Hitch Operation: Perform operational tests to ensure the stepper motor and hitch are functioning properly. Confirm that the motor responds appropriately to control inputs without abnormal current draw.
  • Implement Regular Maintenance Checks: Schedule regular inspections and maintenance for the hitch system and its electrical components. Proactive maintenance helps prevent similar issues and ensures continuous, reliable operation.


Regular maintenance and immediate attention to electrical issues are crucial for maintaining the operational integrity and safety of agricultural equipment. Ensuring that all components, especially those involved in critical functions like hitch operation, are in optimal condition helps avoid unplanned downtime and maximizes the equipment’s operational life and efficiency.