AIC 520286.04 – Armrest Hitch Controls Module Voltage Low. John Deere AIC System Alert.

AIC 520286.04 (AIC )

Code: 520286.04



This error code, AIC 520286.04, indicates that the output voltage from the armrest hitch controls module is abnormally low, with sensor input voltage falling below 0.5 volts. This significant drop typically points to a short to ground within the module’s circuitry, which can disrupt normal operations and potentially damage the system.


Due to the low voltage condition, the control unit has disabled the functionality of the hitch controls to prevent any erratic behavior or further electrical issues.


  • Inspect the armrest hitch controls module for any signs of electrical shorts. Pay special attention to the wiring and circuit components that could be causing a direct connection to ground.
  • Use a multimeter to measure the output voltage levels from the module to confirm that they are below the operational threshold, and identify where the voltage drop occurs.
  • Check for damaged wires, loose connections, or corroded terminals that could contribute to the voltage issue. Repair or replace any faulty components as needed.
  • After repairing the immediate issues, consider checking the entire hitch control system for any secondary problems that might have arisen from the voltage irregularity.
  • Once all necessary repairs and checks are completed, reset the module and recalibrate the system settings to ensure that all functions are restored and operating within the correct voltage parameters.


Maintaining stable voltage levels within control modules is critical for the safe and effective operation of machinery. Routine checks and immediate action upon detecting any electrical abnormalities are essential to prevent long-term damage and ensure that all system components function reliably.