CRU 002850.06 – High Current Detected in Radio Antenna Circuit. John Deere System Advisory.

CRU 002850.06 (CRU 2850.06)

Code: 002850.06

Shortcode: 2850.06


Error code CRU 002850.06 indicates that the radio antenna circuit is experiencing a current level that is too high, typically caused by a short to ground. This excessive current can lead to potential damage in the radio system and associated components, resulting in impaired functionality or total failure of the radio unit.


The control software will limit or disable functionality to prevent further damage or erratic operations due to the high current condition in the antenna circuit.


  • Inspect Antenna Circuit for Shorts: Thoroughly check the antenna circuit for any signs of shorts to ground. Pay close attention to areas where wiring might be damaged, frayed, or improperly connected.
  • Measure Current Levels: Use a multimeter to measure the current in the antenna circuit to confirm the presence of high current and to identify the exact location of the short.
  • Repair or Replace Damaged Wiring: If a short to ground is detected, repair the affected wiring or replace it to eliminate the short circuit. Ensure that all repairs are securely insulated to prevent future shorts.
  • Check Ground Connections: Verify that all ground connections in the antenna circuit are secure and free of corrosion or damage. Proper grounding is essential for maintaining correct current levels.
  • Test Antenna Functionality: After repairs, test the antenna to ensure that it is operating correctly and that the current levels are within the specified range.
  • Reset and Re-test the System: Clear the error codes and reset the control software. Conduct a comprehensive system test to confirm that the issue has been resolved and that all functionalities are restored.


Regular inspection and maintenance of the vehicle’s electrical and antenna systems are crucial for preventing high current issues and ensuring reliable operation. Addressing high current conditions promptly helps avoid long-term damage and ensures the longevity and effectiveness of the radio and control systems.

Control Units: John Deere

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