CRU 002850.05 – Low Current in Radio Antenna Circuit Detected. John Deere System Advisory.

CRU 002850.05 (CRU 2850.05)

Code: 002850.05

Shortcode: 2850.05


The error code CRU 002850.05 is triggered when the radio antenna circuit registers a current that is too low, indicating the presence of an open circuit. This issue suggests a break or disconnection within the circuit, which can impair the radio’s ability to receive or transmit signals effectively.


The control software may limit functionality or cease operations to prevent erratic behavior or further damage to the system, stemming from the insufficient current in the antenna circuit.


  • Inspect Antenna Wiring and Connections: Examine the antenna wiring thoroughly for any signs of breaks, disconnections, or wear that could lead to an open circuit. Check all connectors to ensure they are tight and corrosion-free.
  • Test Circuit Continuity: Use a multimeter to perform a continuity test on the antenna circuit. This will help identify the location of the open circuit within the wiring.
  • Repair or Replace Faulty Wiring: If an open circuit is identified, repair or replace the affected section of wiring to ensure current can flow adequately through the antenna circuit.
  • Verify Antenna Functionality: After making necessary repairs, test the antenna to ensure it is receiving and transmitting correctly, confirming the resolution of the issue.
  • Reset and Re-test the System: Clear any error codes and reset the control software. Conduct a full system check to ensure that all functionalities are restored and operating correctly.


Maintaining the integrity of the radio antenna circuit is essential for reliable communication and functionality of vehicle control systems. Regular inspections and prompt repairs of the electrical system can prevent issues such as low current, ensuring continuous and efficient operation of the vehicle’s electronics.

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