HCC 521000.02 – Rear Hitch External Switch Circuit Fault

HCC 521000.02 (HCC 521000.02)

Code: 521000.02

Shortcode: 521000.02


This error code indicates a failure in the Rear Hitch External Switch circuit. This can be due to a malfunction in the external switch or an issue with the circuit.


The HCC function is degraded when this error code is active.


  • Inspect the External Switch:
    • Check the rear hitch external switch for any signs of damage or wear. Replace if necessary.
  • Examine Wiring and Connections:
    • Inspect the wiring and connections to the external switch for any loose connections, corrosion, or damage.
  • Test the Circuit:
    • Verify that the circuit associated with the external switch is functioning correctly.
  • Consult Technical Support:
    • If the issue persists after these checks, contact technical support for further diagnostics and troubleshooting.


Regular maintenance of the external switch and its circuit can prevent faults and ensure reliable operation.

Control Units: John Deere

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