PLC 328051.31 – K07/02 or K03/02 Park Lock Alarm, Shorted Circuit

PLC 328051.31 (PLC )

Code: 328051.31



This diagnostic trouble code is stored when the alarm’s power supply line is shorted to the signal line or to ground. K07/02 alarm is used on tractors up to Serial Number Break 2008, and K03/02 alarm is used on tractors from Serial Number Break 2008.


The park lock alarm may fail to function correctly, potentially compromising the operator’s awareness of park lock status.


  • Inspect Wiring and Connections:
    • Check for any signs of damage, corrosion, or loose connections in the power supply and signal lines. Repair or replace as necessary.
  • Check for Shorts:
    • Inspect the circuit for any shorts between the power supply line and the signal line or ground. Rectify any issues found.
  • Test Alarm Units:
    • Verify the operation of the K07/02 or K03/02 park lock alarms. Replace if necessary.
  • Secure Connections:
    • Ensure all connections are secure and free from contamination.


Regular inspections and prompt repairs of wiring and connections can prevent short circuit issues, ensuring reliable operation of the park lock alarm system.

Control Units: John Deere

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