JDL 299620.31 – GPS Antenna/Cable Fault

JDL 299620.31 (JDL )

Code: 299620.31



This diagnostic trouble code, JDL 299620.31, is triggered when a short circuit or an interruption is detected at the GPS antenna or GPS cable. This indicates a physical issue with the GPS hardware components.


When this error code is triggered, the equipment may lose GPS functionality, affecting navigation, tracking, and any operations dependent on GPS data.


Inspect GPS Antenna and Cable:

  • Perform a visual inspection of the GPS antenna and cable for any signs of damage, such as cuts, abrasions, or pinching.
  • Ensure that the antenna is properly positioned and has a clear view of the sky.

Check Connections:

  • Verify that all connections between the GPS antenna and the control unit are secure and free from debris or corrosion.

Test Continuity:

  • Use a multimeter to test the continuity of the GPS cable. Replace the cable if a break or short circuit is detected.

Replace Damaged Components:

  • Replace the GPS antenna or cable if any physical damage is found that cannot be repaired.

Consult Technical Support:

  • If the issue persists after performing the above steps, consult the manufacturer’s technical support for further assistance.
  • Provide the diagnostic trouble code and any relevant information gathered during the inspection.


Physical issues with the GPS antenna or cable can severely impact GPS functionality. Regular inspection and maintenance of these components can help ensure reliable operation.

Control Units: John Deere

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