RLC 003976.05 – Dome Light, Current Too Low

RLC (RLC 3976.05)


Shortcode: 3976.05


This diagnostic trouble code is generated if the control software registers that the current at the output to the dome light is too low. This indicates that the circuit is open.


When this error is detected, the control software may experience limited or no functionality of the dome light.


  • Inspect Dome Light Circuit:
    • Check the wiring and connectors associated with the dome light for signs of open circuits. Look for disconnected or loose connections. Repair or replace any compromised wiring or connectors.
  • Test Dome Light:
    • Test the dome light to ensure it is functioning correctly and drawing the proper current. Replace any faulty light components.
  • Verify Power Supply:
    • Ensure the power supply to the dome light is stable and within the specified range. Inspect for any issues that could cause a drop in current.


An open circuit can prevent the dome light from functioning properly. Regular inspection and maintenance of the electrical system are essential to ensure reliable operation.

Control Units: John Deere

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