John Deere 002350.05 – RLC: Low Amps Detected at Headlight Low Beam Pin on Module

The Roof Lighting Control Unit (RLC) or Cab Load Center (CLC) has detected that the electrical current in the low beam headlight circuit is below the expected operational range when the headlights are turned on. This is most commonly caused by a blown headlight bulb with a broken filament preventing current flow, or high resistance in a connector.

• 6R Series
• 7R Series
• 8R Series
• 9R Series
• 9RT Series
• 9RX Series
• Compact Utility Tractors

1. 1

   Cycle the ignition switch off and on to see if the code clears, as many lighting faults can be reset by a power cycle.

2. 2

   Visually inspect the low-beam headlights to identify if a bulb is blown or not illuminating (most common cause).

3. 3

   Inspect the bulb's electrical connector and socket for signs of corrosion or damage that could cause high resistance.

4. 4

   Inspect the wiring harness leading to the headlight for visible damage, chafing, or loose connections.

5. 5

   Check related fuses and relays for the lighting circuit.

6. 6

   Test the alternator for overcharging (voltage above 15V), which can cause bulbs to fail frequently.

1. 1

   Identify and Inspect the Faulty Bulb

   Visually inspect the low-beam headlights to determine which one is not illuminated.

2. 2

   Access the Headlight Assembly

   Raise the tractor's hood. On some models, side screen panels may also need to be removed to access the rear of the headlight assembly.

3. 3

   Disconnect and Remove the Bulb

   Disconnect the wiring harness plug from the back of the bulb assembly and remove the rubber or plastic dust boot, if equipped. Unlatch the retaining spring or rotate the bulb socket counterclockwise to release it from the headlight housing, then carefully remove the old bulb.

4. 4

   Install the New Bulb

   Insert the new bulb into the housing, ensuring it is correctly seated. Do not touch the glass of a halogen bulb with bare hands; use a clean cloth or gloves to prevent hot spots. Secure the retaining spring or twist the socket clockwise to lock it into place, then reconnect the dust boot and the wiring harness.

5. 5

   Verify the Repair

   Turn on the headlights to confirm that the new bulb is working correctly. Cycle the ignition to ensure the fault code has cleared from the CommandCenter.

6. 6

   Further Diagnostics (If Bulb Replacement Fails)

   If a new bulb does not resolve the issue, or if the bulb blows repeatedly: check the electrical connector and socket for corrosion; inspect wiring for damage, chafing, or loose connections; check related fuses and relays; and check the alternator for overcharging (above 15V).