John Deere 002358.05 – RLC: High-Beam Headlight Circuit Fault

This fault code indicates a high-beam headlight circuit fault where the current is below the normal range or the circuit is open. Low amps are detected at the Grab Rail Headlight High Beam/Work Light pin on the Roof Lighting Control Unit (RLC) when the lights are turned on. This condition is typically caused by a blown bulb, high resistance in a connector, or a break in the wiring.

• 8R Series
• 8RW Series
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 9RT Series
• 9470RT
• 9520RT
• 9570RT

1. 1

   Visually inspect the headlight bulb, socket, and all visible wiring and connectors leading to the grab rail headlight for any signs of damage, corrosion, or loose connections

2. 2

   Cycle the tractor's key switch off and on again to see if it clears a minor electrical fault

3. 3

   Check the high-beam headlight bulb, as a blown bulb is the most common cause for this fault

1. 1

   Replace headlight bulb

   If the bulb is blown or faulty, replace the high-beam headlight bulb. This is the primary recommended solution.

2. 2

   Check for voltage

   If a new bulb does not resolve the issue, use a multimeter to verify that voltage is present at the headlight socket when the high beams are activated.

3. 3

   Test wiring continuity

   If no voltage is present at the socket, check the continuity of the wiring from the Roof Lighting Control Unit (RLC) to the headlight socket to identify any breaks in the wire.

4. 4

   Inspect and clean connectors

   Disconnect, inspect, and clean all electrical connectors in the high-beam circuit. High resistance from corrosion or a poorly seated pin can cause a low current draw and trigger the fault.

5. 5

   Consult dealer for RLC diagnostics

   If the fault persists after verifying the bulb and circuit, the issue may lie within the Roof Lighting Control Unit itself. Contact a John Deere dealer for further diagnostics.