John Deere 522433.03 – RLC (Roof Lighting Control / Cab Roof Module): Rear Wiper Motor Low Speed Voltage High

Generated when the control software registers a voltage higher than 16 volts at the output to the rear window wiper, indicating that the rear wiper's low-speed circuit is shorted to a power supply lead.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8245R
• 8400R
• 9470RT
• 9520RT
• 9570RT
• 315SK
• 944K
• 260E
• 310E
• 524KII
• 624K

1. 1

   Check the display monitor to confirm fault code 522433.03 is currently active

2. 2

   Use a multimeter to check the voltage at the output to the rear window wiper motor (M14). A reading above 16V confirms the short to power

3. 3

   Visually and electrically inspect the low-speed circuit wiring harness running from the RLC (Cab Roof Module) to the rear wiper motor for chafed insulation, melted wires, or pinched harnesses

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery to prevent further electrical damage while working on the circuit.

2. 2

   Trace the Circuit

   Access the cab roof panel to expose the RLC module and the rear wiper motor (M14). Trace the low-speed wiring between the two components.

3. 3

   Repair the Short

   If a short-to-power is found in the wiring harness (e.g., wires rubbed bare against the cab frame), repair the damaged wire(s) using OEM-approved splicing methods, or replace that section of the cab roof harness.

4. 4

   Component Testing

   If the wiring harness tests good (no continuity to power when isolated), the internal circuitry of the rear wiper motor or the RLC module itself may be internally shorted.

5. 5

   Replace Faulty Component

   Replace the rear wiper motor or RLC module if they are found to be the source of the high voltage feedback.

6. 6

   Reassemble and Clear Codes

   Reconnect the battery, clear the diagnostic trouble codes from the system, and operate the rear wiper on low speed to verify the repair.