John Deere 523843.15 – HCU: Rear Hitch Control Switch Position Fault

The control module is receiving a signal voltage from the cab's rear hitch quick raise/lower switch that falls outside of the expected operating parameters (e.g., shorted to ground, shorted to power, or an internal potentiometer/contact failure), which typically disables the quick raise/lower function.

• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 5075M
• 5095M
• 5105M
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC
• 5R Series
• 6M Series
• 6R Series

1. 1

   Cycle power by turning the ignition key switch off, waiting a few moments, and turning it back on to clear potential temporary glitches.

2. 2

   Physically inspect the quick raise/lower rocker switch in the cab to ensure it is not physically stuck, jammed by debris, or damaged.

3. 3

   Inspect the wiring harness and connectors connecting to the switch for chafed wires, pinched harnesses, or corroded connector pins that could cause a short to ground or high voltage.

4. 4

   Ensure that the external fender-mounted remote hitch switches are not being pressed or shorted at the same time as the cab switch, as simultaneous inputs can trigger switch faults.

1. 1

   Prepare machine

   Park the tractor on a level surface, lower the rear hitch completely (if possible), turn off the engine, and remove the key.

2. 2

   Locate switch

   Locate the Quick Raise/Lower switch on the right-hand operator console.

3. 3

   Access switch

   Carefully pry or unclip the switch bezel/panel from the console to access the rear of the switch.

4. 4

   Disconnect harness

   Disconnect the electrical harness connector from the faulty switch.

5. 5

   Remove switch

   Depress the retaining tabs on the sides of the switch body and push it out of the mounting panel.

6. 6

   Install new switch

   Snap the new OEM switch into the panel.

7. 7

   Reconnect harness

   Reconnect the electrical harness, ensuring the connector clicks securely into place.

8. 8

   Reinstall panel

   Reinstall the console panel.

9. 9

   Test operation

   Turn the ignition on and test the raise/lower function to confirm the code has cleared and the hitch operates smoothly.