John Deere 523832.13 – HCC / HCU: Rear Hitch Drop Speed Dial Voltage Out Of Range

The control unit is receiving a voltage signal from the rate-of-drop potentiometer (the dial that controls how fast the rear hitch lowers) that falls outside of the expected calibrated parameters. This is typically caused by a failed potentiometer, a short circuit in the wiring harness, or a loss of calibration.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 5090M
• 5100M
• 5100MH
• 5100ML
• 5115M
• 5065M
• 5075M
• 5085M
• 5115ML
• 5095M
• 5095MH
• 5105M
• 5015ML
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC

1. 1

   Low-End Voltage Check: Turn the rate-of-drop dial fully counterclockwise. The voltage should read between 0.25V and 1.5V.

2. 2

   High-End Voltage Check: Turn the dial fully clockwise. The voltage should read between 3.5V and 4.75V.

3. 3

   Range Verification: Ensure the full clockwise voltage is at least 2 volts higher than the full counterclockwise voltage.

4. 4

   Sweep Test: Slowly turn the dial through its entire range while monitoring the voltage. There should be no sudden drops, spikes, or erratic changes (dead spots).

5. 5

   Harness Check: Inspect the wiring harness and connectors leading to the hitch control panel for corrosion, pinched wires, or short circuits (which can cause the voltage to spike over 4.75V).

1. 1

   Disconnect Power

   Disconnect the tractor's battery to prevent electrical damage during component replacement.

2. 2

   Access the Module

   Remove the trim panels on the right-hand operator console to access the underside of the rear hitch control dials.

3. 3

   Remove the Component

   Disconnect the wiring harness connector from the hitch control module/potentiometer assembly. Remove the retaining screws or clips holding the assembly in place.

4. 4

   Install the New Part

   Install the new potentiometer or the complete hitch control module assembly (depending on how the part is serviced for your specific model).

5. 5

   Reassemble

   Reconnect the wiring harness and reinstall the console trim panels. Reconnect the battery.

6. 6

   Calibrate the HCU/HCC

   Because the code specifically flags a calibration fault (.13), you must perform an HCU/HCC calibration procedure using a John Deere diagnostic tool (Service ADVISOR) or the tractor's onboard diagnostic menu so the control unit can learn the minimum and maximum voltage limits of the new potentiometer.