Massey Ferguson 1B.01.08 – Linkage/PTO/Light Module On The B-Pillar: Issue With Signal From Hitch Maximum Height Dial

This code indicates a circuit or sensor failure where the electronic control system is receiving an erratic, out-of-range, or missing electrical signal from the potentiometer dial used by the operator to set the maximum lifting height of the rear 3-point hitch.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613

1. 1

   Inspect the physical condition of the Hitch Maximum Height Dial on the B-Pillar or armrest console to ensure it turns smoothly and is not broken.

2. 2

   Access the back of the dial and inspect the wiring harness and connector for corrosion, loose pins, or chafed wires.

3. 3

   Using a multimeter, verify the potentiometer receives the correct reference voltage and check the signal wire for smooth, linear voltage changes as the dial is turned.

4. 4

   Verify there are no accompanying LIN BUS or CAN BUS communication error codes (e.g., 1B.01.04 or 1B.01.06) indicating a broader module failure.

1. 1

   Disconnect Power

   Turn off the tractor ignition and disconnect the negative battery cable to prevent electrical shorts during the repair.

2. 2

   Access the Module

   Carefully pry up or unscrew the trim panels on the B-Pillar or the armrest control console to access the underside of the hitch control dials.

3. 3

   Disconnect the Dial

   Locate the specific potentiometer for the Maximum Height Dial. Unplug its electrical wiring harness connector.

4. 4

   Remove the Potentiometer

   Remove the retaining nut, locking clip, or screws securing the faulty potentiometer to the console panel and pull the switch out.

5. 5

   Install the New Part

   Insert the replacement potentiometer into the panel, ensuring the dial alignment notch matches the console. Secure it with the retaining hardware.

6. 6

   Reassembly

   Reconnect the electrical harness to the new dial. Reinstall the console trim panels.

7. 7

   Clear Codes and Calibrate

   Reconnect the battery. Turn on the ignition, clear the stored 1B.01.08 fault code using the diagnostic menu or a scan tool, and test the hitch maximum height function to ensure the signal is restored and the ELC responds accurately.