Massey Ferguson 1B.02.09 – Linkage/PTO/Light Module On The B-Pillar: Issue With Signal From Hitch Drop Rate Control Dial

The electronic control system is receiving an erratic, out-of-range, or missing electrical signal (typically a 0-5V voltage or resistance reading) from the potentiometer dial that controls how fast the rear 3-point hitch lowers.

• 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
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Inspect the Hitch Drop Rate Control Dial on the B-Pillar for physical damage, sticking, or fluid intrusion.

2. 2

   Remove the B-Pillar trim to access the rear of the control panel. Inspect the wiring harness and the connector plugging into the dial and the Linkage/PTO/Light Module for corrosion, backed-out pins, or chafed wires.

3. 3

   Test the potentiometer dial using a multimeter to check the resistance/voltage sweep. It should provide a smooth, linear signal (0-5V or up to 10,000 ohms). If the signal drops out, spikes, or reads open/shorted, the dial is internally faulty.

4. 4

   Verify that other dials on the B-Pillar (like Hitch Draft Control or Maximum Height) are functioning. If multiple dials are throwing codes, the issue is likely the shared ground/reference voltage from the B-Pillar module itself.

1. 1

   Power Down

   Turn off the tractor and disconnect the negative battery terminal to prevent electrical spikes.

2. 2

   Access the Module

   Carefully pry or unscrew the B-Pillar control panel trim to expose the Linkage/PTO/Light Module and the back of the control dials.

3. 3

   Disconnect the Dial

   Unplug the electrical connector specifically routed to the Hitch Drop Rate Control Dial.

4. 4

   Remove the Faulty Dial

   Depress the retaining tabs or remove the mounting screws holding the potentiometer switch in the panel and pull it free.

5. 5

   Install the New Part

   Seat the new drop rate dial into the panel until it clicks or is screwed securely into place.

6. 6

   Reconnect

   Plug the electrical connector back into the dial. Reinstall the B-Pillar trim panel.

7. 7

   Test and Clear Codes

   Reconnect the battery. Turn the key to the ON position, clear the stored 1B.02.09 fault code using the tractor's diagnostic display or a service tool, and test the hitch drop rate functionality to ensure the code does not return.