Massey Ferguson 00.X.3C – Dash: Issue With The Signal Voltage From Forward/Reverse Lever, Low Voltage (Dash)

The controller is receiving a voltage signal from the forward/reverse (shuttle) lever potentiometer or switch that is below the expected operational threshold. This is typically caused by a short to ground, an open circuit in the wiring, or a failed/misadjusted shuttle lever potentiometer.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 5710SL
• 5711SL
• 5712SL
• 5713SL

1. 1

   Cycle the shuttle lever back and forth several times to free up potentially sticking internal switches

2. 2

   Inspect the wiring harness connecting the forward/reverse lever to the Dash module for chafed wires, disconnected plugs, or corrosion

3. 3

   Using a multimeter set to DC voltage, back-probe the signal wire (often the red wire) on the shuttle lever potentiometer relative to ground. With the tractor running and the gearbox in neutral, the baseline voltage should read exactly 2.5 V

1. 1

   Park the tractor on a level surface, engage the parking brake, and set the gearbox to neutral.

2. 2

   Locate the shuttle position potentiometer.

   Mounted either on the steering column or the transmission cover, depending on your exact cab configuration.

3. 3

   Start the tractor and loosen the two mounting screws on the potentiometer.

   With your multimeter connected to the signal wire and ground, loosen the two mounting screws (these have elongated/oval holes to allow for adjustment).

4. 4

   Gently rotate the potentiometer's position until you achieve a reading of exactly 2.5 V.

5. 5

   Tighten the mounting screws carefully to lock in this setting.

6. 6

   Restart the tractor, verify the voltage remains at 2.5 V, and test the shuttle during direction changes.

7. 7

   If the sensor is faulty and will not hold voltage, disconnect the electrical connector from the forward/reverse lever switch.

8. 8

   Remove the mounting screws/bolts securing the lever or switch assembly and install the new OEM replacement.

9. 9

   Reconnect the wiring harness and perform the 2.5 V adjustment procedure above.

10. 10

    Perform a shuttle calibration procedure.

    Turn the engine off and wait for all dashboard lights to go out. Restart the tractor and follow the specific Autotronic shuttle calibration sequence outlined in your operator's manual to ensure the Dash controller recognizes the new sensor sweep.