John Deere ACU524025.31 – ACU: Left-Hand Reverser Circuit Problem

The Armrest Control Unit (ACU) has detected an electrical issue within the circuit of the left-hand reverser lever. The left-hand reverser allows the operator to shuttle between forward and reverse without using the clutch. This fault code indicates a specific failure related to this left reverse function, requiring further diagnosis to identify the exact cause.

• 7010 Series
• 7020 Series
• 7030 Series
• 7630
• 7730
• 7830
• 7930
• 7720
• 7820
• 7920
• 7810
• 8R Series

1. 1

   Restart the tractor to see if the code clears, which can reset communication errors

2. 2

   Check fuses related to the cab and operator controls, specifically fuse F15

3. 3

   Ensure the operator is properly seated to verify the operator presence switch is engaged

4. 4

   Inspect the wiring harness and connectors for the left-hand reverser lever for damage, corrosion, or loose connections

5. 5

   Check for other active fault codes related to power supply or operator controls

1. 1

   Restart tractor

   Shut down the tractor, wait a few moments, and restart it to see if the communication error clears.

2. 2

   Inspect fuses

   Check cab and operator control fuses. Pay special attention to fuse F15, which is related to CAB switched power voltage.

3. 3

   Verify operator presence switch

   Ensure the operator is properly seated. A faulty operator presence switch or incorrect seating can trigger unexpected electronic issues.

4. 4

   Inspect wiring and connectors

   Visually inspect the wiring harness and connectors for the left-hand reverser lever. Repair any damaged wires, corrosion, or loose connections.

5. 5

   Perform circuit test or contact dealer

   If initial checks do not resolve the issue, a specific 'Left-Hand Reverser Circuit Test' is required. Contact a John Deere dealer for advanced diagnosis and repair.