New Holland 6004 – MFD/Diff Lock: Rear Diff Lock Switch Failed in Armrest

The fault code indicates that the Rear Diff Lock Switch in the Armrest has failed. This may be due to a failure of the switch itself or communication issues between the TCU controller and the Armrest controller.

1. 1

   The Rear Diff Lock Switch in the Armrest

2. 2

   The communication link between the TCU controller and the Armrest controller

1. 1

   Inspect

   Inspect the Rear Diff Lock Switch in the Armrest for physical damage or wear.

2. 2

   Test

   Test the communication between the TCU controller and the Armrest controller using the appropriate diagnostic tool.

3. 3

   Replace

   If the switch is found to be faulty, replace the Rear Diff Lock Switch in the Armrest.