New Holland T8010 Manual page 1471

Both Auto MFD and MFD On Switches are Active
Cause:
The Data Bus signaled that the MFD switches have failed.
The AUX/Hitch/PTO controller received the signal from the armrest controller.
Possible failure mode:
1. The MFD switch failed in the armrest controller (in most cases).
2. Software execution error in the armrest controller (small chance).
Solution:
The MFD switch is hard wired to the armrest controller. If the MFD switch fails in the armrest controller, the fault
code ARM 1069 should exist.
1. Check for fault code ARM 1069 at the armrest controller. If ARM 1069 exists, follow the corresponding
corrective action.
2. Check the function the armrest controller.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting.
NOTE: See schematic section 44 on the schematic poster.
Differential Lockout Software Fault Condition
Cause:
The AUX/Hitch/PTO controller has flagged a Diff lock software fault condition.
Solution:
Calibrate the AUX/Hitch/PTO controller again. If the same fault code is logged after calibration, change the
controller. Calibrate the AUX/Hitch/PTO controller again.
Section 55 - Electrical System, Controller - Chapter 3
AUX/HITCH/PTO FAULT CODE 93
AUX/HITCH/PTO FAULT CODE 94
55-3-52