Aux/Hitch/Pto Fault Code 25 - New Holland T8010 Manual

A. If none of the controllers come back on line, the problem is inside the cab. Check the Data bus wiring in
the cab for open circuits or shorts to ground. If the problem cannot be found in the wiring, disconnect each
controller one at a time to determine if one of the controllers has failed.
B. If all of the controllers except the engine controller come back online, the problem is the Data Bus external
to the cab. Check the Data bus wiring outside of the cab for open circuits or shorts to ground. The Data
bus can be split once again at connector C060 to determine which portion of the exterior Data bus wiring
has the problem. If the problem cannot be found in the wiring, disconnect the engine controller to
determine if it has failed.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting the Data Bus.
One intermittent connection can cause the entire bus to stop communications.
NOTE: Also see the Data Bus schematic foldouts 13 through 18 on the schematic poster.
Hitch Up/Down Switch Failure
Cause:
The Data Bus signaled that the hitch up/down switch has failed.
The AUX/Hitch/PTO controller received the signal from the armrest controller.
Possible failure modes:
1. The hitch up/down switch failed in the armrest controller (in most cases).
2. Software execution error in the armrest controller (small chance).
Solution:
The hitch up/down switch is hard wired to the armrest controller. If the hitch up/down switch fails in the armrest
controller, the fault code ARM 1049 should exist.
1. Check for fault code ARM 1049 at the armrest controller. If ARM 1049 exists, follow the corresponding
corrective action.
2. Check the function the armrest controller.
NOTE: See schematic section 46 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 3

AUX/HITCH/PTO FAULT CODE 25

55-3-22