New Holland T8010 Manual page 1507

Auto PTO Switch Stuck On Condition
Cause:
The Data Bus signaled that Auto PTO switch is stuck ON.
The AUX/Hitch/PTO controller received the signal from the armrest controller.
Possible failure modes:
1. Bad Auto PTO switch.
2. Software execution error in the armrest controller (small chance).
Solution:
3. Connect the service tool to the tractor Data Bus, do the following:
Go to the Monitor screen by click the Monitor Icon.
Click the CHANGE PARAMETER SELECTIONS Icon.
Click the AUTO PTO SWITCH and then ADD. Next click EXIT. You will now be able to monitor the AUTO PTO
SWITCH status on the screen.
4. If service tool is not available check Auto PTO switch for proper function. Remove armrest and test switch.
PTO Remote Fender Switch Short
Cause:
The Data Bus signaled that PTO remote fender switch short. The PTO remote switches are hard wired to the AUX/
Hitch/PTO controller.
Possible failure modes:
1. Bad remote PTO switch.
2. Software execution error in the armrest controller (small chance).
Solution:
1. Check the wiring from the AUX/Hitch/PTO controller connector C057 back to remote fender switches. Check for
damage, chaffed wires that could result in a short circuit to power.
2. Disconnect AUX/Hitch/PTO controller connector C057. Ignition switch ON, check for power at connector C057
pin 12 to ground. The voltage should read approximately 12 volts. Depressing either the left or right remote
fender switch should drop reading to 0 volts.
3. Next check for power at connector C057 pin 11 to ground. The voltage should read 0 volts. Depressing either
the left or right remote fender switch should raise the reading to 12 volts.
4. If readings are okay erase fault code and continue operation. If 12 volts is present when not expected locate
source of short circuit.
Section 55 - Electrical System, Controller - Chapter 3
AUX/HITCH/PTO FAULT CODE 156
AUX/HITCH/PTO FAULT CODE 157
55-3-88