New Holland T8010 Manual page 1522

Section 55 - Electrical System, Controller - Chapter 3
AUX/HITCH/PTO FAULT CODE 174
Current Flowing In The Sense Resistor When The High Side Was Off
Cause:
The sense resistor is an internal component in the AUX/Hitch/PTO controller. There should be no current flow in
the sense resistor when the high side is off.
Possible failure modes:
1. Bad AUX/Hitch/PTO controller.
Solution:
Replace AUX/Hitch/PTO controller.
55-3-103