New Holland T8010 Manual page 1481

Electro Hydraulic Remote Top Link Switch Is Stuck On
Cause:
The Data Bus signaled that the top link switches remain closed (ON).
Possible failure mode:
1. A Top link switch failed (in most cases).
2. Software execution error in the AUX/Hitch/PTO controller (small chance).
Solution:
The top link switch is hard wired to the AUX/Hitch/PTO controller.
1. Disconnect the harness connectors C399 and C401 at top link switches on fenders. Check the switch function.
There should be no continuity between pins 1, 2 or 3. Depress switch to extend, there should be continuity
between pins 1 and 2 only. Depress switch to retract, there should be continuity between pins 2 and 3 only.
A. Switch contacts closed at all times, replace switch.
B. Switch tests out okay. Erase fault code and retry.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting.
NOTE: See schematic section 53 on the schematic poster.
Current Sensed When The Aux #1 Driver Is Off, Retract /Lower Coil Shorted
to 12 Volts
Cause:
When the lever for this remote section is in Neutral, the controller should provide no voltage to the solenoid. If the
controller senses voltage on the circuit, this fault code is recorded.
Possible failure modes:
1. Damaged wiring resulting short to power.
2. Controller internal failure.
Solution:
Check the wiring from the remote hydraulic controller to the remote valve.
Check the function of the remote hydraulic controller.
1. Check the wiring harness from the AUX/Hitch/PTO controller connectors C053 pin 10 and C058 pin 1 to the
remote valve connector C340 pins 1 and 2.
There should be no shortage to12 volt power at any pin location.
NOTE: Always inspect connector ends for damage, bent or dislocated pins when troubleshooting.
2. In any of the following two conditions, replace the controller.
a. No shortage to 12 V is found in the circuit and there is no 12 V at any of the pins or cavities,
b. The 12 V is traced to the controller connectors C053 pin 10 or C058 pin 1 when the lever is in Neutral.
NOTE: See schematic section 54 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 3
AUX/HITCH/PTO FAULT CODE 120
AUX/HITCH/PTO FAULT CODE 123
55-3-62