New Holland T8010 Manual page 1614

Hitch Position Control Lever Potentiometer Failure
Cause:
Hitch position potentiometer has failed.
Possible failure modes:
1. Potentiometer shorted or open.
2. External wiring damage.
3. Loose connector, bent or partially inserted pin.
4. Controller failure.
Solution:
The hitch position control lever potentiometer is hard wired to the armrest controller. The lever position information
is broadcast over the Data Bus and can be monitored in the monitor screen of the service tool.
1. Open the armrest controller housing and disconnect connector J206 for hitch position control.
2. Test the parameters of the hitch position control lever potentiometer and its wiring. Pay attention for wiring
damage, loose connectors, or bent pins.
a) Measure the continuity between pin 1 and pin 3. The resistance should be about 1 k ohms.
b) Measure between pin 2 and pin 3 when moving the control lever up and down. The resistance should
change continuously and smoothly.
If there is any problem with the potentiometer function, replace the hitch position control.
3. Check the power supply:
a) Turn tractor key switch to the ACC position.
b) Test the switch power supply from the armrest controller at pin 1. It should be approximately 8 volts.
If no problem is found in above tests, go to the next step.
4. Connect the potentiometer from the hitch load control or 5th remote flow control (J205 or J207) to the J206 in
the controller. Turn control knob back and forth and monitor the hitch position control in the monitor screen of
the service tool.
If the potentiometer functions OK now, replace the hitch position control.
If the lever still does not function well and the fault code can be recorded again, replace the armrest controller.
NOTE: You can directly use the test procedure in step 4 to troubleshoot: Connect the potentiometer from the hitch
load control or 5th remote flow control (J205 or J207) to the J206 in the controller. Turn control knob back and forth
and monitor the hitch position control in the monitor screen. If the potentiometer functions OK now, replace the
hitch position control. If the lever still does not function well and the fault code can be recorded again, replace the
armrest controller, or connect the potentiometer from the hitch position control lever (J206) to the J205 or J207 in
the controller. Move the hitch position lever up and down and monitor the hitch load control or 5th remote flow
control in the monitor screen. If the lever still does not function well and the fault code can be recorded again,
replace the hitch position control. If the lever functions OK now, replace the armrest controller.
NOTE: See schematic section 45 on schematic poster.
Section 55 - Electrical System, Controller - Chapter 5
FAULT CODE ARM 69
55-5-9