New Holland T8010 Manual page 1620

The 5th Remote Hydraulic Flow Control Potentiometer Failure
Cause:
The 5th remote valve flow 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 5th remote hydraulic flow control potentiometer (AUX 5 FLOW) is hard wired to the armrest controller. The
potentiometer 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 J207 for AUX 5 FLOW.
2. Test the AUX 5 FLOW control 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 knob back and forth. The resistance should
change continuously and smoothly.
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 position control or hitch load control (J206 or J205) to the J207 in the
controller. Turn control lever or knob back and forth and monitor the 5th remote flow control in the monitor
screen of the service tool.
If the lever or potentiometer functions OK now, replace the 5th remote flow control.
If the lever or potentiometer 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
position control or hitch load control (J206 or J205) to the J207 in the controller. Turn control lever or knob back and
forth and monitor the 5th remote flow control in the monitor screen. If the lever or pot functions OK now, replace the
5th remote flow control. If the lever or potentiometer does not function well and the fault code can be recorded
again, replace the armrest controller, or connect the potentiometer from the 5th remote flow control lever (J207) to
the J206 or J205 in the controller. Move the knob back and forth and monitor the hitch position control or hitch load
control in the monitor screen. If the potentiometer still does not function well and the fault code can be recorded
again, replace the 5th remote flow control. If the potentiometer 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 129
55-5-15