New Holland T8010 Manual page 1570

Low clutch Solenoid Or Its Wiring Failed Open Or Shorted To Ground
Possible failure mode:
1. The low clutch solenoid coil failed open.
2. Low clutch solenoid wiring failed open or shorted to ground.
Solution:
The transmission controller measures the current draw from the low clutch solenoid circuit. If the current draw is
lower than a limit, it means the circuit is open or shorted to ground. If the problem is temperature sensitive, the
solenoid coil may be starting to fail.
1. Remove the controller cover from the rear of the tractor. Visually inspect the wiring harness from the
transmission controller towards the solenoids under the cab. Check the wiring harness for damage.
2. Disconnect connector C355 from the transmission controller. Measure the resistance between cavity 14 and
cavity 18 of connector C355 on the wiring harness side. The resistance should be around 10 ohms.
If the resistance is dramatically higher than specified, there is an open in the circuit. Check the harness first for
the open. If the harness is okay, check the low clutch solenoid for the open.
If the resistance is around 10 ohms, go to next step.
3. Measure the resistance between cavity 14 of connector C355 and the chassis ground. If the resistance is less
than a few ohms, there is a short from the wire to ground. Check the wire for damage between the low clutch
solenoid and the transmission controller.
Measure the resistance between cavity 18 of connector C355 and the chassis ground. If the resistance is less
than a few ohms, there is a short from the wire to ground. Check the wire for damage between the low clutch
solenoid and the transmission controller.
If the harness is okay check the low clutch solenoid.
4. Lift the cab. Disconnect the low clutch solenoid connector (C036).
Measure the resistance between pin 1 and pin 2 of the solenoid.
The resistance should be around 10 ohms.
If the resistance is dramatically higher than specified, the low clutch solenoid coil is failed open. Replace the
low clutch solenoid.
If the resistance is as specified above, check to see if the coil is internally shorted to solenoid case.
5. If no problem is found in above test, check both male and female pins in the cavity 14 and cavity 18 of
connector C355.
Check for loose, bent, or any damaged pins.
Section 55 - Electrical System, Controller - Chapter 4
FAULT CODE TRANS 109
55-4-43