New Holland T8010 Manual page 1596

Front Suspension Lower solenoid circuit shorted or open circuit
Cause:
The transmission controller monitors the Lower solenoid circuit. If the transmission controller detected open circuit
or too much current draw in circuit, this fault code will be recorded.
Possible failure mode:
1. The Lower solenoid coil failed.
2. The Lower solenoid wiring failed open or shorted to ground.
Solution:
The transmission controller measures the current draw from the Lower solenoid circuit.
If the current draw is lower than a limit, it means the circuit is open.
If the current draw is higher than a limit, it means the circuit is 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 solenoid. Check for proper routing and wire damage.
2. Disconnect connector C355 from the transmission controller.
Measure the resistance between cavity 15 of connector C355 and the chassis ground at 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.
If the resistance is close to 0, there is a shortage in the circuit.
Check the harness. If the harness is OK, check the Lower solenoid.
3. Check the Lower solenoid.
Disconnect the Lower solenoid at connector C184.
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 Lower solenoid coil failed open.
If the resistance is close to 0, there is an internal shortage.
In either case, replace the Lower solenoid.
4. If no problem is found in above test, check both male and female pins in the cavity 15 of connector C355.
Check for no loose pin, bent pin, or any damage.
NOTE: See the Data Bus schematic section 43 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 4
FAULT CODE TRANS 139
55-4-69