New Holland T8010 Manual page 1601

Front Suspension lower lock solenoid circuit shorted or open circuit
Cause:
The transmission controller monitors the lower lock 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 lock solenoid coil failed.
2. The lower lock solenoid wiring failed open or shorted to ground.
Solution:
The transmission controller measures the current draw from the lower lock 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 abnormal routing and wire damage.
2. Disconnect connector C355 from the transmission controller.
Measure the resistance between cavity 3 and cavity 15 of connector C355 at the wiring harness side.
The resistance should be around 5.6 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.
If the resistance is as specified, go to the next step.
3. Measure the resistance from cavity 3 or cavity 15 of connector C355 to the chassis ground.
If the resistance is less than a few ohms, there is a shortage from the wire to the ground. Check for wire
shortage in the harness.
If the above checks are all OK, check the lower lock solenoid.
4. Check lower lock solenoid.
Disconnect the lower lock solenoid at connector C187.
Measure the resistance between pin 1 and pin 2 of the solenoid.
The resistance should be around 5.6 ohms.
If the resistance is dramatically higher than specified, the lower lock solenoid coil failed open.
If the resistance is close to 0, there is an internal shortage.
In either case, replace the lower lock solenoid.
5. If no problem is found in above test, check both male and female pins in the cavity 3 and cavity15 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 145
55-4-74