New Holland SFA 10023 – SFA (Suspended Front Axle / Front Suspension): 12VF3 voltage supply is low. (possible blown fuse*)

The electronic control unit is detecting insufficient voltage (below the 12-volt threshold) on the F3 power supply rail. The system explicitly flags this condition as being highly likely caused by a blown fuse.

• New Holland T8.xxx Series
• New Holland T-series tractors with Suspended Front Axles

1. 1

   Inspect the Fuse: Locate the fuse box and check the fuse designated for the 12VF3 circuit (often labeled as UCM/VCM B+ (+12VF3)).

2. 2

   Check Connectors: Inspect the electrical connectors between the fuse panel and the SFA module. Ensure connectors are fully seated, pins are tight and in the correct position, and there is no corrosion or physical damage.

3. 3

   Test Continuity and Voltage: Use a multimeter to verify that a full 12 volts is reaching the SFA module on the 12VF3 pin. If voltage is low but the fuse is intact, check the wiring harness for high resistance, chafing, or a partial short to ground.

1. 1

   Power down tractor

   Power down the tractor and remove the key.

2. 2

   Access fuse panel

   Access the main fuse/relay panel.

3. 3

   Locate 12VF3 fuse

   Locate the fuse for the 12VF3 circuit. Depending on your specific model's fuse layout, this is often located at Block 3B, position F-076.

4. 4

   Inspect and replace fuse

   Remove and inspect the 20A mini fuse. If it is blown, replace it with a new 20A yellow mini fuse.

5. 5

   Test and trace wiring

   Turn the key to the ON position. If the fuse blows again immediately, do not keep replacing it. You must trace the 12VF3 wiring harness down to the front suspension module to find the short-to-ground (chafed wire touching the chassis) and repair the wire.

6. 6

   Clear codes and test

   Once voltage is restored, clear the fault codes from the display and test the front suspension operation to ensure the code does not return.