New Holland TMF 133 – TMF (Tractor Multi-Function): Aux 3rd Raise Coil solenoid shorted to 12 volts.

Current is being sensed by the controller when the Auxiliary #3 driver is commanded OFF. This indicates that the extend/raise coil circuit for the 3rd remote valve is shorted to a 12-volt power source.

• New Holland TG Series (e.g., TG215)
• New Holland T8000 Series (e.g., T8020, T8030, T8040)
• New Holland MXM / TM Series

1. 1

   Disconnect the electrical connector at the Aux 3rd raise coil solenoid, turn the key ON (engine off) with Aux 3 in neutral, and check for 12 volts on the harness side to identify a harness short to power.

2. 2

   Measure the resistance (ohms) across the pins of the Aux 3rd raise coil solenoid to check for an internal short (near zero ohms).

3. 3

   If the harness and solenoid test fine, check the TMF controller for a failed (shorted) internal high-side driver.

1. 1

   Power Down

   Turn off the tractor, remove the key, and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Locate the Valve Block

   Locate the rear remote valve stack (electro-hydraulic remotes) at the rear of the tractor. Identify the 3rd auxiliary valve slice and locate the "Raise/Extend" solenoid coil.

3. 3

   Inspect Wiring

   Carefully inspect the wiring harness leading to the 3rd remote valve. Look for chafing, melted insulation, or pinched wires where a 12V wire might be making contact with the solenoid signal wire. Repair any damaged wiring using heat-shrink connectors.

4. 4

   Replace the Solenoid

   If internally shorted: Disconnect the wiring harness from the faulty solenoid. Remove the retaining nut or bolt holding the solenoid coil to the valve cartridge. Slide the old coil off the valve stem. Slide the new OEM solenoid coil onto the stem and secure it with the retaining nut (do not overtighten, as this can warp the cartridge).

5. 5

   Reassemble and Test

   Reconnect the wiring harness, reconnect the battery, and start the tractor. Operate the 3rd auxiliary remote through its full range of motion to verify operation.

6. 6

   Clear Codes

   Use the tractor's diagnostic display or a service tool to clear the TMF 133 fault code from the system memory.