Massey Ferguson 03.00.94 – TECU: High Amp Draw On Auxiliary Valve Switch 6 (TECU)

The control module has detected an excessive electrical current (amperage) on the circuit responsible for the 6th auxiliary (spool) valve switch, indicating a short circuit to ground (0V) or a severely degraded component pulling more current than the circuit is rated to handle.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Inspect the wiring harness between the Auxiliary Valve 6 switch and the TECU for pinched wires, chafed insulation, or melted wiring shorting to the chassis.

2. 2

   Disconnect the switch and the valve solenoid, then check the connector pins for water ingress, dirt, or corrosion.

3. 3

   Test the Auxiliary Valve 6 switch for internal shorts using a multimeter.

4. 4

   Test the Auxiliary Valve 6 solenoid coil at the rear hydraulic block by measuring resistance across the coil pins and comparing it to a known good valve.

5. 5

   With the switch and solenoid disconnected, check for continuity between the signal wire and ground to isolate a shorted wiring harness.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the negative battery terminal to prevent electrical spikes during repair.

2. 2

   Access the Faulty Component

   Depending on your diagnostic findings, access either the armrest console (for a faulty FingerTIP switch), the rear fender (for a fender switch), or the rear hydraulic valve block (for a shorted solenoid).

3. 3

   Repair Wiring

   If a short to ground was found in the harness, cut out the damaged section of the wire. Solder in a replacement wire and seal it with marine-grade heat shrink tubing, or replace that specific harness section.

4. 4

   Replace the Component

   If the switch or the solenoid coil failed the resistance test, unbolt/unclip the faulty component and install the replacement part.

5. 5

   Reassemble and Reconnect

   Plug all connectors back in securely. Reconnect the battery.

6. 6

   Clear Codes and Test

   Turn the key to the ON position. Use the tractor's diagnostic interface (CCD/Datatronic screen) or a dealer service tool to clear the stored 03.00.94 fault code. Actuate Auxiliary Valve 6 multiple times to ensure the code does not return and the valve operates smoothly.