Massey Ferguson 03.03.97 – TECU: High Amp Draw On Auxiliary Valve Switch 7 (TECU)

This code indicates that the control module has detected an excessive electrical current (high amperage draw) on the circuit belonging to Auxiliary Valve Switch 7. This is typically caused by a short circuit to ground (0 V) within the switch itself, a pinched or chafed wiring harness shorting to the tractor's chassis, or a failing solenoid coil drawing too much power.

• 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 running from the TECU to Auxiliary Valve Switch 7 for melted insulation, chafing, or pinched wires that could cause a short to ground.

2. 2

   Disconnect the plug at Auxiliary Valve Switch 7 and inspect the pins for corrosion, moisture ingress, or bent terminals.

3. 3

   With the switch disconnected, turn the ignition on and check if the active fault code changes to an open circuit or voltage code (e.g., 03.03.98). If it changes, the short is internal to the switch; if it remains, the short is in the wiring harness.

4. 4

   Use a digital multimeter to test the resistance of the switch and check the harness for continuity to ground.

1. 1

   Power Down

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

2. 2

   Access the Switch

   Remove the necessary trim panels on the armrest or side console to access the underside of the auxiliary valve switches.

3. 3

   Disconnect and Remove

   Unplug the electrical connector from Auxiliary Valve Switch 7. Depress the retaining clips or remove the mounting screws holding the switch in the console bezel, and pull the switch out.

4. 4

   Harness Repair (If Applicable)

   If your diagnostics revealed a short in the wiring rather than the switch, locate the damaged section of the wire. Cut out the damaged wire, solder in a replacement section of the same gauge, and seal it with marine-grade heat shrink tubing.

5. 5

   Install New Part

   Insert the new auxiliary valve switch into the console until it clicks into place or secure it with its mounting hardware.

6. 6

   Reconnect

   Plug the wiring harness connector back into the switch. Reconnect the tractor's battery.

7. 7

   Clear Codes and Test

   Turn the ignition on. Use a compatible diagnostic scan tool to clear the 03.03.97 fault code from the TECU memory. Operate Auxiliary Valve 7 to ensure the high amp draw code does not return and the hydraulic remote functions correctly.