New Holland NH 1025 – EDC (Electronic Draft Control) Module / Hitch Controller / Armrest Module (ARU): Mouse lift lever potentiometer signal too low.

This code indicates a fault in the Electronic Draft Control (EDC) system. Specifically, the voltage signal returning from the potentiometer inside the "EDC mouse" (the multi-function hitch control lever/pod) has dropped below the minimum acceptable threshold, typically indicating an open circuit, a short to ground, or a failed internal potentiometer.

• T6 Series
• T6010
• T6020
• T6050
• T6070
• T7 Series
• T7.220
• T7.235
• T7.250
• T8 Series
• T8.275
• T8.330
• T8.390
• T9 Series
• TM Series
• Genesis series

1. 1

   Check for related 5-volt reference codes (such as NH 1053 or NH 1054). If present, the issue may be a shared power supply rather than the mouse itself.

2. 2

   Inspect the wiring harness and connectors between the EDC mouse and the controller for pinched wires, chafing, or disconnected plugs.

3. 3

   Disconnect the EDC mouse and probe the harness connector with a multimeter to verify that the controller is supplying a steady 5V reference and a good ground to the sensor.

4. 4

   Check the signal wire for continuity back to the EDC/Armrest controller, and ensure it is not shorted to ground.

5. 5

   Test the resistance/voltage sweep of the mouse potentiometer while moving the lift lever. If the signal drops out, stays low, or has dead spots, the potentiometer/mouse assembly has failed internally.

1. 1

   Power Down

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

2. 2

   Access the Mouse

   Remove the trim panels on the right-hand console or the SideWinder™ II armrest to expose the mounting hardware for the EDC mouse assembly.

3. 3

   Disconnect

   Unplug the electrical connector(s) leading to the EDC mouse.

4. 4

   Remove & Replace

   Remove the retaining screws holding the mouse assembly in place. Install the new EDC mouse assembly and secure the hardware.

5. 5

   Reassemble

   Reconnect the wiring harness and reinstall the armrest/console trim panels.

6. 6

   Calibration

   Reconnect the battery and turn the key on. Perform a Hydraulic Lift Autocalibration (often prompted by code NH 1024) to teach the controller the new potentiometer's minimum and maximum voltage values.