Case IH 18072 – Armrest Controller (ARM): EDC mouse raise/work switch fault (NH Only)

This code indicates a malfunction in the Electronic Draft Control (EDC) "mouse" switch. The system has detected an implausible signal, open circuit, or short circuit originating from this switch.

• Magnum
• Steiger
• Quadtrac
• Puma
• T7
• T8
• T9

1. 1

   Inspect the EDC mouse on the armrest for physical damage, sticking buttons, or debris lodged in the switch mechanism

2. 2

   Access the wiring harness inside the armrest console and inspect the connector to the EDC mouse for loose pins, corrosion, or backed-out wires

3. 3

   Using a multimeter, test the EDC mouse harness for continuity, checking for an open circuit, a short to ground, or a short to voltage (B+) on the switch signal wires leading back to the Armrest Controller

1. 1

   Power Down

   Turn off the ignition and disconnect the tractor's battery to prevent electrical shorts during repair.

2. 2

   Disassemble Armrest

   Remove the retaining screws and the upper cover of the right-hand multi-function armrest console to access the underside of the control layout.

3. 3

   Disconnect Switch

   Locate the EDC mouse assembly (situated near the CommandGrip joystick) and unplug its electrical connector.

4. 4

   Remove the EDC Mouse

   Unbolt or unclip the faulty EDC mouse housing from the armrest console.

5. 5

   Install New Part

   Seat the new EDC mouse control unit into the armrest and secure it. Reconnect the electrical harness.

6. 6

   Reassemble and Test

   Reinstall the armrest covers, reconnect the battery, and power on the tractor. Test the rear hitch raise and lower functions to ensure proper operation.

7. 7

   Clear Codes

   Use the tractor's display monitor or an Electronic Service Tool (EST) to clear the inactive 18072 fault code from the Armrest Controller's memory.