Case IH 518313-06 - VCM – VCM: Rear hitch side link extend solenoid circuit fault

Indicates a circuit fault with the Rear hitch side link extend solenoid. The underlying condition is a hard electrical failure in the solenoid coil or its wiring harness (either a short to ground causing excessive current draw, or a broken/open wire).

• MAGNUM AFS Connect
• Magnum 400 AFS Connect

1. 1

   Inspect the wiring harness running from the VCM to the rear hitch side link extend solenoid for pinched wires, chafing against the tractor frame, or melted insulation.

2. 2

   Disconnect the solenoid connector and inspect for water ingress, corrosion, or pushed-out pins.

3. 3

   Use a multimeter to measure the resistance across the pins of the solenoid coil to check for an internal short (near zero) or open circuit (infinite).

4. 4

   Test the continuity of the wiring harness between the solenoid connector and the VCM pins to isolate a break or short in the harness.

1. 1

   Power down the tractor, engage the parking brake, and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Locate the rear hitch side link extend solenoid on the rear hydraulic remote/hitch valve block assembly.

3. 3

   Depress the locking tab and unplug the electrical connector from the solenoid.

4. 4

   If the fault is in the wiring: Repair any chafed or broken wires in the harness using solder and marine-grade heat shrink, or replace the damaged harness section.

5. 5

   If the fault is a failed solenoid: Remove the retaining nut or snap-ring securing the solenoid coil to the hydraulic valve cartridge.

6. 6

   Slide the faulty solenoid coil off the valve stem.

   Note: You typically do not need to open the hydraulic system or remove the cartridge valve just to replace the electrical coil.

7. 7

   Slide the new solenoid coil onto the valve stem and secure it with the retaining nut/clip.

8. 8

   Reconnect the electrical harness to the new solenoid.

9. 9

   Reconnect the battery, turn the key on, and use the Pro 1200 display or a diagnostic tool to clear the VCM fault codes.

10. 10

    Test the rear hitch side link extension function to verify the repair.