Case IH 9060 - UCM – UCM: Front hitch 14bar accumulator solenoid - open circuit or short circuit to ground

The control module detects a break in the electrical path (open circuit) or the power/signal wire is making unintended contact with the machine's chassis (short circuit to ground), preventing the solenoid from actuating.

• VESTRUM CVX
• Magnum series

1. 1

   Inspect the wiring harness running from the UCM to the front hitch accumulator solenoid for obvious signs of chafing, pinched wires, or melted insulation that could cause a short to ground.

2. 2

   Disconnect the solenoid and inspect the pins for water ingress, corrosion, or pushed-back terminals, which commonly cause open circuits.

3. 3

   Use a multimeter to check the continuity of the wires between the UCM harness connector and the solenoid connector. Test the power wire for continuity to ground to rule out a short circuit.

4. 4

   Measure the resistance across the pins of the 14bar accumulator solenoid itself to verify the internal coil is not open or shorted.

1. 1

   Repair or replace

   Repair or replace the damaged section of the wiring harness if a short or break is found.

2. 2

   Clean and lubricate

   Clean and apply dielectric grease to the connectors if corrosion is the culprit.

3. 3

   Replace

   Replace the front hitch accumulator solenoid valve if the internal coil fails the resistance test.