JLG Telehandler 33225 Fault Code: UGM Output Drivers - Left Stabilizer Up Valve - Open Circuit
UGM Output Drivers - Left Stabilizer Up Valve - Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Code 33225 sets when the UGM (upper ground module) detects an open circuit on the left stabilizer up valve output, on a machine where stabilizers are configured in the setup menu. It shows as machine system distress on the indicator, and the controller shuts down all four stabilizer valve outputs (left and right, up and down) until the machine is power cycled.
High severity. This code disables all four stabilizer valve outputs, not just the left stabilizer up valve. A machine that relies on stabilizers for stability during lift or platform work should not be operated until the open circuit is found and the outputs are confirmed working again.
What does JLG Telehandler error code 33225 mean?
Fault code 33225 is set by the UGM when it detects an open circuit on the output that drives the left stabilizer up valve. This only applies on machines where the stabilizers have been configured in the machine setup menu.
When the UGM sees this open circuit, it does not just disable the left stabilizer up valve. It deactivates all four stabilizer valve outputs: right stabilizer up, right stabilizer down, left stabilizer up, and left stabilizer down. This is a protective shutdown so the stabilizers do not operate in an unpredictable or unbalanced way.
The fault latches until the machine is power cycled. That means even if the wiring issue clears itself or is temporarily reconnected, the stabilizer outputs stay disabled until the machine is shut down and restarted.
Common causes of 33225
- Open circuit in the wiring between the UGM output J2-10 and the left stabilizer up valve coil
- Damaged, corroded, or disconnected connector at the left stabilizer up valve or along its harness run
- Failed or open valve coil on the left stabilizer up valve itself
- Internal fault in the UGM output driver circuit for that output
How to troubleshoot JLG Telehandler 33225: first checks
- Inspect the wiring harness and connectors between the UGM and the left stabilizer up valve for visible damage, chafing, or corrosion
- Check that the valve coil connector for the left stabilizer up valve is fully seated and locked
- Test continuity of the wiring from the UGM output J2-10 through to the valve coil to confirm there is no open circuit
- Verify the left stabilizer up valve coil itself has continuity and has not failed open
- Confirm the stabilizers are correctly configured in the machine setup menu, since this fault only applies when stabilizers are enabled there
How the code clears
This fault latches until the machine is power cycled. No separate clearing step is listed beyond correcting the open circuit and cycling machine power. Simply reconnecting a loose wire without a power cycle will not bring the stabilizer outputs back online.
Frequently asked questions
What does JLG fault code 33225 mean?
It means the UGM has detected an open circuit on the output that controls the left stabilizer up valve. Because of this, the UGM disables all four stabilizer valve outputs (left and right, up and down) as a protective measure.
Why do all four stabilizer valves stop working if only the left stabilizer up valve has a fault?
The UGM treats an open circuit on one stabilizer output as a reason to shut down the whole stabilizer output group. This prevents partial or unbalanced stabilizer operation while there is an unresolved wiring or valve issue.
Will the stabilizers start working again on their own once I fix the wiring?
No. The fault latches until the machine is power cycled. Even after the open circuit is repaired, you need to shut the machine down and restart it before the stabilizer outputs will function again.
Does this code apply to every JLG telehandler?
It only applies to machines where the stabilizers are configured in the machine setup menu. If stabilizers are not configured on your machine, this specific trigger condition does not apply.
Is it safe to keep working if I get fault code 33225?
No. With all four stabilizer valve outputs disabled, the machine loses stabilizer function entirely. Any work that depends on the stabilizers for stability should stop until the open circuit is diagnosed, repaired, and the machine has been power cycled to clear the fault.
Where should I start looking for the open circuit?
Start at the connector for the left stabilizer up valve and work back along the harness toward the UGM output. Corrosion, loose pins, or chafed wiring are common places to find an open circuit, along with a failed valve coil.