JLG Telehandler 33196 Fault Code: UGM Output Drivers - Auxiliary Function - A Valve - Open Circuit
UGM Output Drivers - Auxiliary Function - A Valve - Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Fault code 33196 means the JLG UGM (Universal Ground Module or main machine controller) has detected an open circuit or lost current feedback condition on the auxiliary function A valve output (J2-9). The machine shows machine system distress, disables that auxiliary hydraulics output, and shuts off the continuous auxiliary hydraulics feature until the machine is power cycled.
Medium severity. This fault disables one auxiliary hydraulics output and the continuous auxiliary hydraulics feature, it does not stop the machine from driving or lifting. Operators lose use of that auxiliary function until the fault is cleared, so work needing the A valve auxiliary circuit cannot continue safely until it is diagnosed.
What does JLG Telehandler error code 33196 mean?
Fault code 33196 is set by the UGM, the controller that manages machine outputs including auxiliary hydraulic valve drivers. This code points specifically to the auxiliary function A valve output on connector J2-9. The controller monitors current feedback on that circuit to confirm the valve driver is working correctly.
When the UGM detects a short to ground at this output, or detects that current feedback has been lost, it sets an internal flag and raises this fault as a machine system distress indicator. In response, the controller deactivates the J2-9 auxiliary function A valve output, deactivates and inhibits the continuous auxiliary hydraulics feature, and turns off the continuous auxiliary hydraulics indicator.
In plain terms, the machine has decided it cannot trust or safely drive that auxiliary valve output anymore, so it shuts that function down rather than risk uncontrolled hydraulic flow or a damaged driver circuit.
What triggers a JLG Telehandler 33196 code?
The UGM sets this fault when it detects a short to ground at the J2-9 auxiliary function A valve output, or when it detects a current feedback lost condition on that output. The controller uses an internal flag to confirm this condition is the actual cause of the fault before latching it.
Common causes of 33196
- Short to ground in the wiring between the UGM and the auxiliary function A valve coil at J2-9.
- Damaged or failed valve coil causing loss of current feedback to the UGM.
- Corroded, loose, or disconnected wiring connector at the auxiliary A valve or along its harness run to the UGM.
- Internal UGM output driver failure on the J2-9 circuit.
- Wiring harness chafe or pinch point causing an intermittent or hard short to ground.
How to troubleshoot JLG Telehandler 33196: first checks
- Inspect the wiring harness and connectors at the auxiliary function A valve and along the run back to the UGM for chafing, pinched wires, corrosion, or moisture intrusion.
- Check the auxiliary A valve coil for continuity and confirm it is not internally shorted or open.
- Check connector J2-9 at the UGM for corrosion, bent pins, or a loose connection.
- Trace the harness for any point where insulation may have worn through and contacted a grounded surface.
- With power off, verify there is no direct path to ground on the A valve output wiring before reapplying power and cycling the machine.
How the code clears
This fault latches until the machine undergoes a power cycle. No separate reset procedure is listed for this code beyond cycling machine power after the underlying wiring or valve issue has been corrected. If the short to ground or lost current feedback condition is still present after the power cycle, the fault will set again.
Frequently asked questions
What does JLG fault code 33196 mean?
It means the UGM controller detected an open circuit condition, specifically a short to ground or lost current feedback, on the auxiliary function A valve output at J2-9. The controller disables that auxiliary hydraulic output and the continuous auxiliary hydraulics feature as a result.
Can I keep operating the telehandler with fault code 33196 active?
The machine will continue basic operation, but the auxiliary function A valve output and the continuous auxiliary hydraulics feature will be disabled. Any work depending on that auxiliary hydraulic circuit will not function until the fault is diagnosed and cleared.
How do I clear fault code 33196 on a JLG telehandler?
The fault latches until the machine is power cycled. Correct the underlying wiring or valve issue first, since cycling power without fixing the short to ground or feedback loss will likely cause the fault to return immediately.
What is the A valve on a JLG telehandler auxiliary hydraulics system?
It is one of the auxiliary function valve outputs controlled by the UGM, wired through connector J2-9. It is part of the machine's auxiliary hydraulics circuit used for attachments or continuous auxiliary hydraulic functions.
What usually causes a short to ground on the A valve circuit?
Common causes include worn or chafed wiring insulation, pinched harness sections, corroded connectors, or a failed valve coil. A UGM internal driver failure is also possible but less common than a wiring or coil fault.
Why did the continuous auxiliary hydraulics feature turn off along with this fault?
The UGM treats the continuous auxiliary hydraulics feature as dependent on the A valve output. When it detects a fault on that output, it deactivates and inhibits the continuous auxiliary hydraulics feature and turns off its indicator as a protective measure.