Bobcat W3261 (32-61) Fault Code: ACS Handle Lock Short to Ground
Also shown on the panel as 32-61 · Also called ACS (AHC) Handle Lock Short to Ground
ACS Handle Lock Short to Ground · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
W3261 (panel code 32-61) sets when the ACS controller commands voltage to the handle locks on signal wire 4220 but does not detect it, usually because that wire is shorted to ground. When this code is active the handle locks stay engaged, though the loader may still run in foot mode.
Medium severity. The loader can typically keep working in foot mode, so this is not an immediate stop-work code, but hand mode controls are locked out until the wiring or switch fault is fixed, which limits normal operation.
What does Bobcat error code W3261 mean?
W3261, also shown on some displays as M3261 or in panel form 32-61, is set by the ACS (Advanced Control System) controller when it commands battery voltage to the handle locks through signal wire 4220 and does not see that voltage arrive back as expected.
The ACS controller supplies battery voltage to the handle locks on signal wires 4230 and 4240, and to the hand/foot control mode switch LED on signal wire 4235, whenever hand mode is selected and PTOL (Pilot-operated Traction/Operator Lock, as used in Bobcat controls) is enabled. Wire 4220 is the signal path the controller checks to confirm the handle locks got power.
Because the controller cannot confirm handle lock voltage, it defaults to keeping the handle locks engaged as a safety measure. The machine may still be operable in foot mode, but hand-mode controls tied to the handle locks will not function correctly until the fault is cleared.
Common causes of W3261
- Signal wire 4220 shorted to ground
- Faulty hand/foot mode selection switch
- Faulty handle locks
- Faulty ACS controller
- Moisture, corrosion, or pushed-back pins in the ACS controller connectors, ACS harness, cab harness, mainframe harness, or handle lock connectors
- Intermittent faults from loose connections, corrosion, pushed-back pins, the controller, or the wire harness, alone or in combination, which may not be reproducible if the code is not active during testing
How to troubleshoot Bobcat W3261: first checks
- Confirm the conditions that are present when the code sets: hand mode selected, key switch in run/enter position, and PTOL enabled
- Visually inspect the ACS controller connectors, ACS harness, cab harness, mainframe harness, and handle lock connectors for moisture, corrosion, or pushed-back pins
- Check wire 4220 for a short to ground using a meter with the harness disconnected from the controller
- Test the hand/foot mode selection switch for proper operation and correct switching behavior
- Inspect the handle locks themselves for a wiring or mechanical fault that could pull the signal to ground
- If the code is not currently active, treat it as intermittent and focus on connector condition, loose pins, and harness rubbing or chafing points before condemning the controller
How the code clears
Once the repair is complete, clear the code by cycling the key power off and back on. No separate clearing procedure is listed beyond cycling power.
Affected models and serial ranges
W3261 appears in our records across 16 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-99999 |
| S530 | SN A7TV11001-99999, SN ATZD11001-99999 |
| S550 | SN A3NK11001-A3NL99999, SN A3NM11001-99999 |
| S570 | SN A7U711001-799999, SN A7U811001-899999 |
| S590 | SN ANMN11001-99999, SN ANMP11001-99999 |
| S630 | SN A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248, SN A3NW11249-99999 |
| S750 | SN A3P211001-299999 |
| S770 | SN A39511001-99999, SN A3P411001-99999 |
| T550 | SN A7UJ11001-AJZV12276 |
| T590 | SN ALJU11001-999999, SN B37811001-999999, SN B3Z711001-999999 |
| T630 | SN A7PU11001-11663, SN A7PU11664-99999 |
| T650 | SN A3P012214-099999, SN A3P111242-199999 |
| T750 | SN ANKA11001-A99999 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999, SN A3PH11001-99999 |
Frequently asked questions
What does Bobcat code W3261 mean?
It means the ACS controller sent power to the handle locks on signal wire 4220 but did not detect voltage arriving, most often because that wire is shorted to ground. This is described as an ACS (AHC) Handle Lock Short to Ground fault.
Can I still operate my Bobcat loader with W3261 active?
The handle locks will be engaged when this code is active, but the loader may still be able to operate in foot mode. Hand mode functions tied to the handle locks will not work correctly until the fault is fixed.
What causes W3261 on a Bobcat skid-steer or track loader?
Listed causes include a short to ground on signal wire 4220, a bad hand/foot mode selection switch, faulty handle locks, a faulty ACS controller, or moisture, corrosion, or pushed-back pins in any of the related connectors and harnesses.
Why does my Bobcat only throw this code intermittently?
If the fault is not present at the time of testing, the cause may not be reproducible right away. Probable causes for intermittent behavior include loose connections, corrosion, pushed-back pins, the controller itself, or the wire harness, sometimes a combination of these.
What conditions have to be true for W3261 to set?
The code sets only when hand mode is selected, the key switch is in the run/enter position, and PTOL is enabled. Outside of those conditions the controller is not actively checking for voltage on wire 4220.
How do I clear W3261 after making a repair?
Cycle the key power off and back on. No other clearing procedure is listed for this code.
Is W3261 the same as M3261?
M3261 and W3261 describe the same underlying fault condition, the ACS controller not detecting voltage to the handle locks on wire 4220. The panel number 32-61 refers to the same code.