Bobcat H1324 (13-24) Fault Code: Rear Auxiliary Thumb Paddle Switch Not in Neutral
Also shown on the panel as 13-24 · Also called Left Auxiliary PWM Switch Not in Neutral, Left Thumb Switch Not in Neutral, Rear Auxiliary Thumb Paddle Switch Not In Neutral
Rear Auxiliary Thumb Paddle Switch Not in Neutral · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Bobcat code H1324 (panel display 13-24) sets when the auxiliary controller sees the left thumb paddle switch is not in neutral while the auxiliaries are enabled. When it sets, the rear auxiliary outputs are disabled until the condition clears.
Medium severity. H1324 is not an engine-damage or safety-shutdown code by itself, but it disables rear auxiliary outputs, which stops attachment functions from working. Diagnose it before relying on rear auxiliaries for attachment work.
What does Bobcat error code H1324 mean?
>Code H1324 means the auxiliary controller has detected that the left (front auxiliary) thumb paddle switch is not sitting in the neutral position at the moment the auxiliaries were enabled. This is a safety interlock: the machine will not let rear auxiliary outputs activate unless the controller can confirm the switch was neutral first.
The left thumb paddle switch signal travels over CAN communication through wires 91xx/95xx and 92xx/96xx to the auxiliary controller. If that signal path or the switch itself reports an out-of-neutral state when it should not, or if the operator is genuinely holding the paddle out of neutral when auxiliaries are enabled, the controller sets H1324 and shuts down the rear auxiliary outputs as a protective measure.
This code appears across a wide range of Bobcat excavator and skid steer/track loader models (E35, E45, S510 through S770, T550 through T870). If you are running the machine with a radio remote control setup, Bobcat specifically calls out checking the radio remote control diagnostics screen to confirm the rear auxiliary thumb paddle switch is behaving correctly.
Common causes of H1324
- Operator is holding the left thumb paddle switch out of neutral when the auxiliaries are enabled (this may be a real operator input, not a fault).
- Left joystick grip is faulty.
- Auxiliary controller itself is faulty.
- Moisture, corrosion, or pushed-back pins in the auxiliary controller connectors, the left joystick grip connector, the mainframe harness, or the AWS/SJC wire harness.
- Intermittent condition where the code is not present at time of testing; probable causes still include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat H1324: first checks
- Confirm the key switch/run-enter is on and the rear auxiliary function is actually enabled, since these are the conditions required for the code to be evaluated in the first place.
- Watch the operator's hand position on the left thumb paddle switch when auxiliaries are enabled. Make sure the paddle is fully released to neutral and not held or obstructed.
- Inspect the left joystick grip connector, the auxiliary controller connectors, the mainframe harness, and the AWS/SJC wire harness connectors for moisture, corrosion, or pushed-back pins.
- If running with a radio remote control setup, open the diagnostic software's Diagnostics > Radio Remote Control Diagnostics screen to verify the rear auxiliary thumb paddle switch is reporting correctly.
- If the code is not currently active, treat it as intermittent: recheck all the same connectors and harness runs for loose or corroded connections since the fault may not reproduce on demand.
- If wiring and connectors check out, suspect the left joystick grip or the auxiliary controller itself as the next likely failure point.
How the code clears
Bobcat lists the clearing condition simply as auxiliaries enabled. In practice this means once the underlying issue is fixed (switch released to neutral, connector repaired, or faulty component replaced), the code clears when the auxiliaries are enabled again and the controller confirms the left thumb paddle switch is properly in neutral. No separate reset procedure is listed for this code.
Affected models and serial ranges
H1324 appears in our records across 18 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| E35 | SN A93K110001-99999, SN AC2P11001-99999 |
| E45 | SN AHHC11001-99999 |
| 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 H1324 mean?
It means the auxiliary controller saw that the left thumb paddle switch was not in the neutral position when the auxiliaries were enabled, so it disabled the rear auxiliary outputs as a safety measure.
Why did my rear auxiliaries stop working after H1324?
H1324 specifically disables the rear auxiliary outputs whenever it is active. This is by design: the controller will not let auxiliary functions run if it cannot confirm the switch started in neutral.
Is H1324 caused by the operator or by a wiring fault?
It can be either. Bobcat lists the operator simply holding the left thumb paddle switch out of neutral as the first possible cause, but it also lists faulty wiring, connectors, the joystick grip, and the auxiliary controller as possible causes.
What is the numeric panel code for H1324?
On machines with a numeric panel display, H1324 shows as 13-24.
I am running a radio remote control and got H1324, what should I check?
Bobcat specifically recommends using the diagnostic software's Radio Remote Control Diagnostics screen to verify the rear auxiliary thumb paddle switch is operating correctly when this code appears during remote control use.
The code is not showing now, does that mean it is fixed?
Not necessarily. Bobcat notes that if the code is intermittent and not active at the time of testing, the cause may still be present, commonly loose connections, corrosion, pushed-back pins, the controller, or the wire harness.
Which Bobcat machines can show code H1324?
H1324 is documented across the E35, E45, S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 models.