Bobcat H2632 (26-32) Fault Code: Front Base Solenoid Over Current
Also shown on the panel as 26-32 · Also called Front Base Output Overcurrent
Front Base Solenoid Over Current · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
H2632, shown on some panels as 26-32, means the auxiliary controller (or deluxe MX controller on some machines) detected too much current through the front base solenoid return wire and shut that solenoid output off to protect itself. It sets with the key switch or run/enter switch on, and clears by cycling power once the wiring or component problem is fixed.
Medium severity. The front base solenoid is disabled while this code is active, so that attachment function will not work. It is not an engine-damage or safety-shutdown event by itself, but you should not keep cycling the switch repeatedly hoping it clears, since a real short can eventually damage the controller's output driver.
What does Bobcat error code H2632 mean?
A code H2632 occurs when the auxiliary controller (or deluxe MX controller, depending on machine) detects that the current being drawn through the front base solenoid return wire is greater than the controller can safely handle without damaging the output driver. When this happens, the front base solenoid is disabled until the fault is cleared.
On most affected machines this return wire is numbered 2340, paired with signal wire 4340. On machines using the deluxe MX controller, the equivalent wires are 2100 and 4100. Either way, the logic is the same: too much current flowing back through that circuit trips an overcurrent protection in the controller.
This code is specific to the front base solenoid circuit only. If it sets, expect the front base attachment function to stop responding until the fault is found and power is cycled.
Common causes of H2632
- Return wire (2340, or 2100 on deluxe MX controller machines) shorted to supply voltage, or shorted to the paired signal wire (4340 or 4100).
- A failed front base solenoid.
- A failed auxiliary controller or deluxe MX controller.
- Moisture, corrosion, or pushed-back pins in the controller connectors, the front base solenoid connector, the mainframe harness, or on deluxe MX machines the power and control harnesses.
- An intermittent fault where the cause cannot be confirmed if it is not active at the time of testing. Probable causes in that case include loose connections, corrosion, pushed-back pins, the controller itself, the wire harness, or a combination of these.
How to troubleshoot Bobcat H2632: first checks
- With the key switch or run/enter switch on, check for the code and note whether it is currently active or intermittent, since that changes your diagnostic approach.
- Inspect the front base solenoid connector, the auxiliary or deluxe MX controller connectors, and the mainframe harness (or deluxe MX power and control harnesses) for moisture, corrosion, or pushed-back pins.
- Check return wire 2340 (or 2100 on deluxe MX machines) for a short to supply voltage or a short to its paired signal wire, 4340 or 4100.
- Test the front base solenoid itself for an internal short or failure.
- If no fault is found and the code is not active at the time of testing, treat it as intermittent and recheck all connections, since loose pins or harness damage can cause an on-again, off-again fault.
How the code clears
Once the wiring, solenoid, or controller problem is repaired, clear code H2632 by cycling power (turning the key switch or run/enter switch off, then back on). No separate reset procedure is listed for this code beyond cycling power.
Affected models and serial ranges
H2632 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 H2632 mean?
It means the auxiliary controller (or deluxe MX controller on some models) detected excess current on the front base solenoid's return wire and disabled that solenoid to protect its output driver from damage.
What is the panel display version of H2632?
On some Bobcat display panels this code shows as 26-32 instead of H2632. They refer to the same fault.
Will my front base attachment work with this code active?
No. When H2632 is active, the front base solenoid is disabled, so the front base function will not operate until the fault is fixed and power is cycled.
What usually causes this code?
The most common causes are a short on the return wire (2340 or 2100 depending on controller) to supply voltage or to its paired signal wire, a failed front base solenoid, a failed controller, or corrosion and pushed-back pins in the connectors and harness.
How do I clear H2632 after repair?
Cycle the key switch or run/enter switch off and back on. That is the only clearing step listed for this code.
The code only shows up sometimes. What should I do?
Treat it as intermittent. If it is not active when you test, the exact cause may not be identifiable right away. Check all connectors and harness sections for loose connections, corrosion, and pushed-back pins, since these are the most common intermittent culprits.
Which Bobcat machines can show code H2632?
It applies across a range of Bobcat compact excavators and skid steer or track loaders, including the E35, E45, S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T870.