The COGENG JCB Excavator Wiring Harness Set is a complete collection of premium OEM-grade wiring harnesses specifically engineered for JCB JS200, JS210, JS220, and JS235 excavators. This comprehensive 6-harness set covers the entire machine electrical system including engine control, cab electronics, chassis systems, hydraulics, sensors, and control circuits. Manufactured to meet or exceed original JCB specifications, these durable, plug-and-play harnesses ensure reliable electrical performance, optimal signal integrity, and long service life in demanding construction and excavation applications.
PRODUCT IDENTIFICATION
| Parameter | Harness 1 | Harness 2 | Harness 3 | Harness 4 | Harness 5 | Harness 6 |
|---|---|---|---|---|---|---|
| COGENG Part Number | GG 332/K8925 |
GG 721/112522 |
GG 332/J13663 |
GG 332/J13254 |
GG 332/K2954 |
GG 332/K0486 |
| OEM Equivalent | JCB 332/K8925 | JCB 721/112522 | JCB 332/J13663 | JCB 332/J13254 | JCB 332/K2954 |
JCB 332/K0486 |
| Product Type | Sensor Harness |
Main Harness | Engine Harness | Cab Harness |
Chassis Harness | Control Harness |
| Application | Sensors & actuators | Central hub |
Engine systems | Cab electronics | Chassis & hydraulics | Control circuits |
| Compatible Models | JS200-235 | JS200-235 | JS200-235 | JS200-235 | JS200-235 | JS200-235 |
| Engine Compatibility | JCB / Isuzu | JCB / Isuzu | JCB / Isuzu | JCB / Isuzu | JCB / Isuzu | JCB / Isuzu |
| Brand | Harness 1 | Harness 2 | Harness 3 | Harness 4 | Harness 5 | Harness 6 |
|---|---|---|---|---|---|---|
| COGENG | 332/K8925 | 721/112522 | 332/J13663 | 332/J13254 | 332/K2954 | 332/K0486 |
| JCB | 332/K8925 | 721/112522 | 332/J13663 | 332/J13254 | 332/K2954 | 332/K0486 |
| Interchange | 332/K8926 | 721/112523 | 332/J13664 | 332/J13255 | 332/K2955 | 332/K0487 |
332/K8925 – Main Cab to Chassis Harness
721/112522 – Engine Control Module (ECM) Harness
332/J13663 – Implement (Boom/Arm/Bucket) Valve Harness
332/J13254 – Monitor & Switch Panel Harness
332/K2954 – Transmission / Travel Pedal Harness
332/K0486 – Grounding & Battery Distribution Harness
Supply Format: Complete kit (6 harnesses) or individual components
Minimum Order Quantity (MOQ): 1 complete kit or 5 pieces of any single harness
| Model | Engine | Operating Weight | Application |
|---|---|---|---|
| JS200 | JCB / Isuzu | 20-21 tons | Main harness set |
| JS200LC | JCB / Isuzu | 20-21 tons | Main harness set |
| Model | Engine | Operating Weight | Application |
|---|---|---|---|
| JS210 | JCB / Isuzu | 21-22 tons | Main harness set |
| JS210LC | JCB / Isuzu | 21-22 tons | Main harness set |
| Model | Engine | Operating Weight | Application |
|---|---|---|---|
| JS220 | JCB / Isuzu | 22-23 tons | Main harness set |
| JS220LC | JCB / Isuzu | 22-23 tons | Main harness set |
| Model | Engine | Operating Weight | Application |
|---|---|---|---|
| JS235 | JCB / Isuzu | 23-24 tons | Main harness set |
| JS235LC | JCB / Isuzu | 23-24 tons | Main harness set |
| Engine Model | Displacement | Cylinders | Fuel System | Found In |
|---|---|---|---|---|
| JCB Dieselmax | Various | 4/6-cylinder | Common Rail | JS200, JS210, JS220, JS235 |
| Isuzu 6HK1 | 7.8L | 6-cylinder | Common Rail | JS220, JS235 |
| Isuzu 4HK1 | 5.2L | 4-cylinder | Common Rail | JS200, JS210 |
Note: Verify compatibility with your equipment model, engine serial number, and production year before ordering. Contact COGENG with your machine details for exact application verification.
| Circuit Group | Components Connected |
|---|---|
| Hydraulic Sensors | Main pump pressure, pilot pressure, implement pressure |
| Temperature Sensors | Hydraulic oil temperature, coolant temperature |
| Position Sensors | Boom angle, arm angle, bucket angle |
| Level Sensors | Fuel level, hydraulic oil level |
| Speed Sensors | Engine speed, pump speed |
| Circuit Group | Components Connected |
|---|---|
| Main Controller | VCU / ECU interface |
| Power Distribution | Main fuse box, relays, battery |
| Engine Interface | CAN bus to engine ECU |
| Cab Systems | Display, switches, joysticks |
| Hydraulic Systems | Main control valve solenoids |
| Interface Connectors | To all other harnesses |
| Circuit Group | Components Connected |
|---|---|
| Engine Control (ECU) | Main ECU, power, ground, CAN bus |
| Fuel System | Injectors, fuel pump, rail pressure sensor |
| Timing System | Crank position sensor, cam position sensor |
| Air Intake | Boost pressure sensor, intake air temp sensor |
| Exhaust / EGR | EGR valve, temperature sensors |
| Charging System | Alternator, starter motor |
| Circuit Group | Components Connected |
|---|---|
| Cab Power | Fuse panel, ignition switch, cab lights |
| Instrumentation | Display unit, gauges, warning lights |
| Joystick Control | Pilot control signals (L/R joysticks) |
| Switch Panel | Wiper, lights, beacon, horn, A/C |
| Safety Systems | Seat switch, seatbelt, emergency stop |
| HVAC System | Climate controls, blower motor |
| Circuit Group | Components Connected |
|---|---|
| Hydraulic Control | Main pump solenoids, control valve, pressure sensors |
| Swing System | Swing motor brake solenoid, swing sensors |
| Travel System | Travel motor brake solenoids (L/R), travel sensors |
| Lighting System | Work lights (boom, chassis, cab), beacon, tail lights |
| Safety Systems | Reverse alarm, travel alarm |
| Circuit Group | Components Connected |
|---|---|
| Proportional Control | Pilot proportional solenoids |
| Attachment Control | Auxiliary hydraulic control (breaker, shear) |
| Fine Control Circuits | Precision control circuits |
| Diagnostic Interface | Service port, data link |
| Symptom | COGENG Solution |
|---|---|
| No power / machine dead | New heavy-gauge power cables |
| Engine cranks but no start | New CAN bus twisted pair |
| Engine runs rough / misfire | New injector harness |
| Reduced power / derate | New sensor circuits |
| No communication with ECU | New twisted pair CAN lines |
| Check engine light on | Complete harness replacement |
| Symptom | COGENG Solution |
|---|---|
| Blank / dead display | New cab power circuits |
| Joystick no response | New pilot control circuits |
| Switches not responding | New switch panel wiring |
| Wipers intermittent | New wiper control wiring |
| Symptom | COGENG Solution |
|---|---|
| No hydraulic response | New solenoid circuits |
| Swing not working | New swing control wiring |
| Travel issues | New travel control wiring |
| Work lights not working | New power circuits |
| Symptom | COGENG Solution |
|---|---|
| Pressure sensor errors | New shielded sensor wiring |
| Attachment not working | New auxiliary control circuits |
| Intermittent operation | New secure connections |
| Symptom | COGENG Solution |
|---|---|
| Rodent damage | New complete harness set |
| Chafed / exposed wires | New conduit protection |
| Corroded connectors | New sealed connectors |
| Burnt / melted wires | New properly rated wires |
| Broken wires at connector | New strain relief |
Full pinout diagrams are provided as a laminated A3 poster with every kit. Below is a summary.
| Harness | Connector Name | Pin Count | Key Signals (Pin # → Function) |
|---|---|---|---|
| 332/K8925 | Cab bulkhead (chassis side) | 24 | 1-Battery +12V, 2-Ground, 3-CAN H, 4-CAN L, 5-Key Sw, 6-Starter relay |
| 721/112522 | ECM (70-pin) | 70 | A1-Batt+, A2-Gnd, B3-Inj1 drive, C12-Crank sensor+, D8-CAN H, E5-Throttle PWM |
| 332/J13663 | Swivel joint (upper) | 15 | 1-Boom extend, 2-Boom retract, 3-Arm in, 4-Arm out, 5-Bucket curl, 6-Bucket dump, 7-Swing L, 8-Swing R |
| 332/J13254 | Monitor | 20 | 1-Batt+, 2-Gnd, 3-CAN H, 4-CAN L, 5-Key Sw (ACC), 6-Beacon Sw, 7-Wiper Hi/Lo |
| 332/K2954 | Left travel pedal | 6 | 1-Sensor 5V, 2-Sensor Gnd, 3-Fwd signal (0-5V), 4-Rev signal (0-5V), 5-Fwd solenoid, 6-Rev solenoid |
| 332/K0486 | Ground bus bar | 6 studs | Stud1-ECM Gnd, Stud2-Sensor Gnd, Stud3-Valve Gnd, Stud4-Lighting Gnd, Stud5-Monitor Gnd, Stud6-Chassis Gnd |
Q: What JCB models use the 332/K8925 wiring harness?
A: The COGENG 332/K8925 (also referenced as 332K8925) wiring harness is a direct OEM replacement specifically designed for JCB JS200, JS210, JS220, and JS235 excavator models. This harness serves as a critical electrical connection within the machine's electrical system. Always verify this part number against your machine's parts manual or the original harness tag to confirm exact compatibility before ordering, as harness configurations can vary by serial number range and machine options.
Q: What are the symptoms of a failing wiring harness on a JCB JS series excavator?
A: Common symptoms include intermittent electrical faults, multiple warning lights illuminated on the display panel, unresponsive hydraulic or engine controls, erratic gauge or sensor readings, CAN bus communication errors, specific functions not responding, or unexpected machine shutdowns. JCB JS series excavators rely on stable electrical connections for control module communication, and harness degradation from heat, vibration, and moisture ingress can cause widespread operational issues.
Q: Is this harness a direct plug-and-play replacement?
A: Yes, the COGENG 332/K8925 harness is manufactured to exact OEM specifications for connector types, pin assignments, wire gauge, and routing length. It is a durable, direct plug-and-play replacement requiring no wire splicing, soldering, or modifications when installed on compatible JCB JS200, JS210, JS220, or JS235 excavators.
Q: What is the warranty coverage for this wiring harness?
A: COGENG provides a standard 12-month warranty against manufacturing defects from the date of installation. Proof of purchase and installation by a qualified technician are required. Warranty does not cover damage caused by improper installation, unauthorized modifications, rodent damage, or use on incompatible equipment.
Q: Does COGENG offer technical support for installation or troubleshooting?
A: Yes, COGENG provides complimentary technical support to assist with installation guidance and basic troubleshooting. For complex electrical diagnostics on JCB JS series excavators, we recommend consulting a certified JCB service technician.
Q: How is the wiring harness packaged and shipped?
A: Each COGENG 332/K8925 wiring harness is individually packaged in a heavy-duty, moisture-resistant corrugated carton with custom foam inserts to prevent connector damage and wire kinking during transit. All connectors are capped and bagged for additional protection. Global shipping options are available, including air freight, sea freight, and international express couriers. In-stock items ship promptly for minimal downtime. Factory direct shipping ensures the product reaches you in optimal condition.
Contact COGENG
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