Komatsu WA600-3 Cab Wiring Harness
Cab Wiring Harness for Komatsu WA600-3, OEM Quality Replacement Part #426-06-22530
Fitment
Fits the Komatsu WA600-3. ECS lists 4 harness sections for this machine — see all 4 sections for the Komatsu WA600-3 before you order, because the sections are not interchangeable.
Part number reference for the 426-06-22530
This harness is one part sold under one number. Suppliers and parts books write it differently — you may see it as 426-06-22530, 4260622530. They are all the same part; the number on the tag of your old harness is what settles the order.
If the tag shows a different number entirely, do not order by eye — send us a photo of it on WhatsApp and we will match it against the catalogue before anything ships.
Where this harness sits on the Komatsu WA600-3
It enters the cab through the floor or the rear wall and runs behind the trim to the switch panel, the operator seat and the HVAC unit.
What it connects
- Switch panel and operator controls — the operator inputs the ECM and the machine monitor need.
- HVAC and wiper circuits — blower, compressor clutch, wiper motor.
- Seat, horn and interior lighting — the small loads that share the cab loom.
What a failing Komatsu WA600-3 harness looks like
| What the operator reports | Why the harness fits that symptom |
|---|---|
| One group of dash functions dead | A branch inside the cab, not the machine harness. |
| Blower or wiper dead while the rest works | A single cab run or its ground. |
| Functions cut out over bumps | Chafing where the loom passes the cab entry. |
| Water in the cab floor after rain | Entry grommet damaged, corrosion following. |
These are circuit-level symptoms, not a diagnosis. The same behaviour can come from a sensor, an ECM input or a mechanical fault — the checks below are how you tell them apart.
How to confirm it is the harness before you buy
- Compare the part number on the old harness. The number is printed on a tag or moulded into the main connector body. If it does not match, stop — stop here and send us a photo, because two sections of the same machine are not interchangeable.
- Resistance test the suspect run. Disconnect both ends and measure end to end. A reading that is far above the others in the same loom means broken strands; a reading to ground means chafing.
- Wiggle test under load. Back-probe the circuit with the machine running and flex the loom by hand along its length, especially at clips and at the cab or boom entry. If the meter or the fault jumps, you have found the run.
Other harness sections for the Komatsu WA600-3
Same type of harness on other machines
Product Description
High-quality cab wiring harness designed for Komatsu WA600-3. This is a complete replacement harness that matches OEM specifications (Part #426-06-22530). All connectors and wiring are tested before shipping. Direct fit installation, no modification required. Made with durable copper wires and heat-resistant insulation for long service life in heavy-duty applications. Factory direct pricing with quality guarantee.
Why Choose ECS System Parts?
- Factory Direct: we build the loom — no middlemen
- In Stock Ready to Ship: most orders leave within 24 hours
- OEM Quality: made to the original drawing, connector for connector
- 1 Year Warranty: full coverage against defects
- Worldwide Shipping: DHL, FedEx, UPS, EMS
- Expert Support: WhatsApp +86-13714733803 — send us a photo of your old harness and we will confirm the section
Technical Specifications
| OEM Part Number | 426-06-22530 |
|---|---|
| Compatible Model | Komatsu WA600-3 |
| Harness Type | Cab Wiring Harness |
| Warranty | 12 Months |
Shipping Information
- DHL / FedEx / UPS / EMS worldwide
- Ships within 24 hours
- 3-7 days express, 7-15 days standard
- Tracking number provided
Return Policy
- 30-day return window
- Must be unused, original packaging
- Contact via WhatsApp for RMA authorization