0001859 External Wiring Harness for Hitachi Excavator EX220-3 EX200-3
When the original harness on your Hitachi EX220-3 ex200-3 has worn out, the 0001859 External Wiring Harness is a straightforward way to get the machine back to full function. It is made to the same layout as the original, with matching connectors at every branch.
Part Information
- Part Name: External Wiring Harness
- Part Number: 0001859
- Condition: Aftermarket new
- Product Weight: 7 kg / 15.43 lbs
- Brand: TOPARTS
- Warranty: 6 months
- Feature: Original connector layout; plug-and-play installation
Compatible Models
Hitachi EX220-3, ex200-3, etc
Why This Harness Matters
Because it runs through the most exposed areas of the machine, the main harness takes more abuse than almost any other electrical part. Swinging, vibration, dust, washdowns and rodents all take their toll, which is why it is one of the most commonly replaced harnesses on older machines.
Laid out around the frame and through the house of the excavator, this harness is the long-distance carrier of the electrical system. It ties together the cab controls, controllers, pump and valve solenoids, sensors and lighting into one connected network.
Hitachi excavators are popular on the used market, and harness replacement is one of the most effective ways to restore an older Hitachi to dependable everyday use.
Installation Guide
- Disconnect the battery isolator before starting.
- Work section by section, transferring clips and ties as you go, rather than removing the whole harness at once.
- Check every ground strap and clean its contact surface to bare metal.
- Test lights, horn, solenoids and the monitor before refitting covers.
Repair vs. Replacement
Splicing a damaged section can get a machine moving again, but each joint is a new point of failure. Old wire around the repair is usually just as aged as the part that broke, so the next fault is often not far away. A complete new harness resets the clock on the entire circuit.
The Cost of Waiting
An excavator sitting idle waiting for parts costs money every hour. Having the correct harness on hand means the repair becomes a scheduled job instead of an emergency, and the machine is back at work as soon as installation is finished.
When to Replace It
You may notice:
- Rodent damage, crushed sections or wires worn through where the harness rubs the frame
- Work lights, horn or wipers working only some of the time
- Blown fuses that keep recurring with no obvious cause
- Starting problems traced to wiring rather than the battery or starter
When diagnostics point to a circuit fault rather than a failed component, replacing the wiring is often the most cost-effective repair.
Frequently Asked Questions
Is this a genuine or aftermarket part?
Please see the Condition line in the specifications above. Every part is checked for fit and continuity before shipping.
What should I do if the part does not match?
Contact us with photos of the original and the new part. We will help you resolve the issue quickly.
How long does shipping take?
Orders are shipped by express courier such as DHL, FedEx, UPS or TNT, and you will receive a tracking number by email as soon as your parcel leaves our warehouse.
Payment & Shipping
- Payment Method: PayPal, Stripe, Credit card, Visa, etc.
- Shipping Method: DHL, FedEx, UPS, TNT, USPS EMS, etc.
- Track Your Order: An email containing the tracking number with a link will be sent to you as soon as it ships.
Note: Please verify your part number and match our product pictures to your original item before ordering. If you have any questions, please feel free to contact us. Thanks.

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