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0001302 Internal Wiring Harness for Hitachi Excavator EX400-3
Restore reliable electrical performance to your Hitachi EX400-3 EX400-3C with the 0001302 Internal Wiring Harness. Built as a direct replacement for the original part, it matches the factory routing, connector layout and length, so it goes in where the old one came out.
Product Details
- Part Name: Internal Wiring Harness
- Part Number: 0001302
- Condition: Genuine new
- Product Weight: 10.5 kg / 23.15 lbs
- Brand: TOPARTS
- Feature: Original connector layout; plug-and-play installation
Compatible Models
Hitachi Excavator EX400-3, EX400-3C
Function Overview
The internal harness lives inside the operator's cab and connects everything the operator touches and sees: the monitor, switch panels, joysticks, key switch, controllers and relays. It is the link between the operator's commands and the rest of the machine.
Inside the cab, this harness ties the monitor panel, controller, key switch and control switches into one circuit network. When it starts to fail, the first signs are usually in the cab itself: dead switches, flickering displays or controls that respond only some of the time.
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
- Remove the seat or console covers as needed to get clear access.
- Unplug the monitor and controller connectors carefully and check their locking tabs.
- Route the harness exactly as the original to avoid pinching under floor plates or seat rails.
- Test every switch and the monitor before refitting the panels.
The Cost of Waiting
Electrical problems tend to get worse rather than better. Replacing a deteriorating harness at a planned service interval is far cheaper than dealing with a breakdown in the middle of a job, especially on remote sites.
Common Symptoms of a Failing Harness
Common warning signs are:
- Burnt smell or discoloured connectors behind panels
- Faults that appear when the seat or console is moved
- Key switch or start circuit failing intermittently
- Switches on the console that do nothing or work only sometimes
When diagnostics point to a circuit fault rather than a failed component, replacing the wiring is often the most cost-effective repair.
Maintenance Advice
Once the new harness is fitted, a quick look during routine services goes a long way. Check for rubbing points, loose clamps and oil contamination, and keep the engine bay and battery area clean so that debris does not build up around the wiring.
Make Sure It Fits
The fastest way to confirm fit is to match the part number 0001302 against the tag on your old harness or your parts book. If the tag is missing or unreadable, a few clear photos of the connectors are usually enough for us to identify the right part.
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.
