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0001044 4296401 Internal Wiring Harness for Hitachi Excavator EX100-2 EX120-2 EX100-3
Keep your Hitachi EX100-2 EX120-2 working with the TOPARTS 0001044 4296401 Internal Wiring Harness. It replaces the original harness one-for-one and is built for the vibration, heat and dirt that come with daily work on site.
Its Role in the Machine
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.
Protected from weather but not from wear, the cab harness flexes every time a seat is adjusted, a console is moved or a panel is opened. Over the years, these small movements loosen terminals and fatigue wires, especially behind the seat and under the floor plate.
Hitachi ZAXIS and EX series machines combine electronic engine control with electronically managed hydraulics, so both systems depend on sound wiring to deliver their rated performance.
What You Get with TOPARTS
TOPARTS harnesses are made to the original layout so that every connector reaches its component without strain. Protective conduit and tape guard the wires against abrasion, heat and oil in the engine bay and around the frame.
Signs Your Harness Needs Replacing
Common warning signs are:
- Key switch or start circuit failing intermittently
- Faults that appear when the seat or console is moved
- Burnt smell or discoloured connectors behind panels
- Monitor flickering, going blank or resetting while working
- Joystick or work mode functions not responding
If these symptoms persist after checking fuses, batteries and grounds, the wiring itself is the next thing to suspect.
Installation Tips
- 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.
Why a New Harness Beats Patching
A single visible fault is often a sign of wider ageing. Heat cycling and vibration affect every wire in the bundle, not just the one that failed. Fitting a new harness means you are not chasing the next fault next month.
FAQ
Do I need special tools to install it?
Standard hand tools are usually enough. Labelling connectors and taking photos before removal makes the job much easier.
Is this harness plug-and-play?
Yes. It is built to the original layout with matching connectors, so it installs in place of the original without cutting or splicing.
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.
Product Details
- Part Name: Internal Wiring Harness
- Part Number: 0001044, 4296401
- Condition: Aftermarket new
- Product Weight: 7.5 kg / 16.53 lbs
- Brand: TOPARTS
- Feature: Original connector layout; plug-and-play installation
Fits the Following Machines
Hitachi Excavator EX100-2 EX120-2 EX100-3 EX120-3
Ordering Information
- 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.
