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20555343 VOE20555343 Engine Wiring Harness for Volvo EC135B EC140B EC160B Excavator
When the original harness on your Volvo EC135B EC140B has worn out, the 20555343 VOE20555343 Engine 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.
Why This Harness Matters
Every start, every throttle change and every load the excavator takes on is managed through this harness. It routes power and data between the ECM and the engine-mounted components, so a single damaged wire here can show up as a problem anywhere in the engine's behaviour.
Think of this harness as the communication line of the engine. Speed sensors, temperature senders, pressure switches and fuel system components all report back through it, and the controller sends its commands out along the same path.
On Volvo machines, wiring problems often appear as communication or sensor faults on the display. A new harness removes the wiring as a variable in the diagnosis.
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.
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.
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.
When to Replace It
Common warning signs are:
- Gauges for engine temperature or oil pressure reading erratically
- Sudden loss of power or the engine entering a derated mode
- Fault codes for sensors, injectors or the ECM appearing on the monitor
- Engine cranks but will not start, or starts only after several attempts
- Engine stalling, misfiring or running roughly at idle
When diagnostics point to a circuit fault rather than a failed component, replacing the wiring is often the most cost-effective repair.
Installation Tips
- Label each connector on the old harness with masking tape before you unplug anything.
- Photograph the routing, clip positions and ground points from several angles.
- Clean and inspect the ECM connector pins; bent pins cause more faults than people expect.
- Keep the new harness clear of the exhaust manifold and turbocharger, and refit all heat shields.
- Clear stored fault codes after installation and run the engine to working temperature to confirm everything reads correctly.
Replace or Repair?
Harness repairs are hard to do well in the field. Moisture gets into joints, tape loosens with heat, and intermittent faults come back. Replacing the harness gives you factory-style connections throughout and makes future troubleshooting far simpler.
Specs at a Glance
- Part Name: Engine Wiring Harness
- Part Number: 20555343, VOE20555343
- Condition: Aftermarket new
- Product Weight: 4 kg / 8.82 lbs
- Brand: TOPARTS
- Warranty: 6 months
- Feature: Original connector layout; plug-and-play installation
Fits the Following Machines
Volvo EC135B EC140B EC160B Excavator
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.
