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259-5068 275-6732 External Wiring Harness As-chassis for Cat Caterpillar Excavator E345C C13
If diagnosis has led you to the wiring, the 259-5068 275-6732 External Wiring Harness gives you a complete, new harness for Caterpillar 345C, 345D, E345C excavators instead of a patchwork of repairs on old, brittle wire.
Designed around the C13, C11 engine configuration, it connects to the same points as the factory harness.
Part Information
- Part Name: External Wiring Harness
- Part Number: 259-5068, 275-6732, 2595068, 2756732
- Engine: C13, C11
- Condition: Aftermarket new
- Product Weight: 11 kg / 24.25 lbs
- Brand: TOPARTS
- Feature: Quality checked before shipping; built for heavy-duty use
Applicable Models
Caterpillar Engine C13 C11 Excavator 345C 345D
What This Harness Does
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.
This is the backbone of the machine's electrical system. The External Wiring Harness runs along the frame and upper structure, distributing power from the batteries and fuse box and carrying signals between the cab, the engine compartment, the hydraulic system and the work lights.
On Cat equipment, a damaged harness often shows up as active diagnostic codes before any visible failure, so replacing the wiring can clear problems that look like sensor or ECM faults.
Warning Signs to Watch For
Common warning signs are:
- Hydraulic functions slowing down or stopping because solenoids lose signal
- Work lights, horn or wipers working only some of the time
- Rodent damage, crushed sections or wires worn through where the harness rubs the frame
- Several unrelated circuits failing at once
- Monitor warnings that disappear when the machine is stopped
When diagnostics point to a circuit fault rather than a failed component, replacing the wiring is often the most cost-effective repair.
What You Get with TOPARTS
The goal is simple: a harness that fits like the original and keeps working like it. Matching connectors, correct branch lengths and durable insulation mean stable performance and high reliability in daily heavy-duty use.
Before and During Installation
- 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.
- Add protective sleeving wherever the old harness showed signs of rubbing.
- Test lights, horn, solenoids and the monitor before refitting covers.
Keeping the New Harness in Good Shape
Avoid aiming a pressure washer directly at connectors and the ECM. Water forced past the seals is a common cause of corrosion and intermittent faults. A light spray and a dry cloth are kinder to the electrical system.
Confirming Fitment
The fastest way to confirm fit is to match the part number 259-5068 275-6732 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.
