230-6279 CAT C9 Engine Wiring Harness Replacement for Caterpillar E330C Excavator

230-6279 CAT C9 Engine Wiring Harness (Aftermarket) | 2306279 | Fits 330C / E330C

This product is an aftermarket replacement wiring harness for Caterpillar 230-6279 (2306279), commonly used on CAT C9 engine applications including 330C / E330C excavators. In Cat parts catalogs, 230-6279 is described as an External Harness Assembly (C9) (Electronic Control).

When to Replace the Wiring Harness

• Intermittent shutdown / unstable signals

• Sensor fault codes and warning lights

• Blown fuses / short circuits due to rubbed wires

• Connector corrosion, oil contamination, broken pins

• Melted insulation near high-temperature areas

Fitment Verification (Recommended)

Because harness layouts can vary by configuration and year, please send:

1. Machine model + serial number

2. Photos of the old harness overall layout

3. Connector photos (pin count/shape) and branch photos
   We will confirm compatibility and reply with quotation and lead time.

Installation Notes

• Disconnect battery before installation

• Match connectors by shape and locking clip (do not force fit)

• Secure with clamps to prevent rubbing and heat damage

• Recheck fuses/grounds after installation

FAQ

Q1: Is 230-6279 the same as 2306279?

A: Yes, 2306279 is the same number without hyphens.

Q2: Why is it called “External Harness Assembly”?

A: Cat Parts Store lists 230-6279 as External Harness Assembly (C9) (Electronic Control). 

Excavator 330C LN 330C 330C FM 330C MH 330C L 330C

CHALLENGER 65C 65D MTC755 MTC735 MT765 MT745 MTC765 MTC745 MT755 MT735

AUTOGRAIDER 12H 

INDUSTRIAL ENGINE C-9 

FORESTRY EQUIPMENT TK752 TK751 TK711 TK732 TK741 TK722 TK721