Cable Assembly vs. Wire Harness: What’s the Difference? Cable Assemblies and Wire Harnesses Are Often Confused For Being The Same thing.Cable Assembly vs. Wire HarnessThe Wire HarnessThe Cable AssemblyThe confusion is understandable since many professionals use the terms interchangeably and the products themselves have very similar basic functions. Yet these products are very different from each other, as is their purpose, which means definitions need to be made in order to help people get the products they need. This is a brief explanation of cable assembly vs. wire harness, and how each product is used out in the world.See more on meridiancableassemblies Defining Wire Harness - Wunsch Technologies Defining Wire Harness. To say that cables are to the electric power generation and distribution industry what blood is to man, will be stating the obvious, in very clear and succinct terms. The reliance of electricity on cables as a form of transport is massive.