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 Wire Harness vs. Cable Assembly - What You Need To Know Wire Harness vs. Cable Assembly – Understanding the Differences. Wire harnesses and cable assemblies are used to power many different electrical devices. They’re so common that these two terms are often used interchangeably. You may come across technicians and other personnel referring to a wire harness as a cable assembly, and vice versa.