A Wire Harness, also known as a cable harness or wiring assembly, is a grouping of wires, cables, or subassemblies designed to transmit signals or electrical power. A basic Wire Harness may include as few as three discrete components, while the more classic harnesses include many more wires and other passive, and potentially active, components.
A Wire Harness is often confused with a cable assembly; the main difference between the two is that a cable assembly usually has just two ends while a wire harness has multiple branches/ends running off in many different directions with multiple terminations on each branch.
Wire Harness Testing
Testing the electrical functionality of a wire or cable harness can be done with the aid of a test board. The test board is pre-programmed with the required electrical characteristics, and the completed harness can be plugged into the test board and tested individually or in multiple numbers.
Remark: Quoted from EPEC