[PDF] AN INTRO TO Wiring Harnesses AN INTRO TO Wiring Harnesses An Introductory Guide for Engineers Designing Aircraft Wiring Harnesses January 1, 2014 • The next piece of information you need is the wiring harness military specification that most military aircraft comply with. This transferred from the US Navy to the Society of Automotive Automotive | Wiring Harness Manufacturer's Association The Wiring Harness Manufacturer’s Association . Manufacturer Members understand the critical role that the wire harness plays in the vehicle. It is a set of wires, connectors, and terminals that transmits information and electric power to deliver function to the vehicle. An average car uses many wires, when stretched out, they can extend for miles.