When watching an operator test an automotive wire harness, one is reminded of old-time photos and TV skits about telephone switchboard operators of the 1950s and 1960s. They were able to plug and pull cords into and out of jacks quickly and accurately.
Today’s test operators are just as fast. Partly this is due to the high volume of wire harnesses Tier 1 and Tier 2 suppliers must assemble and test on a daily basis.