The car wiring harness is composed of copper connectors (plugs, sockets), plastic sheaths, wires, etc., responsible for transmitting and exchanging power and data signals of the electrical system in the entire vehicle, thereby achieving the functions and requirements of the electrical system. In addition, car wiring harnesses are similar to the human nervous system, mainly responsible for the transmission of electronic signals, controlling various components of the car through signal transformation and transmission. In short, car wiring harnesses are the core component of electronic control and circuit applications within the car.