The automobile wiring harness is the network main body of the automobile circuit, and there is no automobile circuit without the wiring harness. Wire harness refers to the contact terminal (connector) punched from copper material and the wire and cable after being crimped, and then the outside is re-molded with an insulator or an external metal shell, etc., and the wire harness is bundled to form a component that connects to the circuit. In modern cars, there are many automotive wiring harnesses, and the electronic control system is closely related to the wiring harness. If the functions of the microcomputer, sensors and actuators are compared to the human body, it can be said that the microcomputer is equivalent to the human brain, the sensor is equivalent to the sensory organ, the actuator is equivalent to the motor organ, then the wiring harness is equivalent to the nerve and blood vessel.