The automotive wiring harness is the main body of the network of automotive circuits. It is a connection component belonging to the electrical system of the vehicle. A wire harness is a contact terminal (connector) made of copper that is crimped to a wire or cable. The outside is then molded and pressed with an insulator or an additional metal shell. Wire harnesses are assemblies that are bundled to form a connection circuit.

The operating conditions and parameters of the car are reflected visually in the on-board computer through the wiring harness. It can be said to be the nervous system of a car. So it has traditionally been called the “blood vessel” of the car. The electronic content of the wiring harness has gradually become an important indicator for evaluating the performance of a car.