Wire harness is the main network of automobile circuit. The wire harness connects the electrical and electronic components of automobile and makes them function. Without harness, there will be no automobile circuit. At present, whether it is a high-end luxury car or an economical ordinary car, the wiring harness is basically in the same form, which is composed of wires, connectors and wrapping tape. The wire harness should not only ensure the transmission of electrical signals, but also ensure the reliability of the connecting circuit, supply the specified current value to the electronic and electrical components, and prevent electromagnetic interference to the surrounding circuits, And eliminate the electrical short circuit. In terms of function, the automobile harness can be divided into two types: the power line carrying the power of the driving actuator (actuator) and the signal line transmitting the input command of the sensor. The power line is a thick wire that carries large current, while the signal line is a thin wire that does not carry power (optical fiber communication); For example, the cross-sectional area of the wire used in the signal circuit is 0.3 and 0.5mm.(the wire harness)、
