The car wiring is the network body of the car circuit, connecting the electric electronic parts of the car and making it work. There is no wiring and there is no car circuit. At present, whether senior luxury car or economical ordinary cars, wiring harness plait is basically the same, in the form of are composed of wire, al plug-in and parcel tape, it should not only ensure transmit electrical signals, also want to ensure the reliability of the connection circuit, to supply electrical components as prescribed by the current value, preventing electromagnetic interference of peripheral circuit, and to exclude the electrical short circuit.