The automobile wiring harness is the main body of the automobile circuit network, which connects the electrical and electronic parts of the automobile and enables them to function. There is no automobile circuit without the wiring harness. 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.
Car wiring harness from the function of the division, there are two kinds of carrier drive actuator (actuator) electric power line and signal line transfer sensor input instructions. Power lines are thick wires that carry large currents, while signal lines are thin wires that carry no electricity (fiber optic communications). For example, the cross-sectional area of the wire used in the signal circuit is 0.3 and 0.5mm2.