The Automotive wiring harness is the main body of the automobile circuit. Wiring harness refers to the component in which the contact terminal (connector) made of copper material is crimped to the wiring harness cable, and then attached to an external molded insulator or metal shell, and the wiring harness is bundled to form a connecting circuit.

The wire harness industry chain includes wire harness cable, connector, processing equipment, harness manufacturing and downstream application industries. The wire harness is widely used in automobiles, household appliances, computer and communication equipment, various electronic instruments and meters, etc. the whole body shape of the body is usually H-shaped.

In modern automobile, there are many automobile wiring harness, and electronic control system is closely related to wiring harness. Some people used the image analogy: if we compare the functions of microcomputer, sensor and actuator with human body, we can say that microcomputer is equivalent to human brain, sensor is equivalent to sensory organ, and actuator is equivalent to moving organ, and then the wiring harness is nerve and blood vessel.

Automobile wiring harness is the main body of automobile circuit. It connects the electrical and electronic components of the car and makes them work. No wiring harness, no car circuits. At present, whether it is a high-end luxury car or an economic ordinary car, the form of wiring harness is basically the same. It consists of wire harness, connector and packing tape. It must ensure the transmission of electrical signals and the connection of circuits. Reliability, provide specified current value for electrical and electronic components, prevent electromagnetic interference to surrounding circuits, and eliminate electrical short circuit.

The automotive wiring harness is functionally divided into a power line that carries the power used to drive the actuator (actuator) and a signal line that transmits sensor input commands. For example, the cross-sectional area of conductor of signal circuit is 0.30 × 17760.5mm 2.

The cross-sectional area of the wire harness is 15.5mm2, 2.5mm2 and 8.5mm2, and the cross-sectional area of the wire harness is 1.5mm2, 2.5mm2 and 8.5mm2 for the power supply, and the cross-sectional area is 1.5mm2, 2.5mm2 and 8.5mm2 for the power supply. The larger the cross-sectional area of the conductor, the greater the current capacity. In addition to considering the electrical performance, the selection of wiring harness also depends on the physical characteristics of the vehicle, so the selection range is very wide.

For example, frequent door opening / closing in taxis and wiring harness on the body should consist of wires with good bending performance. For the wires used in high temperature parts, the wires coated with vinyl chloride and polyethylene are usually used, which have excellent insulation and heat resistance. In recent years, electromagnetic shielding wires for weak signal circuits are also increasing.

With the increase of automobile function and the popularization and application of electronic control technology, more and more electronic components and wiring harness will be more and more. The number and power consumption of automobile circuits will be greatly increased, and the wiring harness will become more and more heavy. This is a big problem to be solved. How to arrange a large number of wiring harness more effectively and reasonably in the limited carriage, so that the automobile wiring harness can play a greater role has become a problem faced by the automobile manufacturing industry.

Car safety belt is divided into body safety belt and engine harness, as well as headlight harness. The harness is used to connect all sensors and equipment on the car to the computer and send signals to the computer.