The automobile wiring harness is the main body of the automobile circuit, and there is no automobile circuit without the wiring harness. Wire harness refers to a component that is formed by crimping contact terminals (connectors) made of copper material with wires and cables, and then plastic insulators or metal shells are added to the outside to form a connected circuit. The wiring harness industry chain includes wire and cable, connectors, processing equipment, wiring harness manufacturing and downstream application industries. The wiring harness is widely used and can be used in automobiles, household appliances, computers and communication equipment, various electronic instruments, etc. The body wiring harness connects the entire body , The general shape is H-shaped.

The arrangement method of automobile wiring harness is as follows:

Before arranging the wiring harness, the wiring harness diagram must be drawn in advance. The wiring harness diagram is different from the circuit schematic diagram. The circuit schematic diagram is an image that expresses the relationship between the various electrical parts. It does not reflect how the electrical components are connected to each other, and is not affected by the size and shape of the various electrical components and the distance between them. The wiring harness diagram must take into account the size and shape of each electrical component and the distance between them, and also reflect how the electrical components are connected to each other.

After the technicians of the wiring harness factory make the wiring harness wiring board according to the wiring harness diagram, the workers cut the wiring wiring according to the regulations of the wiring board. The main wiring harness of the whole vehicle is generally divided into engine (ignition, electronic injection, power generation, starting), instrumentation, lighting, air conditioning, auxiliary electrical appliances, etc. There are main wiring harness and branch wiring harness. A whole vehicle main wiring harness has multiple branch wiring harnesses, just like tree poles and branches. The main wiring harness of the whole vehicle often takes the instrument panel as the core part and extends forward and backward. Due to the length or convenience of assembly, some automobile wiring harnesses are divided into front wiring harness (including instrumentation, engine, headlight assembly, air conditioner, battery), rear wiring harness (tail light assembly, license plate light, luggage compartment light), roof Wiring harness (car door, ceiling light, audio speaker), etc. Each end of the wire harness will be marked with a logo number and letter to indicate the connection object of the wire. The operator can see that the logo can be correctly connected to the corresponding wire and electrical device, which is particularly useful when repairing or replacing the wire harness. At the same time, the color of the wire is divided into a single color line and a two-color line, and the use of the color is also specified, which is generally a standard set by the car factory. my country's industry standards only stipulate the main colors. For example, it is stipulated that single black is used for grounding wires, and red single color is used for power wires.

The wire harness is wrapped with woven thread or plastic tape. For safety, processing and maintenance convenience, woven thread wrapping has been eliminated, and now it is wrapped with viscous plastic tape. The connection between the wire harness and the wire harness, and between the wire harness and the electrical parts, adopts connectors or wire lugs. The connector is made of plastic and has a plug and a socket. The wiring harness and the wiring harness are connected by connectors, and the connection between the wiring harness and the electrical parts is connected by connectors or wire lugs.