What are the functions of wiring harnesses in cars?

What are the functions of wiring harnesses in cars? To facilitate the installation of car circuits, arrange them neatly, protect insulated wires, and ensure the safety of the car. Use high voltage, battery and starter cables to wrap all wiring on the car with cotton yarn or fine PVC tape. The harness consists of wires of different specifications and properties. The main specifications and performance requirements are as follows:
1. Cross-sectional area of conductor
The cross-sectional area of the conductor should be selected according to the load and current of the electrical equipment. The general principle is that electrical equipment with long working hours can choose 60 for the actual current, while electrical equipment with short working hours can choose 60 to 100 for the actual current.
2, the color of the wire
Car circuits have color and serial numbers, and the number of conductors increases with the addition of car electrical equipment. In order to facilitate identification and maintenance of car electrical equipment, low-voltage wires in car circuits are usually composed of wires of different colors, and color-coded letters are marked on the car's PRZEWOD chart. When displaying a circuit diagram of a car conductor that is usually marked with a one - or two-letter color code, the car color of the wire is usually different, and there are two common principles of monochrome and color selection. For example: Red R, black B, white W, green G, yellow Y, black and white BW, red and yellow RY. Among them, the color line is the former, the latter is the complementary color.
3. Physical properties of silk
When bending, the metal wire between the door and the door body should be made of well-bent metal wire. The wire is used for high temperature and high temperature resistant parts. Usually, vinyl chloride and polyethylene coated wire with good insulation and heat resistance is used. In recent years, electromagnetic shielding circuits using weak signal lines have also increased.
4. Binding of wiring harness
The harness uses half-folded packaging, painting, drying and other processes to improve cable strength and insulation. A new type of wiring harness, partly wrapped in plastic, is placed in a side-cut plastic bellows, making it stronger, more protective, and easier to spot faulty lines.