Car wiring harness is the car circuit components of the carrier, someone once made an image metaphor, car wiring harness is a blood vessel, car engine is the heart, the heart beats because of blood vessels, the engine runs because of wiring harness, it can be seen that the car wiring harness on the car circuit normal and stable importance. Therefore, it is necessary to understand the product and process knowledge of car wiring harness.

Car wiring harnesses can be divided into main line harnesses and small wiring harnesses. The main harness includes engine harness, center box harness, instrument panel harness, cockpit harness, etc. The small wiring harness includes door wiring harness, battery wiring harness, ABS brake wire harness and so on. In addition, according to the voltage difference, car wiring harnesses can be divided into high-voltage wiring harnesses and low-voltage wiring harnesses. Car high-voltage wire Z is characterized by high voltage and low current, high insulation function requirements, so the insulation layer is often thick and the core wire is relatively thin.

Wire harness refers to the component of the wire and cable that is crimped by the touch piece terminal (adapter) made of copper material, and then plasticized and pressed insulator or external metal shell, etc., and tied with the wire harness to form the connecting circuit. In short, it is the wiring that connects the electrical appliances of the car. The operating conditions and parameters of the car are reflected in the on-board computer through the wiring harness. On the other hand, the electronic technical content of car wiring harness has become an important target for evaluating car functions.

With the development of car electronics, economy, comfort, reliability, etc., will become more and more prominent, and the requirements for wiring harnesses are gradually rising. Domestic car wiring harness shopping malls will gradually transform from low-cost strategic shopping malls to more cost-effective shopping malls with higher technical content. Car wiring harnesses are also developing in the direction of high pressure, lightweight and standardization.

Car wiring harness production process mainly includes wiring, crimping, preassembly, assembly, etc. The primary data of wiring harness is heat shrink data, which is an important insulation data in car wiring harness. The proportion of domestic heat shrink data used in car manufacturing is still very low, only about 20%. It is worth mentioning that 80% of the world's shopping malls are occupied by the United States Raychem and Japan's Sumitomo.