Automobile wiring harness processing materials mainly include wire, terminal, sheath, tape, PVC pipe, and some auxiliary materials, such as: packaging, protective materials and so on.

　　The most commonly used materials for electric wires are: QBV, QVR, AVS, AVSS, etc., which are the main materials for automobile wiring harness. Many friends may not know about these titles, but here is just one example. Q for road vehicle wire, B for thin wall insulation, VV for PVC insulation, PVC sheath. The terminal is the key material to connect the car harness.

　　There are two kinds of sheaths: plastic sheaths and rubber sheaths. Plastic sheaths are used for connecting wiring harnesses to wiring harnesses or connecting wiring harnesses to electrical appliances on vehicles. Rubber sheaths are used for vehicle body through hole positioning or for wire harness waterproof seal.

　　The pipe plays a protective and waterproof role on the wire harness, and can also play a role in reducing vibration and noise. The pipe material generally has the PVC pipe, the corrugated pipe, the heat shrinkable pipe, the silica gel pipe and so on. Pipe materials are generally used in the wet areas of the car, that is, the working environment is bad places, such as engine bay, chassis, etc. The heat-shrinkable tube is divided into single-wall heat-shrinkable tube and double-wall heat-shrinkable tube. The single-wall heat-shrinkable tube is generally used for insulation protection of grounding terminal or medium-voltage terminal, and the double-wall heat-shrinkable tube is mainly used for insulation and waterproof of contact points of wire harness installed in wet area.

　　Wire harness processing tape can be divided into bucky tape, plastic base tape, flannelette tape, paper tape, etc. Almost every wire harness will use this material. The functions are insulation, protection, waterproof, shock absorption and sound insulation, marking points, wire bundles and so on.