Introduction to the components of automotive wiring harnesses

Automobile wiring harness is the main network of automobile circuits. It plays an important role and is indispensable to connect the electrical and electronic components of automobiles and make them function. Without automobile wiring harness, there would be no so-called automobile circuit. At present, whether it is a high-end luxury car or an economical ordinary car, the composition of wiring harness is basically the same, which is composed of wires, insulating bandaging materials and connectors. Below, Huichengyuan Electronics gives a brief introduction to the main components of these automotive wiring harnesses. Automobile wires Automobile wires, also known as low-voltage wires, are different from ordinary household wires. Ordinary household wires are copper single-core wires with a certain hardness. Automobile wires are copper multi-core flexible wires, some of which are as thin as hair, and several or even dozens of flexible copper wires are wrapped in plastic insulated pipes (polyvinyl chloride), which are soft and not easy to break. The commonly used specifications of wires in automotive wiring harnesses include wires with cross-sectional areas of 0.5, 0.75, 1, 1.5, 2, 2.5, 4, 6 square millimeters, etc. Each of them has an allowable load current value and is equipped with wires of electrical equipment with different power. Taking the vehicle wiring harness as an example, the 0.5 gauge wire is suitable for instrument lights, indicator lights, door lights, ceiling lights, etc.; The 0.75 specification line is suitable for instrument lights, indicator lights, door lights, ceiling lights, etc.; The 1.0 specification line is suitable for license plate lights, front and rear small lights, brake lights, etc.; Spec lines are suitable for turn signals, fog lights, etc.; The 1.5 specification line is suitable for headlights, horns, etc.; Main power lines (such as generator armature lines, ground lines, etc.) require 2.5 to 4 square millimeters of wire. For example, the ground wire and positive power wire of the battery are special automobile wires. When used alone, their wire diameter is relatively large, at least 10 square millimeters, so these "Big Mac" wires will not be woven into the main harness.

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In order to facilitate identification and maintenance, the low-voltage wires in the wiring harness are usually composed of different colors, which are divided into single-color wires and two-color wires. The purpose of the colors is also stipulated, which is generally a standard customized by the car manufacturer. China's industry standards only stipulate the main color. For example, it is stipulated that single black is used for ground wires, and single red is used for power cords, which should not be confused. Insulating wrapping material wire harness is made of wrapping low-voltage wires with cotton yarn woven sleeves or PVC tape. For the sake of safety, convenience of processing and maintenance, woven wire wrapping has been eliminated, and now it is wrapped with adhesive plastic tape, which is not messy, easy to install, and can protect the insulation layer of low-voltage conductors. A car can have multiple wiring harnesses. Connector connections between wire harnesses and electrical components, use connectors or lugs (solder lug connectors). The coupling plug is made of plastic and is divided into a plug and a socket. The common ones are: wire plug-in, wire plug-in, large wire plug-in, large wire plug-in, etc. The wire harness is connected with the wire harness by a coupling plug, and the connection between the wire harness and the electrical component is by a coupling plug or a wire lug. Electrical wires, insulating wrapping materials and connectors are three major components of the wiring harness, which directly affect the quality of the wiring harness and can also reflect the technical content and reliability of the wiring harness. Because of this, Huichengyuan Electronics attaches great importance to the manufacturing of these three components and the selection of related materials, and strives to be meticulous and comprehensive. Therefore, the quality of our wiring harness products has always been unanimously recognized by our customers.

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