Car headlight usb wiring harness connector, car wiring harness arrangement
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 wire harness industry chain includes wire and cable, connectors, processing equipment, wire harness manufacturing and downstream application industries. Wire harnesses are widely used and can be used in automobiles, household appliances, computers and communication equipment, various electronic instruments and meters. The car body wiring harness connects the whole car body, and the general shape is H-shaped.

Car headlight usb wiring harness connector: commonly used
Common specifications for wires in automotive wiring harnesses have nominal cross-sectional areas: 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 4.0, 6.0, etc. square millimeters. (Nominal cross-sectional areas commonly used in Japanese cars are: 0.5, 0.85, 1.25, 2.0, 2.5, 4.0, 6.0 square millimeters, etc.). Each of them has an allowable load current value and is equipped with wires for different power consumption equipment. Take the complete vehicle wiring harness as an example. The 0.5 specification line is suitable for instrument lights, indicator lights, door lights, dome lights, etc.; The 0.75 specification line is suitable for license plate lights, front and rear small lights, brake lights, etc.; 1.0 Specification line is suitable for turn signals, fog lamps, etc.; 1.5 The specification line is suitable for headlights, speakers, etc.; Main power lines such as generator armature wires, grounding wires, etc. require 2.5 to 4 square millimeters of wires. This just refers to the general car, the key is to look at the maximum current value of the load. For example, the ground wire of the battery and the positive power wire are dedicated automotive wires for separate use. Their wire diameters are relatively large, at least more than ten square millimeters. These "big Mac" wires will not be woven into the main wiring harness.


Car headlight usb wiring harness connector: Arrangement
Before arranging the wiring harness, draw the wiring harness diagram in advance. The wiring harness diagram is different from the circuit schematic diagram. A schematic circuit diagram is an image that expresses the relationship between 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 each electrical component 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 vehicle is generally divided into engine (ignition, electronic injection, power generation, starting), instrumentation, lighting, air conditioning, auxiliary electrical appliances and other parts. 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 harnesses (including instrumentation, engine, headlight assembly, air conditioner, and battery). Rear wiring harness (tail light assembly, license plate light, luggage compartment light), roof wiring harness (door, ceiling light, audio speaker), etc.

Each end of the wire harness will be marked with a number and a letter to indicate the connection object of the wire. The operator can see that the signs can be correctly connected to the corresponding wires and electrical devices, which is particularly useful when repairing or replacing the wiring 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 color. For example, it is stipulated that the single black color is exclusively used for grounding wires, and the 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 there are plugs and sockets. 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.