Automotive wire, also known as low-voltage wire, it is the ordinary household wiring is not the same. Ordinary household copper wire is single core wire, there is a certain hardness. The car is a copper wire multi-core cord, some cord as thin as a hair, and even several dozens of soft copper wire wrapped in plastic insulating tube (PVC), the soft and not easily broken.
Due to the special nature of the automotive industry, automotive wiring harness manufacturing process is more special than any other ordinary harness.
Manufacture automotive wiring harness systems broadly divided into two categories:
1. United States and Europe division, including China:
Use TS16949 system to control the manufacturing process.
2. Japan-based:
Such as Toyota, Honda, they have their own system to control the manufacturing process.
With the increase of vehicle functions and universal application of electronic control technology, more and more electrical parts, wires will be more and more, it becomes more harness the heavier crude. Therefore, on the introduction of advanced automotive CAN-bus configuration, using multiple transmission systems. Compared with the traditional wiring harness, multiple output devices greatly reduces the number of wires and associated plug-ins, the wiring is more simple.
Common
Common specifications automotive wiring harness wires inside have a nominal cross-sectional area of ??the wire 0.5,0.75,1.0,1.5,2.0,2.5,4.0,6.0 etc. mm (commonly used in Japanese cars nominal cross-sectional area of ??0.5,0.85,1.25,2.0 , 2.5,4.0,6.0 mm, etc.), they each have to allow the load current value, with different power wires for electrical equipment. In the vehicle wiring harness, for example, 0.5 specification line is suitable for instrument lights, lights, door lights, ceiling lights and the like; 0.75 specification line is suitable for the license plate light, before and after the small lights, brake lights and the like; 1.0 specification line is suitable for turn signals, fog lights and the like; 1.5 specification line is suitable for headlights, horns and the like; the main power line such as a generator armature wire, grounding lines, and requires 2.5 to 4 mm2 wire. This refers only to general vehicles, the maximum current value of the key depends on the load, such as a battery of grounding line, the positive power supply line is a dedicated automotive wiring alone, their relatively large diameter, at least a dozen square millimeter above, the "giant" wire will not be programmed in the main wiring harness.
Arrange
In the former arrangement in advance harness Harness draw maps, harness and circuit schematic diagram is not the same. Circuit schematic representation image is the relationship between the various electrical parts, it does not reflect how the electrical connection member between each other, are not affected by the size and shape of each electrical components and the distance between them. The plans must take into account the harness and the distance between them is the size and shape of each electrical components, but also reflects how between the electrical parts are connected to each other.
Harness factory technicians according to the harness cable harness diagram made after the board, the workers in accordance with the provisions of the cable plate to stub row line. Vehicle main harness generally divided into an engine (ignition, fuel injection, power generation, start), instrumentation, lighting, air conditioning, auxiliary appliances and other parts, there is the main branch of the harness and the harness. A vehicle main harness multiple branch wiring harness, the same as if the tree trunk and branches. Vehicle main harness often as a core part of the instrument panel, front and rear extension. Due to the length of the relationship or easy assembly and other reasons, some of the car's wiring harness into the front of the harness (including instrumentation, engine, front light assembly, air conditioners, batteries), rear harness (taillight assembly, license plate lights, trunk lights), roof Harness (doors, dome light, stereo speakers) and the like. Each end will be marked with numbers and letters on the harness flag to indicate wire connection object, the operator can see the sign properly connected to the corresponding wires and electrical equipment, which is particularly useful in the repair or replacement of the wiring harness. Meanwhile, the wire color into monochrome line and color lines, the use of color also provides that the general standard depot custom. China's industry standard only provides the main color, such as requiring a single black line dedicated to the Ground, red color for the power line, not to be confused.
Woven wire harnesses or plastic adhesive tape wrapped, for convenient and safe, processing and maintenance, woven wire wrapping have been eliminated, it is wrapped with adhesive plastic tape. Between the harness and the harness, the connection between the harness and electrical components, using plug-ins or line linking ear. Associated plug made of plastic, divided plugs and sockets. Between the harness and the harness with the associated plug-in phase, the connection between the harness and electrical components associated with the ear plug or wire.
Material
Automotive wiring harness of the material requirements are very strict:
Including its electrical properties, materials sporadic resistance, temperature resistance, etc., than the general requirements to harness high, especially when it comes to safety: If directional control systems, brake harness these important components, requirements are more stringent.