Talk about car wiring harness

2022-05-07

What is an automobile wiring harness?


In the modern automobile, there are many wiring harnesses, and electronic control system has a close relationship with wiring harnesses.

 


        Someone once made an example: if the function of microcomputer, sensor and executive element is compared with the human body, it can be said that microcomputer is equivalent to the human brain, sensor is equivalent to the sensory organ, executive element is equivalent to the motor organ, then the wiring harness is nerve and blood vessel.


                                     



       A wire harness is a component that forms a connecting circuit after crimping the contact terminals (connectors) made of copper and wires and cables, and then binding them with plasticized insulators or metal shells. Wire harness industry chain includes wire and cable, connector, processing equipment, wire harness manufacturing and downstream application industry. Wire harness is widely used in automobiles, household appliances, computer and communication equipment, all kinds of electronic instruments and meters, etc. The body wire harness connects the whole body, and the general shape is H-shaped.

     Can you imagine: now the total length of family car wiring harness is about 3 kilometers?

                            

Because of the particularity of automobile industry, the manufacturing process of automobile wire harness is more special than other ordinary wire harness.
There are two general systems for manufacturing automotive wiring harnesses:
1. By European and American countries, including China:
Use TS16949 system to control the manufacturing process.
2. Mainly in Japan:
Toyota, Honda, they have their own systems to control the manufacturing process.
With the increase of automobile functions, the widespread application of electronic control technology, more and more electrical parts, wires will be more and more, wire harness will become thicker and heavier. Therefore, advanced vehicles have introduced CAN bus configuration, using multiplexing system. Compared with the traditional wiring harness, the multi-way transmission device greatly reduces the number of wires and connectors, making wiring easier.


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