Wiring harness manufacturers tell you what are the design principles of automotive door wiring harnesses?

Automotive electrical devices are connected to power sources, control switches, and protection devices through wires, which are the basic components that make up an automotive electrical circuit, and the wiring harness is wrapped by wires in the same direction. Wrapping multiple wires into a wiring harness can make the circuit uncluttered, easy to install, and protect the wires. The power supply and various electrical components in a car are physically connected through a wiring harness, and automotive wiring harnesses are divided into low-voltage and high-voltage wiring harnesses, which are distributed throughout the car. The automotive door system is an important set of functional components that require a high level of wiring harness system. The door wiring harness system is also one of the more complex wiring harness systems in an automobile, so special attention should be paid to the arrangement of the wiring harness. Below by the wiring harness manufacturer to tell you what are the design principles of automotive door wiring harness.1.Introduction to the door wiring harness system door is one of the important functional components of the car, the electrical configuration and functional requirements of the door is more and more high, so connecting a variety of electrical components of the wiring harness is more and more complex, has become a frequent link in the contemporary automotive failures, and therefore more and more attention in the design and manufacture of automobiles. Important electrical components, such as switches, buttons, window lifters, horns, door locks, etc. , are integrated in the car door, and the door wiring harness should meet the working connection requirements of these parts. The door wiring harness is distributed on both wet and dry sides of the door, with many branches and fixed points. The effective arrangement of the door wiring harness is an important link to ensure the realization of the function. Typical door harness structure includes branches and connectors of important electrical components.2. Principles of door harness arrangementIn order to ensure the rationality of the design and safety of the door harness, the harness arrangement should follow the following principles.1) Strong operability of the assembly. The wiring harness is fixed with a spring or a buckle to prevent the harness from falling off. When assembling, just press the buckles on the corresponding holes and use as few buckles as possible to fix as many wire harnesses as possible, thus reducing the number of openings on the body.2)Generally, it is necessary to add a fixing point 120mm away from the wire harness connector in order to minimize the burden of vibration and mass of the wire harness on the terminals in the connector.3)In the large tolerance required for the assembly of the wire harnesses, close to the moving parts arrangement There should be sufficient clearance between the harness and the moving parts, which is determined by the amount of movement of the moving parts. Within the large tolerances required for harness assembly, if the harness is not secured to a corresponding part, it should be at least 6 mm away from the stationary part.

4) When wiring the door harness, try to stay away from the heating area and the moving parts area. 5) The location of the wires coming out of the moving parts and connectors of the car should be based on the vibration amplitude of the car parts and the large movement stroke of the moving parts, and enough wire length should be reserved in order to avoid the wiring harness being subjected to tensile force or tension. When arranging the wiring harness branch, the arrangement position should be as wide as possible, the length allowance should be as long as possible, and the wiring harness is generally larger than 25mm when it is loose, in order to prevent abrasion or tensile stress damage to the wiring harness caused by the moving parts in the process of movement.6) In the area of strong electromagnetic interference, pay attention to the wiring harness with antimagnetic protection, and you can also use twisted pairs of wires or shielded wires, and other special conductors.7) The wiring harness should be avoided from the sharp objects, the edges of the metal frames, weld seams and fixed holes on the body, especially at corners. When going around sharp corners or through holes, the wiring harness should be key-protected with rubber and felt pads or protective covers to prevent functional failures due to wiring harness abrasion.8) All connectors should be matched, and good contact should be maintained between the connectors.9) The wiring harness should be laid out on the dry side of the door as much as possible to prevent water leakage from affecting the wiring harness.3. Example of Door Harness LayoutCurrently there are two ways of installing the door harness, one is that the harness is directly One is that the wiring harness is directly fixed on the door sheet metal hole; the other is integrated on the door module and installed on the metal plate through the door module. Japanese and Korean cars and independent brands are mostly fixed mode, and European and American cars are mostly fixed mode. In short, the door wiring harness is a guarantee for the normal operation of the electrical components on the door, which is connected to the power supply, switches, buttons, window lifters, speakers, door locks and other important components. The layout of the door wiring harness is directly related to the realization of the function of the harness and the safety of the electrical components. Therefore, when arranging the wiring harness, it is necessary to consider the fixing method, wiring harness direction, waterproof measures, anti-magnetic measures, anti-loss measures, connector selection and matching, etc., so as to achieve the optimization of wiring harness design and layout.

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