The principle of layout door harness

In order to ensure the rationality of the design and safety of the door harness, the layout of the harness should follow the following principles.

1) Assembly operability is strong. The wire harness is often fixed with snap springs or snaps to prevent the wire harness from falling off. As long as the buckle is pressed into the corresponding hole position during assembly, as few snaps as possible are used to fix as many wire harnesses as possible to reduce the opening in the body.

2) Under normal circumstances, additional fixing points need to be installed at a distance of 120 mm from the harness connector. The purpose is to reduce the burden caused by the vibration and quality of the harnesses that the terminals in the connector are subjected to.

3) Within the maximum tolerance required for wire harness assembly, there must be sufficient clearance between the moving wire and the wire harness placed near the moving element. This gap is determined by the amount of motion of the moving element. Within the maximum tolerances required for the assembly of the harness, if the harness is not fixed to the corresponding component, it must be at least 6 mm apart from the stationary component.

4) Keep the wiring harness of the door away from the heating area and the moving part area.

5) For the position of the moving parts of automobile moving parts and plug connectors, sufficient line length must be kept according to the vibration amplitude of the automobile parts and the maximum motion stroke of the moving parts, so as to avoid the tension or tension of the wire harness. When wiring branches are arranged, the selected arrangement location should be as wide as possible, and the length of remaining length should be as long as possible. In the case of loosening of the wire harness, it is generally larger than 25 mm to prevent the moving parts from causing the wire harness to wear or pull during movement. Stress damage.

6) In areas with strong electromagnetic interference, attention should be paid to adding anti-magnetic protection to the wire harness, and special wires such as twisted pair or shielded wire can also be used.

7) The wiring harness should be avoided from sharp objects, metal frame edges, welding seams, fixed holes on the car body, especially at the corners. Apply rubber, felt-like mats when passing around acute angles or through holes. Or the protection sleeve protects the key points to prevent malfunction due to wear of the harness.

8) Each connector must be matched and good contact between the connectors must be maintained.

9) The wiring harness should be arranged on the dry side of the door as much as possible to prevent the water leakage from affecting the wire harness.