Chassis and 4-wheel unsprung area. The environment of the chassis and the 4-wheel area is very harsh, and it is the area with the most frequent and the strongest impact from water. Due to the high-speed rotation of the wheels, the surrounding wiring harness will be strongly impacted by water, and the wiring harness should meet the requirements of preventing high-pressure water jets. Moreover, the wiring harnesses in this area are all below the wading line, so the requirements for short-term water immersion must be met at the same time.
The waterproof design of the whole vehicle is a very complicated and important project. The water tightness of the wiring harness is an important part of the reliability of the electrical system. The wiring harness is a key part of the car, and its basic function is to carry current and signals. The poor waterproof performance directly affects the realization of basic functions. For the wiring harness, its arrangement and installation position are not like the position of other components on the vehicle, which is relatively regular. The arrangement and direction of the wiring harness, the selection of connectors, the process design, and the selection of external protection will all affect the water tightness of the wiring harness. Therefore, the water tightness design of the wiring harness is quite complicated. When designing the wiring harness, the surrounding environment and working conditions should be comprehensively considered, and the optimal waterproof measures should be selected.