Front bumper. In rainy days and wading, the front bumper area directly faces the strong impact of water, so special attention should be paid to the watertightness of electrical equipment located in this area. For example, the electric horn must be located above the wading line to prevent distortion of the water inlet horn. The wiring harness behind the front grille and in front of the radiator should be able to withstand the impact of strong water jets. Equipment located below the wading line, such as front radar, front fog lamps, etc., also need to meet the requirements for water resistance. The wiring harness of the lamp is located behind the lamp, although it will not be directly impacted by water, but the lamp is a component that changes in high and low temperature. The inside of the connector directly installed on the lamp will also form a negative pressure when the lamp is cooled, so be sure to choose a high water tightness connector, or take better waterproof measures, such as adding reinforcing ribs on the waterproof plug to improve the performance. Waterproof pressure rating.