The location of the grounding point should be convenient for installation and maintenance, and the bonding surface should be able to meet the torque requirements. No more than 2 lugs should be connected to each ground point. Grounding points should not be arranged in strong splash areas and water accumulation areas. Grounding points are not permitted on bolted metal parts, such as car doors. When setting the grounding point of the instrument panel frame, it is only allowed if it is welded to the vehicle body. For places where the body sheet metal thickness is less than 3mm, a weld nut solution is recommended. For thick boards larger than 3mm, it is recommended to use self-tapping screws for grounding installation. The frame of the instrument panel or the car beam can only be used as a grounding point if it is welded to the body or fastened to the body with weld nuts. Considering the reliability, safety and appearance of the vehicle, it is not recommended to set up grounding points in the following areas: ① bracket; ② near the oil pipe; ③ on the firewall; ④ on the ceiling; ⑤ on the floor; ⑥ other Heavy splash area. 8) Regarding the grounding on the engine. This type of grounding should be avoided and should only be used as return grounding for starters and generators. All engine mounted electrical components should be isolated from the engine block and have their own ground return.