A-Important pieces. Refers to the operation of the car, the essential function of the car’s operation safety.
Including engine control unit (PCM), brake anti-lock braking system control unit (ABS), airbag system control unit (SAS) and other control units related to vehicle safety. This type of electrical load is not only crucial to the performance and safety of the vehicle, but also this type of electrical equipment is sensitive equipment and is easily interfered by other electrical equipment. Therefore, a single fuse must be installed for this type of electrical equipment.
B- General important items. Important functions, but do not affect the operation of the car, and do not affect the safety of the car.
Including various sensors of the engine, various alarm lights and external lights, front windshield cleaning device, horn and so on. This type of electric load is also crucial to the performance and safety of the vehicle, but this type of electric load is not sensitive to mutual interference. Therefore, this type of electric load can be combined with each other according to the situation, and a fuse can be used in common.
C-Common piece. Other functions that bring convenience to car use
Including car audio system, electric heated seats, glove box lighting, electric rearview mirror, electric window lift system and so on. This kind of electric load is not very important to the whole vehicle. Generally, electrical equipment is added to improve the comfort of drivers and passengers. Therefore, for this type of electric load, they can be combined with each other according to the situation, and a fuse can be used in common.