The basic function of the fuse is to fuse when the circuit current is abnormal and exceeds its rated current to protect the circuit. It is worth mentioning that fuses have two important operating parameters: rated current and rated voltage. When using, the corresponding fuse should be selected according to the current and voltage of the circuit. Typically, automotive fuses are of a plug-in design. The fuse is made of an engineering plastic housing, a melt structure made of zinc or copper, a metal melt and a pin connection. Because there are many parts in the car, there are many electronic devices, and almost every device is equipped with a fuse. There is generally a fuse comparison table in the fuse box cover, and you can find the corresponding fuse installation location. Generally speaking, car fuses: There are two main reasons for electrical overload damage; the car circuit is short-circuited. During the use of the car, if any electrical equipment does not work, it may be caused by a blown fuse, which needs to be checked and replaced in time.