The main function of the car fuse is to protect the circuit and electrical equipment. In fact, the car fuse, which is a kind of current fuse, when the vehicle circuit current exceeds the rated current of the fuse and reaches 2 times, the fuse will blow in a few seconds and cut off the current. Play the role of protection, over-current protection of the car circuit.

When the car fuse is burned out, the following phenomena will appear:

1. The vehicle cannot be ignited successfully, and the ignition circuit is out of power. At this time, it is necessary to check whether the ignition coil fuse has been burned, which will eventually cause the ignition coil to have no voltage.

2. The cigarette lighter in the car cannot be used normally. In view of this situation, it is recommended to check whether there is any abnormality in the cigarette lighter insurance in the fuse box in the vehicle.

3. When the vehicle is running, if the speedometer is zero and the abs warning light turns on, but the tachometer is normal, it means that the fuse corresponding to the abs is burnt out.