What Is The Reason For The Damage Of The Car Fuse

1、 Circuit protection device:

The function of fuse is to disconnect the power supply of electrical equipment on the vehicle in case of short circuit or overload, so as to protect other electrical appliances and lines. It is only a protection program to avoid greater loss. It can prevent the damage of vehicles and fire after short circuit, but it can not predict and prevent the occurrence of short circuit.

Relay is also a component of protection circuit. Its function is to control large current with small current. For example, some electrical appliances in the car have high power and large current during operation. If they are directly controlled by switch, the switch volume will be too large and too complex. Therefore, the relay method is adopted. A small power switch is used to control the relay, and then the relay controls high-power electrical appliances.

2、 Precautions for fuse replacement:

1. Replace the fuse of the same specification

If a small current is used, it will break soon. If a large current is used, the fuse is not easy to break in case of short circuit, which is easy to cause a fire. Pay attention to the amperage mark on the top of the fuse during disassembly and assembly. If the fuse is burnt out so that the ampere value cannot be identified, we can also judge by its color. In international standards, it is 2A gray, 3A purple, 4A pink, 5A orange, 7.5A coffee, 10a red, 15A blue, 20A yellow, 25A colorless and transparent, 30A green and 40A dark orange.

2. Take your seat according to the number

There are many fuses in the fuse box. Because many lines of optional equipment are reserved on the vehicle, there are also many empty positions on the fuse box. If the fuse is inserted in the empty position, it will not work at all. You should carefully check the electrical appliances in English on the fuse box before installing it.

3、 Location of fuse box:

The fuse box of general models is next to the engine and in front of the steering wheel. You can see it by opening the cover of the machine.

The fuse boxes of various models are also in different positions: the common ones are in the lower left corner of the steering wheel, others are in the negative driving side, miscellaneous cases, trunk and engine compartment.

The blown fuse is generally invisible to the naked eye and needs to be detected with an electric pen. Generally speaking, if the fuse is broken, some parts of the car cannot operate normally. Therefore, when some parts of the car are abnormal, don't ignore them easily. Check them in time, especially the fuse. There are great hidden dangers.

4、 Those actions will place a huge burden on car circuits

1. Flush the engine compartment directly with water

In order to make the engine cleaner, directly flush the engine compartment with water, which is easy to cause a short circuit in the circuit and cause the fuse of the vehicle to blow.

2. Retrofitting lamps

In recent years, headlights have been upgraded rapidly. Many car owners think their headlights are not bright enough, and many have changed to high-power headlights. If the power of the modified headlamp is too large and the vehicle load is too heavy, it will easily cause damage to the vehicle fuse.

3. Refitting speakers

It is not surprising that the pursuit of sound effects is excessive to refit the sound system. Like headlights, if the power of the modified speaker is too large, it is easy to cause damage to the vehicle fuse.

4. Incorrect use of cigarette lighter

Now many devices use cigarette lighters as power supply, just like chargers. Generally, there is no problem with low-power devices, but pay attention not to use high-power devices to avoid fuse blowing.