Three things you should know about car fuse burnt

What is the reason for the burning of the car fuse

What fuse do you want to see, if it is a cigarette lighter insurance, much on-board equipment or portable equipment needs to be used, due to different power consumption,

If the current load exceeds the amperage of the insurance load, the insurance will be cut off. This phenomenon is normal, or the insurance can be increased by 5A.

In this case, it’s no problem to increase the main power line of the vehicle by 5A. The other is that insurance is often burned, such as headlights. Many are not because

The problem of the headlights is caused by too much power generation, so the power generation system needs to be overhauled or the power of the modified bulb is too large, and the other is the circuit system.

The system is short-circuited, and the insurance burns after being plugged in. The other is an intermittent fault, such as a broken power cord at a certain point, but it will not stay next to the car all the time.

It only appears when the vehicle starts or when it is bumpy.

Check the line to see if there is any disconnection, or whether the headlights have just been changed, or the power supply is too large, whether it is newly installed for navigation or other purposes

Electric equipment will cause the fuse to blow out.

The reasons that affect the burning of the car fuse are:

1. When cleaning the engine compartment, because the fuse box is improperly sealed, remember not to flush the fuse box directly with water, which is very easy to cause damage.

The fuse is short-circuited, causing the electrical components of the vehicle to fail, and most of the fuse boxes basically have a significant sign prohibiting water washing;

2. When replacing the headlamp, if the power supply is too large and the fuse is easy to blow, the high current fuse and power cord should be replaced immediately to prevent excessive current and overcurrent.

heat;

3. High-power speakers may also blow the fuse. When installing high-power electrical appliances,-be sure to pay attention to the current and replace the corresponding fuse immediately.

Fuse, most of the better modification shops will basically pay attention to this problem.

How to tell if the fuse is blown

The position of the fuse box of various models is also different: the common one is at the lower-left corner of the steering wheel, and the others are on the negative driving side.

Yes, there are also in the miscellaneous box, the trunk, and the engine compartment. The burned ones are disconnected, and the good ones are connected. -Generally speaking, the fuse is broken

A certain part of the car cannot operate normally, so when a certain part of the car is abnormal, don’t ignore it, check it in time.

Especially the fuse, the hidden danger is big.

How to judge the car fuse is burned:

1. I think the best and easiest way is to use a multimeter to measure. If you don’t have a multimeter, only an electric pen will do. Use needle-nose pliers to clamp the insurance

Wire,-the head touches the live wire, and the other end is measured with an electric pen. If the electric pen is bright, it is normal. If it is not bright, it means it is broken;

2. And it still depends on what kind of fuse you are. If it is an ordinary electric test pen, you will know it, if it is closed, use the electric test pen to test.

Lower end

3. If the two fuses basically have electricity, then the fuse of the neutral line is broken, if there is no electricity, then the fuse of the live line is broken, of course. This.

It is a live test under the condition of 220V electricity, if it is using 380V electricity, it will not work.

What are the faults when the car fuse is burned?

It may be due to the quality of the fuse. Many fuses on the market are of poor quality and made very thin, resulting in excessive contact resistance.

Heat and cause the fuse to burn out.

The crimping point of the fuse is in poor contact, resulting in contact resistance so that the fuse does not reach the rated overcurrent standard value, which will occur when there is a large load

Heat causes frequent burning of insurance.

Most car fuse blows have three conditions:

1. The line or electrical appliances behind the fuse are blown or the electrical appliances behind the fuse are faulty, and the power consumption is increased;

2. The electrical appliances behind the fuse are frequently started, that is, the frequency of starting and stopping during operation is higher than the frequency of normal use of electrical appliances;

3. Especially for motor-type electrical appliances, the starting current is large, and frequent starting may affect the burning of the fuse.

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