Find out the car fuse together

What is a car fuse?

　　 Fuse is what we are used to calling it, and its official name is "fuse". The purpose of automobile fuses is similar to that of home fuses. When the circuit current is abnormal and exceeds its rated current, the fuse will fuse and act as a circuit protection barrier. Automotive fuses are roughly divided into two types of fast-acting fuses and slow-acting fuses.

Commonly used fuses for automobiles include high-current fuses and low- and medium-current fuses. Generally, the easy-to-reach fuse is the low-to-medium current fuse. Low and medium current insurance can be roughly divided into chip fuses (including automatic fuse box mini fuses), plug-in fuses, screw-in fuses, tube-type fuse box flat fuses. Among them, the medium-sized ATO or small-sized fast-acting chip fuses are available to us. Chip fuse can carry small current, short-time pulse current, such as headlight circuit, rear glass defrosting, etc.

The international standard of automobile chip fuse color: 2A gray, 3A purple, 4A pink, 5A orange, 7.5A brown, 10A red, 15A blue, 20A yellow, 25A transparent, and colorless, 30A green, and 40A dark orange. According to the different colors, the size of different amperages can be clearly distinguished.

The conductor in the chip fuse is made of a metal similar to solder, which has a lower melting point than the ordinary wire itself. The size of the conductor must be calibrated very accurately so that when the rated current is reached, enough heat can be generated to fuse the conductor and break the circuit. The fuse has two important operating parameters, one is the operating voltage, the other is the rated current, the owner should choose according to the voltage and current in the circuit when buying or replacing it.

Location of car fuse box

Generally, there are two fuse boxes in a car. One is responsible for the safety of the external electrical appliances of the car, such as the safety protection of ECU, glass water, car lights, horns, ABS, and other circuits, located in the engine compartment; and the other is responsible for the electrical appliances in the car. Normal work, such as cigarette lighter, window lifter, power seat, and airbag, etc., are generally located on the left side of the steering wheel. For example, before I connected the ACC power cord, I needed to disassemble and install the fuse box in the car.

 Understand the car fuse box

　　 Although there are signs on the fuse box that indicate the position of the functional fuse, the dotted signs and fuses will discourage many car owners who want to DIY. Before doing it, you must understand the function of each fuse.

It is not necessary to take out the fuse directly by hand. Each fuse box is equipped with tweezers to remove the fuse. Both ends of the tweezers can be used to remove large and small fuses.

Do it yourself to replace car fuses

　　 1. Find the location of the fuse according to different car models. Generally, the fuse box is close to the battery. The fuse box is generally fixed by a buckle, and some high-end models also have bolts to tighten. You need to carefully remove the box to open the fuse.

2. Check the legend carefully to find the fuse. Before removing the fuse, you need to read carefully against the legend. Generally, it is easier to match the legend on the side where the fuse is easy to take out.

　3. Use tweezers to unplug the fuse and replace it with a new one. The fuse box is generally equipped with a spare fuse, and it is far away from other fuses for easy identification. Use tweezers to take out the fuse and observe whether it is blown. If it is blown, replace it with a suitable spare fuse.

Precautions and summary of automotive fuses

● Tips for replacing automobile fuses and precautions for use

　　 If there is no spare fuse, use other idle fuses to top it. For example, the fuse of the car window is broken, and there is no spare fuse. At this time, you can use idle insurance such as audio and air conditioning, provided that the amperage of the two is the same or smaller than the original fuse.

Install high-power car lights. After changing the headlight, if the power is too large, it is easy to blow the fuse. The high-current fuse and power cord should be replaced in time. To prevent overheating due to excessive current.

Modified high-power audio. High-power speakers will also blow the fuse. When installing high-power electrical appliances, you must pay attention to the current of the electrical appliances and replace the corresponding fuses in time. Generally better modification shops will pay attention to this problem.

Flush the engine compartment with water. When cleaning the engine compartment, because the fuse box is not properly sealed, remember not to directly wash the fuse box with water, which will cause the fuse to short circuit and cause the electrical components of the vehicle to fail. And most fuse boxes have obvious icons prohibiting water washing. If the fuse box is dirty, wipe it gently with a damp towel.

The cigarette lighter uses high-power electrical appliances. The cigarette lighter fuse is extremely easy to blow. Generally, the cigarette lighter uses a 15-25A fuse. Since the vehicle voltage is 12V, it is recommended that the electrical appliances connected to the cigarette lighter should not exceed 300W, and some small cars should not exceed 200W. As for high-power electrical appliances such as onboard refrigerators and onboard air pumps, it is better to use the fewer cigarette lighter for electricity.

 to sum up

In the past, the driver masters not only had good driving skills but also had first-class car repair skills, because the old vehicles were prone to problems (see now North Korea). At present, the degree of electrification of automobiles is high, and the oil circuit of the entire vehicle can be controlled through small fuses and computer chips. Many problems can be solved by replacing the fuse, and replacing the fuse is not a very difficult task, even simpler than replacing the spare tire. Understanding the fuse can greatly reduce unnecessary trouble and waste of money. Therefore, all car owners should understand the fuse of their vehicle and will replace it.

After reading the above, you should understand car fuses. For more related articles, we will continue to organize and publish them on the blog of the website. Interested users should remember to pay attention to our latest developments.