How do I identify a blown fuse in my car?

For completely safe operation of all electrical systems in the car, special fuses are used, which protect against overloads and short circuits. These are the simplest inexpensive protective elements, which allow you to eliminate the damage of expensive units, which significantly reduces the car owner’s expenses for car repairs. Let’s talk in more detail about how to identify a blown fuse in your car. If, in addition to the fuse, there are many other parts in the car that don’t work, then give it away for recycling. They give a lot of money for old cars here: https://scrapcar.cash.

How fuses work

The principle of operation of fuses is extremely simple, because of an overload or short circuit in the network can melt the braided wires, often fail various modules and units, and in extreme cases, the car can catch fire. It is to prevent such mishaps that fuses are used to take the full hit. In the event of an overload or short circuit, such protection simply blows, thereby de-energizing a particular electrical circuit.

That is, in fact, when there are problems in the wiring, overloads and shorts, not electrical units and modules are damaged, but only fuses burn out, which subsequently will have to be replaced. Modern cars may have dozens, if not even hundreds of fuses in a block with such relays, each of which is responsible for the power supply and protection of certain electrical units. In some cases, finding damaged relays may present some difficulty, since you need to identify the failed electronic module and understand which fuse is responsible for their operation.

Ways to check

Find all the necessary information on the fuse diagram can be found in the manual to the car, also many manufacturers for easier orientation in such relays put the scheme directly on the inside of the cover, which covers the block with electrical protection. With such a qualitatively made correct scheme, finding the right fuse, which is responsible for the work of this or that block, system, headlight or other electrical devices in the car, will not make any difficulty.

In order to simplify the identification of problems with fuses, their body is made of transparent plastic. This allows visual inspection to easily identify the blown inner core, which indicates the need to replace such inserts. Specialists recommend replacing the fuses already at the first doubts about the functionality of the fuses, which will ensure the correct operation of the entire electrical system in the car. However, in certain cases, damaged fuses have a whole strand, so it will be difficult to determine their malfunction by visual inspection alone.

With maximum accuracy, you can determine the functionality of the fuse by “probing” it, for which an ordinary multimeter is used. Such devices have a special sound mode, and all you have to do is to close two pins of such a fuse with a tester, after which a characteristic squeak should appear. If there is no sound, then the electric current does not pass through the fuse, and it needs to be replaced.

Replacing a fuse

Such safety fuses have their own power parameters, accordingly, it is necessary to correctly choose fuses that will fully meet the characteristics of the blown elements to be replaced. You can buy them in most auto and radio stores, the cost of such fuses is not too high, and it will not be superfluous for the driver to carry several protective relays in the car, which differ in their power parameters.

To sum up

To ensure the fully safe operation of electrical devices, cars are equipped with a block with numerous relay fuses, which take the full impact of overloads and short circuits, after which the circuit is broken, and instantly de-energize those or other electrical systems and modules in the car. To identify such a blown fuse, it is necessary to inspect the relay for damage to the inner core or use a special tester, which is used to “test” all the fuses responsible for the operation of the control units in the car.

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