Why is the battery light on?

Any motorist knows that as soon as the motorIt is started, on the instrument panel immediately light up two light bulbs. One of them shows the oil pressure in the motor, the second is responsible for the battery. The ignition is switched on and the bulbs light up. When the motor starts to work, these bulbs must go out. If, of course, the car is working properly. In this article, we will try to find out what could be the reason that the battery light is on.

It should be noted that the reasons can beseveral, but they all lead to one - the battery of the car does not get a charge. Such a problem can be caused by a number of reasons that we will consider in our article:

Generator belt

The first thing to check if dimlythe battery light is on - whether the generator belt is intact. It is the generator in the car that generates power when the car is on the run. And it is from him that the battery of the car is recharged. The principle of operation is the same as that of any electric motor. The generator shaft is connected to the drive gear and when the motor is running, the belt drive from this gear to the generator axis causes the latter to rotate and generate current. Naturally, if the generator belt is broken, none of this happens and the battery is not charging. It is not difficult to replace the generator belt, almost any motorist can cope with this task. Of course, if there is a second strap in stock and a minimum knowledge of the structure of the running car.

Generator brushes

No less common reason whyThe battery light is a worn generator brush. Special brushes made of graphite on the generator shaft are responsible for the generation of electric current. If they are erased, this leads to the fact that the process stops, the battery, again, does not receive a charge. This is reported by a light bulb on the dashboard. To replace brushes on a shaft of the generator (stator) it is better at experts.

The relay of the regulator

The failure of the regulator relay is another reason why,that the battery light does not go out. This relay provides the supply of the current of the desired voltage. If the relay burns out, then the charge on the battery does not go. If you know how to get to this relay in your car and you have a spare - you can try to replace it yourself.

Shaft of the generator

Breaking the integrity of the stator winding, that is,shaft generator - this is the last reason that the battery light can burn. In order for the generator to generate current, the copper winding of the stator must not have breaks. Otherwise, the generator will not produce electricity. Accordingly, the battery will not be charged either. The problem is solved by replacing the stator, but this operation is definitely better to entrust specialists to your service station.

There are a few simple methods to find out exactly what is wrong with the generator. To do this, you need a voltmeter and a pair of rubber gloves:

1. We start the engine and measure the voltage at the battery terminals. Working should be from 14,2 to 14,7 volts. If lower - the problem is in the generator, which will tell you, and the bulb on the dashboard.
2. We start the engine. We put on rubber gloves. Remove any terminal from the battery. If after that the engine has decayed - the generator does not work.

Also a sign that the generator should be repaired is that all the appliances in the car burn dimly.