Why the acb lamp burns. The battery light on the panel - search for the causes and solutions to this problem

Many car owners Lada Samara noticed that after using the ignition key and diagnostic check of the system indicators, the battery light is on and on. This behavior of hers is indicative of a malfunction of the generator, from which the voltage is too weak, or it has disappeared altogether.

Why does this signal appear

The cause of the failure may be not only the generator itself, but also other modules - for example, the generator circuit - in this and other cases the VAZ 2114 Samara battery light is also on. Among the most common perpetrators of voltage loss, the following circumstances may also be present:

* The f16 fuse has overheated, or its contacts in the mounting block are too oxidized.
* 0-wire cut off. This wire feeds a combination of other devices.
* If the battery on the instrument panel is lit, this could also mean that the switch is worn out from the ignition. In this case, several more LEDs will light up on the panel.
If the cause is still hidden in the generator, the following breakdowns are possible:
Deterioration of generator brushes requiring replacement.
* Contact rings are covered with oxide.
* Replacement of the voltage regulator is required.
* In case the battery on the instrument panel is lit and there is a suspicion of bearing wear, it is necessary to replace it.
* Breakage or slippage of the belt.
Another symptom is manifested at a time when the battery charging lamp VAZ 2114 Samara is dimly lit. This glow is a symptom of a too weak current coming from the generator. To test this hypothesis, it is enough simply to increase the engine's revolutions by clicking on the gas. If the LED finally goes out, it's all true.
This problem can arise due to a number of unrelated reasons: oxidized battery and generator connection elements, brush wear, stretched belt, problems with the diode bridge, etc. Without the involvement of a specialist, the search for a breakdown source can be delayed for a long time, just like definition reasons for the accumulation of a battery at VAZ 21134 Samara.

In the car VAZ 2115, when the engine starts, the bulbs on the instrument panel light up, including the battery lamp. After the engine has wound up, the battery lamp goes out, which means that the onboard equipment is powered not by the battery, but by the generator.

The photo of the instrument panel of the car VAZ 2115. The figures are: 19 - reserve; 18 - the control lamp of pressure of oil; 17 - a control lamp of a lay brake; 16 - the indicator of a charge of the storage battery or a lamp of the accumulator; 15 - indicator of time and temperature; 14 - a control lamp "check up the engine"; 13 - the control lamp of inclusion of the alarm system; 12 - the indicator of run; 11 - the reset button; 10 - a control lamp of a headlight of headlights; 9 - a control lamp of a working brake system; 8 - a control lamp of dimensional light; 7 - a control lamp of a reserve of fuel; 6 - the index of level of fuel; 5 - a speedometer; 4 - a control lamp of the right indexes of turn; 3 - a control lamp of the left indexes of turn; 2 - a tachometre; 1 - the index of temperature of a cooling liquid.

   However, if the lamp does not go out, or goes out completely, then the battery loses its charge. To leave the garage with a burning lamp is highly discouraged, since the generator in this case does not provide charging of the battery. A car with a carburetor engine can work in this mode for about an hour, in the ideal case - when the battery charge is close to 100%. After the current is cut off, the spark plugs of the engine simply can not produce a spark. Let's consider possible reasons why the VAZ 2115 battery lamp is burning.

Despite the fact that formally the VAZ 2115 is equipped with a 12 V battery, in fact, it gives the voltage a little higher (when the charge level is high). And for its charging, it is necessary to supply a current with a voltage even higher, from about 13.2 V. Such an increased voltage is necessary in order for the current to flow into the battery. If the generator produces a voltage of less than 13 V, the lamp on the panel may burn dimly. In this case, consumers in the network will be powered by the generator, but the battery charge level will not change.

If the generator supplies a voltage less than 8 V, or does not supply current at all, the battery switches to the energy source mode, and it will feed all consumers. In this case, the lamp on the panel should be bright. To solve the problem, you must resume the current supply from the generator.

	One of the first steps is checking the generator's contacts.

Usually, when the lamp does not go out, motorists immediately rush to the generator, then simply buying a new one. But, even having put a new generator, the lamp can still burn. Therefore, the inspection should begin with the wires coming from the generator - perhaps somewhere the wire is broken, or there is a bad contact, and a short circuit is also possible. Only after making sure of good contact with the generator can you check the generator itself.

A typical cause of an incorrect voltage supply by the generator is a burnt voltage regulator. The voltage regulator is a small part, it is replaced with a new one, it can not be repaired. Moreover, the regulator is an integral node together with the brush holder, and varies with it together. Worn brushes, in turn, can also be the reason for idling the generator. If the brushes protrude from the brush holder less than 5 mm, they are also subject to replacement.

The cause of battery discharge may also be insufficient tension of the alternator drive belt. The slip pulley does not allow the generator axis to gain working rpm, and the output voltage does not match the working one. Checking the tension is simple: if you press a finger on the sagging part of the belt, it should not bend more than 1-2 cm. The tension is increased by means of an adjusting bolt.

Quite often the generator breaks down its rectifier unit. This unit consists of diodes, and the failure of at least one of them leads to an incorrect operation of the entire unit. The diode is a semiconductor element that transmits current only in one direction. AT electrical circuit  the diode plays the role of a valve, preventing, for example, the reverse supply of current from the battery to the generator winding. In practice, a burnt diode in the rectifier block may be the cause of the undervoltage produced by the generator, or the complete termination of the current supply. A defective diode is detected by a multimeter, and is replaced by an ordinary soldering on exactly the same one. Of course, a complete replacement of the entire unit greatly simplifies the work.

Very often the VAZ 2115 battery lamp also burns because of the soldered terminals of the alternator field winding. After tapping the winding, contact with the contact rings is simply lost. In this case, either the entire rotor changes entirely, or soldering soldering leads (which, in general, is very simple, but requires disassembly of the generator). The lamp will also be brightly lit if an open in the excitation winding or a short circuit has occurred. When the winding is closed, the generator emits an unpleasant rumble, which directly refers to replacing the rotor with a new one. Check the winding and eliminate the clipping or closing is quite difficult, often also financially unjustified.

Generator VAZ 2115 should be checked periodically, because the lamp on the instrument panel may well just burn out. Having set out on a journey with a non-working generator, the motorist will land the battery completely, that is, a deep discharge will occur. The car just stalls in the middle of the road. A battery discharged to zero reduces its service life many times. If the generator works, but supplies a voltage of about 15 V, which is much higher than normal, the battery can boil - for him, this voltage is excessive and wear. It should also be remembered that the boiling battery can explode, setting a fire, because the battery on the VAZ 2115 is a traditional type, lead-acid.

The generator can be checked by an ammeter, or simply by monitoring the on-board computer readings. The light bulb shows only two values ​​- the norm or not the norm, and the actually observed value of the produced voltage is much more informative. The generator itself also needs to be removed for testing once a year, because it inevitably wears out brushes, eventually the bearings fail and so on.

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I am glad to welcome everyone on the site devoted to the cars of domestic production,. Today in the "" section we will talk about the problems associated with the battery (battery). You will find out why the battery light is on, the reasons for this, and how to solve the problem.

Anyone who has at least some idea about that, and has minimal observance, probably noticed that after the key in the ignition switch turns on the instrument panel, various indicators in the form of pictograms and inscriptions light up (battery bulb, indicator "", oil pressure lamp, handbrake and so on ...). Also you might notice that after you turned the key again and the motor wound up, almost all of these lights go out, until the next engine starts or until the "brains" detect a breakdown.

If, after starting the engine, any of the above indicators continue to burn or light up while the engine is running - this is a sign that something is wrong with this node. In our case, if a battery light is on the panel, it is necessary to take measures to identify problems, up to the complete elimination of the malfunction.

Burning Battery Lamp  can indicate problems with battery voltage or complete absence of battery.

So, the reasons for which the battery light is on

The first thing to understand is that the cause is not necessarily related to the generator's malfunction or its poor performance, in fact the reason may be very trivial, easily removable. However, we should not exclude more sad scenarios ...

1. Fuse . In the case of F16 or poor contact (oxidation, burnout, etc.). This fuse is connected to other indicators of the instrument panel, so in case of problems with this fuse, other bulbs will burn.

1. The break of "zero" . A break in the "zero" wire circuit will result in a power failure in the instrument cluster.

1. Battery terminals . Check the condition of the terminals, the quality of the contact, and also whether there is oxidation at the terminals. Because of such "trifles", it is possible that there are problems with charging the battery and, as a result, the corresponding indicator appears on the panel.

1. Egnition lock . The malfunction of the ignition switch, or rather the wear of the ignition switch, often causes a continuous burning of the battery bulb. However, in this case, the battery indicator will also burn not one.

1. Weight . A poor contact of the ground wire can cause the battery light on the panel to light up. Check the status of the contact, if any problems are found, fix them.

Malfunctions of the generator which can become the reason of that on a device the light of the accumulator burns

1. Low belt tension of generator , slippage or critical wear of the alternator belt. , if necessary, replace the generator belt and check the urgency of the problem.

1. Ultimate wear of the generator brushes . , and also щеткодержатели then make sure that the problem has left. Also .

1. Bearing . The defective bearing of the generator leads to an increase in the rotor resistance of the rotor of the generator, which causes "undercharging" or complete jamming of the bearing. The solution is to replace the bearing of the generator.

1. Oxidation of contacts . In the case of oxidation of the contact rings, the charge of the battery will be intermittent, eventually the panel will light up battery light. Flushing of the contact rings is carried out using a washing liquid or WD-40.

1. Voltage regulator . If it is damaged, it must be replaced.

As you can see, there are quite a few reasons, and even banal oxidation of contacts can lead to this problem. However, do not be too careless, as soon as you see that the battery light is on, take immediate action to correct this problem. Otherwise, you risk being left alone with your problem somewhere in the middle of the night forest ...