Modernization of the VAZ generator voltage regulator. Types of relay-regulator. General practical information about the voltage generator in a car

Everyone knows that the performance of standard generators in Russian cars does not suit everyone, which is why they discuss on numerous forums which generator for VAZ 2110 to choose. Of course, a simple solution would be replacing the generator with a reinforced one, but we are not looking for simple ways. In this article another Do-it-yourself modification of the VAZ generator.

The car is moving in a traffic jam in the summer, the radiator fan is running, the low beam is on, and if you add air conditioning to this, then the voltage of the car's network drops noticeably. And all because the generator does not have enough power and therefore the battery is connected to the case. To solve the problem, it is proposed to install a voltage regulator (VR) from a foreign car with suitable characteristics on the original brush assembly, which will allow the generator to supply more than 14V under load.

List of RNs from foreign cars that fit the brush assembly of the generator 9402.3701 (thanks to Dranik from the autolada.ru forum):

HUCO-130512
Febi-17202
Bosch-1197311028
Hella-5DR 004 242-061
Beru-0 190 005 004

The modification process begins with the removal of the relay regulator. Required:

Standard voltage regulator (160r.)
Voltage regulator from a foreign car for 14.5V.

The box contains the catalog code for the spare part. Price 420 rubles, a cheaper brand will cost 220 rubles. In general, any company will do, the main thing is that the shape is identical to ours.
We separate the tablet from the standard voltage regulator; this is done simply and does not require demonstrations. As a result, we just get a bare body with brushes.
We separate the 14.5V tablet from the LV of the foreign car. Be careful not to damage the tablet. Now we are trying to combine the tablet of a foreign car and our body with brushes.

The photo shows a dismantled tablet with a foreign car's pH and a body with brushes.
Because it is a little larger, it is not that easy to install. This is what a combined foreign-made 14.5V tablet looks like with our PH housing.
And a standard pH and a 14.5V tablet assembled and ready for use.

Next, we solder the leads of the foreign tablet to our PH body. The terminals will have to be slightly bent to fit the outputs of the LV housing.
We place the tablet on the standard PH body and screw the tablet to the body with bolts.

Next, solder the terminals of the tablet. We clamp the lead at the very base to dissipate heat and place the solder so that the lead of the tablet is completely covered with tin. We cover the nuts to prevent self-loosening due to vibration.
We get a standard pH and a tablet from a foreign car at 14.5V. Now all that's left is install a reinforced generator on a car.

As a result, our high power generator showed:

On a warm car, the voltage at the terminals is 14.4V
With an average network load, the voltage was 14.2-14.3V
When all devices were turned on, the generator voltage dropped to 14-14.1V and remained the same when the internal combustion engine warmed up to 90°C.

Another way increase the car network voltage -

Checking the generator voltage regulator may be necessary when problems with the battery begin to occur. In particular, it began to recharge. When such a malfunction occurs, it’s time to check the generator voltage regulator relay.

The relay should turn off at 14.2-14.5V

The task of this simple device is to regulate the voltage of the electric current to the battery. When it fails, the battery is either not charged enough or, on the contrary, overcharged, which is also dangerous, since this significantly reduces the battery life.

Agree that such a prospect is not very good because of one small detail. This is why it is so important to monitor the operating condition of the voltage regulator (it can also be called a pill or a chocolate bar). But in order to properly check the voltage regulator, you need to know its type and several important features.

Types of Voltage Regulators

Having understood what types of these devices there are, what their features and properties are, a complete understanding of the procedures carried out during testing will come. This will also give the answer to what scheme, in what way and how to check the generator voltage regulator. There are two types of regulators:

combined;
separate.

In the first case, it is meant that the regulator housing is combined with the brush assembly directly in the generator housing. In the second case, the regulator is a separate unit, which is located on the car body, in the engine compartment, and wires from the generator go to it, and wires from it go to the battery.

Features of regulators is that their bodies are non-separable. They are usually filled with sealant or special resin. And there is no particular point in repairing them, since the device is inexpensive. Therefore, the main problem in this regard is to check the generator voltage regulator relay. Regardless of the type of regulator, the voltage symptoms will be the same.

Signs of malfunction

So, in case of low voltage, the battery simply will not charge. That is, in the morning you will not be able to start the car, the lights on the dashboard may not even light up, or troubles will arise while driving. For example, dim headlights at night, unstable operation of the electrical system (problems with electrical appliances - wipers, heaters, radio, etc.).

In case of increased voltage, there is a high probability of a decrease in the electrolyte level in the battery banks, or its boiling. A white coating may also appear on the battery case. When overcharging, the battery may behave inappropriately.

Signs, malfunctions and repair of the generator and voltage regulator

In addition, you can also identify the following signs of a faulty voltage regulator (in some cases, some of them may or may not be present, it all depends on the specific situation):

when you turn on the ignition on the dashboard indicator light does not light up(although this may be a sign of other malfunctions, for example, that it has burned out, the contact has fallen out, and so on);
after launch Battery indicator does not go off on the dashboard, that is, there are obvious malfunctions in battery charging;
The brightness of the headlights becomes dependent on engine speed(you can check this somewhere in a deserted place by placing the car opposite a wall and accelerating - if the glow changes, then most likely the voltage regulator is faulty);
car stopped starting normally the first time;
constantly battery is running low;
when the engine speed exceeds 2000 rpm indicators on the dashboard turn off;
the dynamic characteristics of the car decrease, this is especially noticeable at high engine speeds;
in some cases it may boil battery.

Reasons for failure of the relay regulator

The reasons for the failure of the voltage regulator may be:

short circuit in the circuit, including interturn short circuit of the excitation winding;
failure of the rectifier bridge (diode breakdown);
reverse polarity or incorrect connection to the battery terminals;
penetration of moisture into the housing of the regulator and/or generator (for example, when washing a car or driving in heavy rain);
mechanical damage to the unit;
natural wear and tear of the unit, including brushes;
poor quality of the device being directly tested.

There are a number of simple methods for checking the regulator, regardless of whether the unit is removable or not.

The simplest way to check the generator voltage regulator

The simplest method of checking the regulator is to measure the voltage at the battery terminals with a multimeter. However, it is worth immediately making a reservation that the algorithm given below does not give a 100% probability of failure of the regulator. Maybe, . But the advantage of this method is that it is simple and there is no need to dismantle the device from the car. So, the algorithm for checking the generator voltage regulator with a multimeter is as follows:

Set the tester to DC voltage measurement mode at a limit of about 20 V (depending on the specific model, the main thing is that it displays values up to 20 V as accurately as possible).
Start the engine.
Measure the voltage at the battery terminals in idle mode (1000...1500 rpm). If the regulator and generator are working properly, the value should be within 13.2...14 V.
Increase speed to 2000...2500 rpm. In the normal state of the electrical circuit, the corresponding voltage will increase to 13.6...14.2 V.
When the speed increases to 3500 rpm and above, the voltage should not exceed 14.5 V.

If during the test the voltage values are very different from those given, then most likely the machine’s voltage regulator is faulty. Remember that the voltage should not fall below 12V and should not rise above 14.5V.

As mentioned above, the regulator can be separate or combined with a generator. Currently, almost all foreign cars, and most modern domestic cars, have combined relays installed. This is due to the specifics of their work and space saving.

Checking the combined relay-regulator

Checking the VAZ 2110 voltage regulator

To perform the corresponding check, it is necessary to assemble the circuit shown in the figure. To do this, use a charger or power supply with an adjustable load (it is important that with its help it is possible to regulate the voltage value in the circuit), a 12 V light bulb (for example, from a turn signal or headlight, with a power of 3...4 W), a multimeter, directly the voltage regulator (this can be from a Bosch, Valeo or other generator). It is advisable to have the wires used for switching with “crocodiles”.

Checking the voltage regulator of the generator 37.3701: 1 - battery; 2 - ground terminal of the voltage regulator; 3 - voltage regulator; 4 – terminal “Ш” of the regulator; 5 - terminal “B” of the regulator; 6 - control lamp; 7 - terminal “B” of the voltage regulator.

If you assemble a circuit in which the voltage is at a standard value of 12.7 V, then the light bulb will simply glow. But if you use a voltage regulator to raise its value to 14...14.5 V, then if the relay is working, the light should go out. Otherwise the regulator is faulty. That is, when the voltage reaches 14...14.5 V (depending on the model of the machine and, accordingly, the regulator) and above, the light goes out, and when it drops to the same level it lights up again.

It is important that the light does not go out until the voltage supplied to the regulator reaches 14 V. Otherwise, at idle, the generator will not be able to properly recharge the battery.

Checking the VAZ 2107 voltage regulator

Checking the voltage regulator on VAZ 2108/2109 cars

Until 1996, a VAZ 2107 with a 37.3701 generator was equipped with an old-style voltage regulator (17.3702). The verification procedure is given above. After 1996, a more modern generator of the G-222 brand was used (integrated regulator RN Ya112V (V1).

As you can see, the verification algorithm for all regulators is almost the same. The only difference is the cutoff values when the relay is activated.

Checking an Individual Regulator

Checking the voltage regulator of the G-222 generator: 1 - battery; 2 - voltage regulator; 3 - control lamp.

As a rule, separate voltage regulators were installed on old cars, including domestic VAZs. But some manufacturers continue to do this to this day. The verification process is similar. To do this, you need to have a power supply with a voltage regulator, a 12 V light bulb, a multimeter and a directly tested regulator.

To check, you need to assemble the circuit shown in the figure. The process itself is similar to the one above. In normal condition (at a voltage of 12 V), the light bulb lights up. When the voltage value increases to 14.5 V, it goes out, and when it decreases, it lights up again. If during the process the lamp lights up or goes out at other values, it means that the regulator has failed.

Checking relay type 591.3702-01

Relay test diagram type 591.3702-01

You can also still find a voltage regulator of type 591.3702-01, which was installed on rear-wheel drive VAZs (from VAZ 2101 to VAZ 2107), GAZ and Moskvich. The device is mounted separately and installed on the body. In general, the test is similar to that described above, but the differences are in the contacts used.

In particular, it has two main contacts - “67” and “15”. The first of them is a minus, and the second is a plus. Accordingly, to check it is necessary to assemble the circuit shown in the figure. The verification principle remains the same. In normal condition, at a voltage of 12 V, the light bulb lights up, and when the corresponding value increases to 14.5 V, it goes out. When the value returns to its original value, the light comes on again.

A classic regulator of this type is a device of the PP-380 brand, installed on VAZ 2101 and VAZ 2102 cars. We provide reference data regarding this regulator.

Testing a three-level relay

Some car owners install on their cars, instead of standard “chocolate bars,” three-level relays, which are technologically more advanced. Their difference is the presence of three voltage levels at which the battery power is cut off (for example, 13.7 V, 14.2 V and 14.7 V). The appropriate level can be set manually using a special regulator.

Such relays are more reliable and allow flexible adjustment of the cutoff voltage level. As for checking such a regulator, it is completely similar to the procedures described above. Just do not forget about the value that is set on the relay, and accordingly, check it with a multimeter.

Generator check

There is one method by which you can check the performance of a car generator equipped with a regulator relay 591.3702-01 with diagnostic elements. It is as follows:

disconnect the wires that went to pins 67 and 15 of the voltage regulator;
connect a light bulb to it (excluding the regulator from the circuit);
Remove the wire from the positive terminal of the battery.

If, as a result of these actions, the engine does not stall, then we can say that the car’s generator is in order. Otherwise, it is faulty and needs to be checked and replaced.

In order to increase the service life of the voltage regulator, it is necessary to adhere to several simple rules aimed at implementing preventive measures. Among them:

do not allow excessive contamination of the generator, periodically inspect its condition, and, if necessary, dismantle and clean the unit;
check the tension of the alternator belt, tighten it if necessary (either yourself or in a car service);
monitor the condition of the generator windings, in particular, do not allow them to darken;
check the contact on the control wire of the relay-regulator, both its quality and the presence of oxidation on it;
Perform periodic voltage checks on the vehicle battery with the engine running.

Following these simple rules will allow you to increase the resource and service life of both the generator and the vehicle voltage regulator.

Results

Checking the voltage regulator relay is not a difficult task, and almost any car enthusiast with basic repair skills can handle it. The main thing is to have the appropriate tools for this - a multimeter, a power supply with a voltage regulator (although you can connect it to a battery with a charger), a 12 V lamp and pieces of wires for mounting the appropriate circuit.

If during the inspection process you find out that the regulator is faulty, then it must be replaced(repair work is usually not carried out). The main thing is not to make a mistake when choosing it and purchase the part that is suitable specifically for your car.

Despite the fact that the VAZ 2114 runs on gasoline, the electrical component in it is very important. Without maintaining the voltage within the required limits, the lighting will not be able to work, and the battery will be discharged. And most importantly, the ignition system will not be able to function without electricity, which means the engine will not work. Therefore, it is important that the electrical circuit of the machine is maintained in good condition.

Checking the functionality of the voltage regulator is a very important event.

GENERATOR

The generator is designed to generate electricity, which is so necessary for the stable operation of the vehicle's electrical equipment. Additionally, it performs the function of recharging the battery - with a discharged battery it will be impossible to start the engine. For the VAZ 2114 model, the nominal voltage of the electrical circuit is considered to be 12 Volts, but taking into account all consumers (lighting, ignition system, instruments, stove motor, windshield wiper motor, etc.) it should always be higher. Therefore, the voltage in the electrical circuit can range from 13.2 to 14.7 Volts. To maintain it at the required value, a regulator is installed in the generator circuit. Moreover, this device is present in any car, and not just on the 2114 model.

It is important for the car owner to know whether the generator produces the required current. Checking the functionality of the generator is primarily determined by the charging indicator located on the instrument panel inside the car. If the lamp lights up while the engine is running, then the generator circuit is faulty; diagnostics and, if necessary, repairs are required.

VOLTAGE REGULATOR

It is not difficult to find where the VAZ 2114 generator relay is located. This device is located at the back of the generator itself under a plastic cover. Where is the charging relay on the VAZ 2114 - a question for backfilling. The fact is that the charging relay, generator relay and voltage regulator on the VAZ 14th are generally one and the same single device. It is also called a relay regulator.

What happens if the voltage in an electrical circuit drops below 13.2 Volts? The battery will stop charging, and after a fairly short period of time the starter will no longer have enough power to crank the engine to start. What if it is over 14.7 Volts? Then elements of the electrical circuit may fail, for example, the radio or one of the engine sensors (mass air flow sensor, phase sensor, etc.) will burn out.

The charging relay on the VAZ 2114 looks like a large black tablet, at the end of which there are two graphite brushes (brush assembly). If there is little or no charging, the voltage regulator is checked.

DIAGNOSTICS OF RELAY REGULATOR

Checking the functionality of the generator on a VAZ 2114 always begins by measuring the voltage of the on-board circuit with the engine running. The most convenient way to measure is with a digital multimeter:

We set up the multimeter to measure voltage and set the upper limit to 20 Volts;
We connect the probes of the device to the battery and measure the voltage with the engine turned off. The voltmeter should show somewhere between 12.5 and 13 volts;
We start the engine, the readings of the device with a good working generator should increase to about 14 Volts (maybe a little more);
With the engine running, turn on the load (high beam, dimensions, heated rear window, heater motor at maximum speed). We look at the readings of the multimeter - the device should not show less than 13.2 Volts at idle, but it is better if this indicator is in the range of 13.8-13.9.

Checking the generator voltage regulator can also be carried out on a removed device. The device assembled with the brush assembly is checked. For this:

We connect the mass terminal (minus) of the “tablet” with a wire to the minus of the battery.
We supply power (12-14 Volts) to terminals “B” and “C” from the battery.
We connect a 1-3 Watt car lamp to graphite brushes. If the relay-regulator is working properly, the lamp should light up.

There is another way to check the operation of the voltage regulator - when you need to check what the regulator's response threshold is at the upper limit. To do this, we increase the voltage in the circuit, for example, in parallel we add two or three 1.5 V AA batteries to the circuit. We need to increase the voltage to more than 16 volts, we connect everything else according to the same circuit. In this case, if the charging relay is working properly, the lamp should no longer light up.

Summarizing the results of both checks, we draw the following conclusions:

If the lamp lights up during the first check, but does not light up during the second, then the voltage regulator is working;
If the lamp lights up during both tests, the regulator has a breakdown;
If it does not light up in either case, there is a break in the device between the brushes or contacts.

REPLACEMENT

The convenient location of the VAZ 2114 voltage regulator makes it quite easy to change without removing the generator itself.

We proceed as follows:

Disconnect the battery terminals;
We unscrew the nut by 10 with a wrench and move aside the positive wires going to the generator (red and black);
We pull off the chip with a thin wire;
Remove the rear plastic cover of the generator. It is attached to three clamps, and to remove it, the clamps must be bent;
The relay regulator is mounted on two screws. Take a Phillips screwdriver and unscrew the screws;
The “tablet” remains hanging on the wire. Carefully pull out the plug from the device and dismantle the regulator;
We install the new part in the reverse order.

You can replace the relay regulator by removing the generator; here everyone chooses the method that will be most convenient.

OTHER REASONS FOR NO CHARGING

If the battery is not charged or is insufficiently charged, in addition to a faulty voltage regulator, there may be other reasons related to the generator:

The belt is poorly tensioned;
Poor contact or break in the wires supplying power;
Faulty rotor or stator winding;
Poor contact of the brushes with the rotor commutator, the brushes are simply worn out.

A voltage regulator is a device that changes the electrical voltage at the output of an electric motor when it receives a control signal. The VAZ 2114 voltage regulator is built into the electric generator and provides stabilization of the output voltage by changing the excitation current in the generator.

RN is structurally an electromagnetic relay and a series-connected transistor circuit with resistances, which themselves are connected in series to the excitation winding on the generator stator. The physical meaning of the activity of an electronic launch vehicle is as follows.

The generator voltage is unstable and changes abruptly. As it increases, the electric relay turns on additional resistance, which limits the excitation current and the voltage decreases. If, on the contrary, the voltage drops below the permissible value, the relay turns off the resistance and the magnetic flux in the field winding increases, and the generator voltage increases. Since this is all a high-frequency process, the voltage in the automotive electrical network remains within an acceptable stable value.

If we consider the launch vehicle in a practical sense, then this device solves the following problems:

this device activates the electric generator;
it exercises autonomous control over the output of alternating current;
maintains a constant set voltage value, regardless of the amplitude of oscillations generated by the primary windings of the generator.

For the generator model 9402.3701, which is mounted on a VAZ 2114, a voltage regulator 611.3702-14 is installed. This electrical appliance is mounted complete with a brush assembly. Technical characteristics of the launch vehicle:

rated voltage supported by the regulator is 14.5 V;
rated current - 5 A;
maximum weight - 60 g;
size - 66x55x32.

Operation, modifications and replacement of the voltage regulator on the VAZ 2114

Standard voltage regulators for the VAZ 2114 have a feature that is associated with the fact that it is assembled with a brush holder. Despite the fact that these two devices perform different functions, they are assembled into an integral device and if one of them fails, the entire set has to be removed.

A signal for checking and replacing the LV can be a low voltage on the VAZ 2114 on-board network or a drop in the level of illumination by the headlights. This can be determined by observing the capacity of the on-board battery. When the voltage supplied by the generator drops, the battery is poorly charged and the battery capacity drops. If, when monitoring the pH on a cold engine, the voltage is significantly lower than 14.6 V, then the regulator needs to be replaced.

At the same time, if the LV is in good condition, and when checking the brush assembly it is determined that the brushes are worn out or burnt, then the entire assembly will have to be replaced. This must be done if they protrude from the brush holder by less than 5 mm.

Replacing the VAZ 2114 voltage regulator is possible with your own hands. This process is relatively simple, but requires a careful approach.

Attention! The electrical parts of the vehicle must be kept clean. Any contamination leads to a decrease in the performance of the electrical part.

There is open access to where the voltage regulator is located on the VAZ 2114 and nothing interferes with the work. The LV is located under the plastic cover of the generator, which covers the entire contact group of this electrical unit.

Before starting work, you must disconnect the contact wires from the battery.

When working with electrical equipment on a car, the battery must be disconnected to prevent voltage surges or short circuits, which could result in damage to important devices or a fire.

Then you need to find a contact drive with a block that fits onto the output of the generator “D”. This block needs to be disconnected.
Remove the protective rubber cap from the “+” terminal. Using a “13” key, unscrew the nut that secures the external wires to the contact pin and remove them from the pin.
Unscrew the three clips on the sides of the plastic cover and remove it. It is necessary to help with a flat screwdriver to press its edges around the circumference from the area of contact with the generator housing.
The voltage regulator is secured with two screws. You need to unscrew them using a Phillips screwdriver.
Disconnect the connector of wires leading to the LV and pull out the regulator body along with the brushes.
Installation of a new LV is performed in the reverse order. In this case, it is necessary to thoroughly clean all contacts and check the tightness of their fastening, otherwise the performance of this device may be incorrect.

In addition to standard regulators, the use of other devices that support the specified characteristics is allowed. Such devices include a thermally optimized RENATO LV and a three-level voltage regulator.

The RENATO pH regulates charging within a voltage range of 13.6 - 14.7 V, depending on the temperature of the electrolyte in the battery. The temperature sensor is installed on the battery and connected by a wire to the LV. Sold complete with regulator.
The three-level pH is designed to extend the service life of the battery. In addition, it ensures optimal generator voltage under different operating conditions and, accordingly, more efficient operation of lighting equipment and the heating system of the machine.

The design of this device includes a three-position switch with several positions and, accordingly, modes:

in the minimum position, designated as “min”, a voltage of 13.6 V is maintained. This position is designed for working in difficult conditions - at high air temperatures, more than plus 20 degrees, long-term movement “uphill” or in traffic jams;
in the middle position of the switch, designated “norm”, the voltage corresponds to 14.2 V. This mode provides for the generator to operate with a warm engine and an ambient temperature from zero to plus twenty degrees;
when the switch is set to “max”, the pH maintains the voltage within 14.6 - 14.7 V. This mode is required during a cold start, engine operation at low temperatures and at full load from switched on consumers.

A factory-made three-level launch vehicle can be installed without much difficulty. A new brush holder is inserted in place of the old regulator, and the wiring from it is passed through the plastic cover of the generator. The new device is mounted on the engine compartment body in any convenient place and ensures reliable contact to ground. The wire connecting the device itself and the brushes must be insulated from high-voltage wires and the machine body. For more information on how to install a 3-level regulator, we suggest watching the video:

The VAZ 2114 car model began to be produced not so long ago, but it has managed to establish itself in the domestic market. The car took the best characteristics of its VAZ predecessors, but some disadvantages remained. So, very often when the car is moving, it does not have enough electrical power. The problem may lie in the voltage regulator.

Unsustainable breakdown - hurry up with repairs!

It would seem that there is something wrong here - there is not enough tension. The car runs on gasoline, not electricity. However, a lack of current power leads to an increase in fuel consumption, a decrease in engine power, and some electrical appliances stop working altogether and will require replacement in the future. This is especially noticeable in the dark, when many power supply devices are used.

The first sign of lack of voltage is dim high beams - their lamps require a large number of watts. In most cases, it turns out that the battery is poorly charged.

You can deal with this problem easily and quickly by charging it properly. However, sometimes this doesn't help. Look under the hood - the battery terminals may be loose or oxidized. If in a parking lot the current still maintains a constant voltage, then during driving, due to vibration, the terminals may move away, opening the circuit. To fix the problem, you need to thoroughly lubricate the fasteners and tighten the bolts; sometimes only replacing the old terminals with new ones will help.

Generator failure - how to determine?

Then take a tester and check the voltage at the battery terminals. During this time, your partner should keep their foot on the gas pedal and maintain 3000–3500 rpm of the engine. The voltage on the tester in a VAZ 2114 car with a normal working generator should be at least 12–13 Volts. If the voltage is less, it is necessary to proceed with a detailed check of the device. Urgent repairs are also required if the current is greater than 14.7 Volts. This applies not only to the VAZ 2114, but also to other passenger cars.

When checking the operation of the generator, you need to listen to its sound. The presence of a characteristic hum or noise from belt friction indicates wear of its bearing, in which case a complete repair of the device is necessary. Also, quite often the ground contact on the car’s generator turns out to be poor, because the wire is located quite low in the VAZ 2114. During rainy weather, water gets on it, which causes oxidation of the contact terminal.

Another reason for low voltage may be a tight or sufficiently worn alternator belt. As a result, the generator may not turn the required number of revolutions to maintain normal power supply. In this case, it is necessary to tighten it or replace it. The work of tightening or replacing the alternator belt will not take much of your time, and also does not require specific technical skills.

The voltage regulator is the basis of the generator

Then unscrew the fastenings of the voltage regulator and pull it out along with the brushes. Checking the voltage regulator should only be done with brushes. The length of normal working brushes should be at least 4–6 mm. To test the functionality of the voltage regulator at home, we will need a battery, several contact wires and a 12-volt lamp.

The light bulb must be connected to the generator brushes, and the polarity does not matter. Connect the negative contact of the battery to the regulator body, and the positive contact to the power contacts on the regulator. If all elements are properly connected and working, the light should light up. If this does not happen, then the voltage regulator needs to be replaced. There is another way out - give the regulator to an experienced electrician to check, perhaps he will fix the breakdown.

Replacing the voltage regulator in a VAZ 2114 car is a fairly simple procedure. The voltage regulator for the VAZ 2114 can be bought at any auto store, but it will not work with other VAZ models. Car owners have recently replaced the standard regulator with a three-level one. It is better to entrust its installation to an experienced specialist, since it requires minor changes to the generator housing, as well as correct reconnection of the contact terminals to the relay.

The three-level voltage regulator contains an improved relay. It makes the voltage more stable and of higher quality. However, at the VAZ 2114 plant this regulator has not yet begun to be put into mass production for cars. After completing all repair work, reassemble and connect everything in reverse order. It is recommended to charge the battery during repairs.