Self-repair and replacement of the fuse box on a VAZ 2107 carburetor and injector

The fuse and relay block of the VAZ 2107 injector is described here. The main place in the article will be occupied by the new fuse and relay block of the VAZ 2107. This fuse and relay block of the VAZ 2107 injector is presented. A diagram of the fuse and relay block of the VAZ 2107 is presented. In addition, the old fuse and relay block of the VAZ 2107 is laid out. For consideration, a detailed pinout of the fuse and relay block is located VAZ 2107. The fuse and relay box chips for the VAZ 2107 are deciphered and placed in the table. The electrical diagram of the fuse and relay block of the VAZ 2107 is presented in color. The installation location of the VAZ 2107 fuse and relay box is presented. At the end of the article, the replacement of the VAZ 2107 fuse and relay box is described

View of the VAZ 2107 fuse and relay box

Old fuse and relay block VAZ 2107:

On cars of the early years of production, an old VAZ 2107 fuse and relay block, model 15.3722, with cylindrical fuses was installed. In these mounting blocks, fuses are arranged in one row. Their numbering starts from left to right.

New fuse and relay block VAZ 2107:

On cars of later years of production, they began to install a new fuse and relay block VAZ 2107 type 40.3722 or 2105-3722010-17, according to the classification of the VAZ plant, with modern flat fuses. On the cover there are symbols indicating the purpose of the relay, fuse numbers and the electrical circuits they protect.

1. connection switch for heating the rear window;
2. switch switch for windshield wipers and headlight washers;
3. signal connection relay (jumper inserted);
4. relay for connecting the cooling system fan (not used since 2000);
5. switch for switching on the main phase lighting;
6. relay for low beam headlights;

And also: F1 - F17 - fuses (see table “Circuits protected by fuses”).

Healthy ! Tightening torques for VAZ 2107

What to consider when choosing a new battery

According to the passport, the battery is designed for 3-5 years of active use (in reality it turns out to be less). Therefore, over time, it becomes necessary to buy and connect a VAZ 2107 battery instead of a failed one.

When purchasing a new battery, you should consider a number of parameters and characteristics. Battery type: serviced and maintenance-free. The first option allows you to check and replenish the electrolyte level. This makes it possible to use the battery longer.

The next question is: what power will the battery on the VAZ 2107 be most efficient. Batteries with a capacity of 50–60 Ah are suitable for this model. However, given that modern cars are equipped with energy-intensive equipment, it is better to opt for more capacious batteries. In addition, carburetor VAZ models require more powerful batteries - they consume more energy when starting. In terms of dimensions, the VAZ 2107 requires power supplies with dimensions of 242*175*190 mm. The vast majority of samples available on the market fit them.

When choosing a battery, you should also take into account the place of residence of the owner of the “Seven”. For those who live in the south, you can purchase a less powerful battery. Northerners are advised to prefer a battery with a higher capacity: in the cold, the car starts with high energy consumption.

VAZ 2107 fuse box and relay description

The vehicle's electrical equipment is protected by fuses installed in the fuse and relay mounting block.

The battery charging circuit, the ignition and engine starting circuits, and the windings of the low and high beam headlight relay are not protected by fuses.

All fuses and auxiliary relays are mounted in a separate fuse block located in the engine compartment. In addition, through the mounting block, the wiring bundles of the engine compartment are connected to the wiring bundle of the instrument panel and to the rear bundle. The conventional numbers of the plugs in the connecting blocks of the mounting block and the colors of the wires connected to them are indicated in the figure in the section “Pinout of the VAZ 2107 fuse box”. The diagram of the internal connections of the mounting block is shown in the figure in the section “Diagram of the fuse and relay block of the VAZ 2107”.

Until 1998, only mounting blocks of type 15.3722 (old style) were used. Since 1998, fuse and relay blocks VAZ 2107 model 40.3722 or 2105-3722010-17 of increased reliability with pin fuses began to be installed on parts of manufactured cars. All these blocks have the same internal connections and are completely interchangeable.

In mounting blocks 40.3722 or 2105-3722010-17, instead of 8 A fuses, 10 A fuses are installed, and instead of 16 A, 20 A fuses are installed.

On some cars produced in the 80s, mounting blocks of fuses and relays of type 15.3722, manufactured in the former SFRY, were installed. They were not collapsible and could not be repaired. If internal connections were damaged, they had to be replaced with new ones.

Fuse and relay blocks of the VAZ 2107 of domestic production can be disassembled and their printed circuit boards can be replaced. It is allowed to solder wires to replace burnt out current-carrying tracks on printed circuit boards, but only if this does not require disconnecting the printed circuit boards.

Mounting blocks of the old and new types are interchangeable assemblies.

Confronting attackers

Due to the fact that the battery is not cheap, the issue of protecting the VAZ 2107 battery from theft is quite acute. It’s not difficult to open the hood of a “classic,” which is why thieves are keeping a close eye on the “Sevens.”

Experts offer several options for preventing theft.

• Secure parking or secure garage.
• installation .
• Installation of the hood lock. Let’s be clear right away: few people take this step. Welding work is required, the appearance deteriorates, and it is quite easy for a professional to pick the lock.
• Take the battery with you. Labor-intensive, inconvenient, but effective. On the other hand, if the car is left for a short time, it is defenseless: they can even remove the battery in a supermarket parking lot.
• Reliable battery fixation. Almost the most popular method. The fasteners are secured with a secret that prevents dismantling and makes theft difficult. In combination with an alarm it is a very effective technique.

But all experts agree that the most reliable protection for the VAZ 2107 battery against theft is comprehensive. A combination of multidirectional measures will give the best results!

Pinout of fuse and relay box VAZ 2107

The figure below shows the pinout of the VAZ 2107 fuse and relay box, the conventional numbering of the plugs in the mounting block blocks and the colors of the wires connected to them. The circles indicate the color markings of the pads. (Orange wire 2.5mm2 and brown wire 4mm2)

CARBURETOR VAZ 2107

• a) view of the block from the inside of the car;
• b) view of the block from below from the engine compartment.

All blocks of the mounting block are the same, therefore, under the blocks of the mounting block there is a colored mark (circle) indicating what color block of the car wire bundles should be connected to this block of the block. The marks on the mounting block have the following colors: black, green, red, blue, yellow, white.

Healthy ! Generator VAZ 2107

Theory “on fingers”: how everything works

On the VAZ 2107, devices can receive power from 2 sources. The first is the battery, the second is the generator. The battery supplies energy when the engine is turned off. It has a certain charge, consumed as needed. The generator produces electricity, but only if the rotor is spinning. That is, with the engine running.

Battery operation diagram: 1. Battery, 2. Negative diode, 3. Additional diode, 4. Generator, 5. Positive diode, 6. Stator winding, 7. Regulator, 8. Rotor winding, 9. Capacitor, 10. Mounting block, 11. Control lamp, 12. Voltmeter, 13. Ignition relay, 14. Lock.

VAZ 2107 fuse box and relay chips

Below in the table I present the chips of the VAZ 2107 fuse and relay block , decoded terminal blocks. They are arranged in numerical order.

Additional items

Under the hood

Additional headlight wiper fuses (2A rating) protect the motor windings. They are located on the supply wires next to the gearmotors.

The starter activation relay 113.3747 or 90.3747-10 is located in the engine compartment on the right mudguard.

In the cabin

The windshield wiper relay (PC-514) is mounted under the panel on the left under the trim.

The ignition relay and the hazard warning and turn signal relays are installed on the front panel behind the instrument panel. The ignition relay (113.3747-10 or 90.3747-10) and the hazard warning and turn signal relays (23.3747 or 231.3747) have a bracket for direct mounting on the body.

The fog lamp fuse is located in the gear shift compartment, not far from the radio.

Complete set of fuse and relay mounting block VAZ 2107 old and new model

Replacing fuses in the mounting block

Replacing a fuse in an imported VAZ 2107 fuse and relay block is carried out in the following sequence:

1. Open the cover of the fuse and relay mounting block. The serial numbers of the pin fuses are indicated on the underside of the cover and on the panel of the unit. There, on the cover, are the symbols of the protected circuits;
2. A blown fuse can be identified through the window located on top of the fuse body;
3. To replace fuses and relays, the fuse mounting block was equipped with special plastic pliers.
   1 fuse replacement pliers;
4. 2 pliers for replacing relays.
5. Removing the blown fuse
6. We take a new fuse and use pliers to insert it in place of the blown one.
7. In the same sequence, we replace the damaged relay, but only with pliers number 2
8. Close the cover of the fuse and relay mounting block

Replacing the fuse in the domestic VAZ 2107 fuse and relay box can be done by hand or with pliers after removing the cover. The new fuse is removed from slot 2.

Before replacing the fuse, it is necessary to find out the cause of its blown and, if necessary, eliminate it.

How the charging system works

The battery in any car, in particular in the VAZ 2107, is only necessary for the functioning of the power supply system while the engine is turned off. But when the engine is running, all electrical equipment runs from the generator. It provides power to the injector - nozzles, fuel pump, electronic control unit. But the main load is the battery. It charges while the engine is running.

And the service life of the battery directly depends on how well the charging occurs. A generator is just one source of electricity. But it may be in working condition, but charging is not going to the battery. There can be a lot of reasons for this behavior; you need to thoroughly study the electrical circuit of the charging circuit of the VAZ 2107 car.

Explanation of fuses

The explanation of fuses and the circuits they protect is summarized in the table below.

Designation in the table: * Since 1988, protected by a separate fuse mounted in the wire near the fog light switch.

Replacing the fuse and relay box VAZ 2107

I present the sequence of replacing the fuse and relay box of the VAZ 2107

1. Open the hood of the car;
2. Remove the air filter;
3. We disconnect the blocks of the wire bundles connected from below to the block. Color marks are applied to the block body that correspond to the color of the mounting blocks of the wire bundles. Therefore, there is no need to mark the disconnected pads.
4. We dismantle the glove compartment in the car interior or the glove compartment box (Depending on the configuration).
5. Next, disconnect the blocks of the wire bundles attached to the block from inside the car
6. Using a 10 mm socket wrench, unscrew the 4 nuts.
7. After this, remove the mounting block
8. Installation of the block is carried out in the reverse order.

How to replace the charging relay?

• Important! First, as always, we turn off the ground, remove the negative wire from the battery terminal, then remove the yellow wire going from the generator to the relay, then use a Phillips screwdriver to unscrew it;
• Then we take it out together with the brushes:
• Now we need to carry out diagnostics. To do this, we test the voltage on the brushes with a voltmeter, and we power the relay itself from the battery, “simulating” the rectified current of the generator. At the same time, we apply (+) to terminal “B”, to the yellow wire, and connect (-) to the other terminal, “ground”. We are familiar with the signs of trouble. If you don’t have a tester, you can take a 1-3 W, 12 V light bulb.
• When installing a new relay, you need to press it firmly during installation, since new, unworn brushes provide more resistance.

If after taking these measures there is no effect, you need to look for the cause in the generator, we’ll talk about this next time. At the same time, remember that if you are removing a generator, then either you have decent knowledge in electrical engineering, or you have someone to give it to. There is no third option, especially if you have an injector.

In conclusion, let me tell you about several other reasons for the lack of charging or imitation, and also give advice:

1. If you have a VAZ 2107 injector, then it is strictly not recommended to reset the battery terminal for various “checks” while the engine is running, and especially to allow strangers near the hood for this purpose. This is very harmful to electronic “brains”.
2. It is advisable for those who like to “light up” to be able to say a firm “no” if you have a VAZ 2107 injector.
3. On the instrument panel, the connectors are not soldered to the board, but riveted. Therefore, in some cars in the cold, while the interior is cold, there is no contact with the charging lamp. It lights up, simulating a lack of current from the generator. After the interior has warmed up, contact is restored and the lamp goes out.
4. The next reason for those who like to go to the car wash in the cold. When water gets into the relay and brush assembly and freezes there, there is no charging. The solution is to heat it with any powerful hairdryer.

If you find that your VAZ 2107 is not charging the battery, measures must be taken immediately. Continued use of the vehicle may result in battery discharge. You will have to either look for a travel companion willing to tow the car, or call a towing service.