Repair of a vaz 2107 do it yourself electrician

Domestic classics are not distinguished by legendary reliability. Sometimes various faults occur in the wiring that interfere with the normal operation of the engine. In this case, for the repair, you will need a color wiring diagram with a description, which allows you to understand all the nuances of the wiring. This article presents a diagram for the VAZ 2017 or 20174 models with a carburetor, produced from 1988 to 2001, on which the 37.3701 generator was installed.

Knowledge of the definitions of the 2107 Lada electrical circuit will help you quickly find the required wire, diagnose it, identify and eliminate the malfunction. Of course, when replacing the cabin filter or changing the oil, such information will not come in handy, but in specialized matters, the decoding of the designations will greatly simplify the repair process.

* On some models, headlight and windshield wipers are installed together.
** Models up to the year 2000.
*** Cars that rolled off the assembly line before 1998.
**** One canopy in the center of the roof (before 2000) or two lamps located in the body pillars after this date.

The electrical circuit for the VAZ 2017 is available in excellent resolution. The dimension of 2500 pixels high and 1243 pixels wide will allow the electrician to easily find all the necessary symbols and easily understand the electrical equipment of the machine. In this case, the weight of the photo will be 650 kb.

In addition, for the repair or tuning of the VAZ, you will need to know the serial numbers of the plugs in the pads. The electrical diagram of the VAZ 21074 gives the following designations:

1. Headlights, windshield and headlight wipers, power valve control unit, windshield wiper relay.
2. Mounting block and three-lever switch.
3. Signal and turn signals.
4. Rear headlights.
5. Alarm switch.

When connecting a generator or interfering with the wiring and ignition system of a VAZ, you should know the location of the fuse box in the car. There are 17 of them in total, of which 2 are reserve.

• rear lamps for reverse gear;
• headlight and glass washer pump motors;
• heated rear window;
• direction indicators, alarm;
• fog lights;
• tachometer, voltmeter, warning lights on the tidy;
• cigarette lighter and clock;
• sound signal;
• interior lighting, brake lamps;
• high beam headlights;
• high beam warning lamp;
• engine compartment lighting and license plate lighting;
• illumination of the glove compartment;
• low beam on the right;
• low beam on the left.

The electrical diagram of a VAZ 2017 car will help in repair and maintenance. You can download a picture in high resolution following the link.

Author of the material: Dumchenkov Mikhail

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The electrical equipment of the VAZ 2107 is not the most reliable part of this car, in this heading we have collected all the answers on the repair of electrical equipment and electrical appliances

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The quality of its work depends on the serviceability of the components and systems of the car. Modern cars are crammed with electronics, so the electrical system requires a lot of attention. The article examines the wiring diagram of a VAZ 2107 car, signs of malfunction, and also discusses the features of carburetor engines and with an injector.

If the car refuses to drive, there are problems with electrical appliances or electrical wiring, this gives rise to troubleshooting by replacing defective elements.

If the car does not start, the first step is to check the flow of fuel to the carburetor or the fuel rail of the injector.

If fuel comes in, then the problem of a car's refusal to drive must be sought in the electrical system using an electrical circuit:

1. For a car with a carburetor, problems can be with the distributor, coil, spark plugs, as well as with electrical wiring. After checking the elements of the electrical circuit for serviceability, you need to replace the non-working components.
2. In a car with an injector, the problem may be due to a failure of the ECM (electronic engine control system). Thanks to it, the signals from the sensors are processed and commands are transmitted for execution to the units (video author - Alexander Skripchenko).

There may be problems due to burnt contacts in the ignition switch. To find faults, you need a diagram of the electrical equipment of a VAZ 2107 car, indicating the elements that are consumers of the contact group.

The operation of the engine with a carburetor has a classic scheme:

1. When the key in the ignition switch is turned to the "Starter" position, the electronic system supplies power to it.
2. The generator starts its work.
3. The generator transmits electrical current to the coil. It serves to obtain high-voltage currents. Low voltage currents are applied to the coil. Passing through the module, they are transformed into high-voltage ones and are transmitted through a high-voltage wire to the distributor.
4. Using high-voltage currents, the distributor drive rotates the crankshaft of the power unit. He, in order of priority, closes the contacts and applies an electric discharge to the candles.

The principle of operation is reflected in the wiring diagram of an engine with a carburetor.

Wiring diagram of the classics - carburetor

The contact system includes the following elements:

• switch;
• coil;
• distributor;
• high voltage wires;
• candles.

Thanks to the distributor, the primary circuit of the ignition module is interrupted, and then the high-voltage current is distributed in the desired sequence to the spark plugs. The coil converts the low voltage current into high voltage current. The spark plugs ignite the fuel mixture in the engine cylinders.

Classic ignition system

If the engine does not start when the ignition key is turned, then the reason may be as follows:

1. An open in the electrical circuit between the generator and the coil. In this case, you need to check all contacts and the integrity of the wiring.
2. Coil defective. It can be checked with a spark: remove the wire from the distributor and touch the metal part. If a spark appears during operation of the power unit, it means that the module is working properly.
3. Break in the electrical circuit between the distributor and the candles. In this case, you need to check inside the distributor cover, the slider located there, the high voltage wiring connecting the distributor cover with the candles.

After identifying and eliminating a malfunction in the carburetor, the engine should start without problems if the rest of the car's components are in good order.

On some VAZ 2107 models that were released after 1987, a contactless ignition system was installed. Although the car was more expensive, it was in demand. The innovation consisted in the fact that an electronic switch was installed between the distributor and the coil.

The non-contact ignition system includes:

• switch;
• ignition switch;
• coil;
• distributor sensor;
• high voltage wires;
• candles.

Contactless ignition system

With the help of the distributor sensor, control signals are transmitted to the switch for the formation of a spark and high-voltage current pulses are distributed among the spark plugs. The function of the switch is to convert the control pulses from the proximity sensor into a pulse current, which is fed to the primary winding of the coil. Thus, it improves spark formation when the engine is running on a lean mixture.

The switch is tested with a spark. If, during the check, the distributor does not receive a high voltage pulse, then the switch is defective and needs to be replaced.

If, after replacing the switch with a new one, the problem remains, then it is necessary to replace the electrical wiring with a VAZ 2107. Most likely, the reason lies in the high resistance of the wires of the wiring, this entails a weak spark formation.

The injection engine has the following differences from the carburetor one:

• an electric pump, which serves to increase the pressure in the fuel system (there is no pressure in an engine with a carburetor, and the pump is mechanical);
• the fuel mixture is formed in the cylinder itself, and in the classic version in the carburetor;
• electric injectors are responsible for injecting fuel into the cylinders;
• the moment when the injection of the mixture is required is determined by the ECM (the mixture enters the carburetor when the intake valve is opened).

Injection engine VAZ 2107

An engine with an injector has a large number of electronic components. The reason for the failure of the motor can be a malfunction of the sensors and wiring.

You can find a malfunction in a car with an injector yourself:

• disconnect the sensor by removing the connector;
• check the resistance of the sensor using a tester;
• compare the results obtained with the nominal data, which can be taken from the table in the instructions supplied with the car.

If a faulty sensor is found, it must be replaced.

Thus, it is clear from the article that knowing the principle of operation of an engine with a VAZ 2107 carburetor, in particular with a contact and contactless ignition system, and an engine with an injector, it is possible to identify the reason for the vehicle's failure to start moving if the reason is in electronics.

Knowing the reason for the refusal and having experience in repair work related to electrical wiring, the driver will be able to fix his car on the road and return it to working condition.

The voltage regulator is responsible for the voltage value of the on-board network. Its function is to keep the voltage within certain limits, preventing it from getting too low or too high. If the voltage constantly exceeds the voltage somewhere around 14.5 volts or is lowered below 12.7 volts, the claims are most likely to this very regulator.

If the voltage is too low, then also check the tension of the alternator belt. Its weak tension causes the alternator pulley to slip and problems with full charging.

-Poor electrical contact

The first step is, again, to check the contacts on the generator, and especially contact No. 30, from which the wires go to the consumers and to the battery (usually this is a terminal with 3 wires). It is useful to check the conductor itself between the generator and the battery. It is also necessary to check the "mass" of the engine - the black thick wire connecting the battery and the engine. It is possible that the problem is in the voltmeter itself or in its wiring, as well as in the "ground" wire of the instrument panel itself.

This is in most cases the norm, since a certain voltage must be supplied to the battery depending on the temperature conditions. If the temperature is low, a higher voltage is applied to the battery. As it heats up, the voltage decreases. The voltage regulator is responsible for this, if it is temperature compensating (most of them are now just like that).

Everything here can be harmless enough. It will be enough to change the lamp on the instrument panel (after checking the old one). If the new lamp does not burn, then it is possible that the lamp simply does not receive power (poor contact, wire breakage, etc.).Do not forget to check the contacts on the generator itself, since there are often cases when the reason was in oxidized contacts (including contact No. 61, to which the test lamp is connected) It is useful for this check to check the voltage with a multimeter at the battery terminals when the engine is not running and running.

This lamp signals that something is wrong with the operation of the generator and, as a result, with the battery charge. Typically, a lamp behaves this way for the following reasons:

- The alternator belt has broken or is loose.

Everything is quite simple here - the generator simply does not rotate with the engine. A visual inspection and checking the tension of the alternator belt is necessary, if it is intact. It should also be clean and not oily, since a “lubricated” belt, for obvious reasons, will not rotate the generator well.

It often happens that he came to the garage in the evening, put the car on, drowned it out, went home happy, returned in the morning, turned the key to the ignition on position and turned it on. nothing! Silence, control devices and lamps do not light up, the car, when the starter is turned on, oil the engine idle and will not start.

A fairly common problem - the turn signals work fine, the relay clicks, but the dashboard is dark and the working turn signals can only be “heard” by the click of the relay. So, there are actually only two main reasons - the first, and the most common - the lamp in the dashboard just burned out, or the contacts moved away or oxidized, you need to remove the tidy and check the light bulb / contacts. And the second reason, less common, but nevertheless entitled to life, is the failure of the relay itself.

Domestic classics are not distinguished by legendary reliability. Sometimes various faults occur in the wiring that interfere with the normal operation of the engine. In this case, for repairs, you will need a color wiring diagram with a description, which allows you to understand all the nuances of the wiring. This article presents a diagram for the VAZ 2017 or 20174 models with a carburetor, produced from 1988 to 2001, on which the 37.3701 generator was installed.

Knowledge of the definitions of the 2107 Lada electrical circuit will help you quickly find the required wire, diagnose it, identify and eliminate the malfunction. Of course, when replacing the cabin filter or changing the oil, such information will not come in handy, but in specialized matters, the decoding of the designations will greatly simplify the repair process.

* On some models, headlight and windshield wipers are installed together.
** Models up to the year 2000.
*** Cars that rolled off the assembly line before 1998.
**** One canopy in the center of the roof (before 2000) or two lamps located in the pillars of the body after this date.

The electrical diagram for the VAZ 2017 is available in excellent resolution. The dimension of 2500 pixels high and 1243 pixels wide will allow the electrician to easily find all the necessary symbols and easily understand the electrical equipment of the machine. In this case, the weight of the photo will be 650 kb.

In addition, for the repair or tuning of the VAZ, you will need to know the serial numbers of the plugs in the pads. The electrical diagram of the VAZ 21074 gives the following designations:

1. Headlights, windshield and headlight wipers, power valve control unit, windshield wiper relay.
2. Mounting block and three-lever switch.
3. Signal and turn signals.
4. Rear headlights.
5. Alarm switch.

When connecting a generator or interfering with the wiring and ignition system of a VAZ, you should know the location of the fuse box in the car. There are 17 of them in total, of which 2 are reserve.

• rear lamps for reverse gear;
• headlight and glass washer pump motors;
• heated rear window;
• direction indicators, alarm;
• fog lights;
• tachometer, voltmeter, warning lamps on the tidy;
• cigarette lighter and clock;
• sound signal;
• interior lighting, brake lamps;
• high beam headlights;
• high beam warning lamp;
• engine compartment lighting and license plate lighting;
• illumination of the glove compartment;
• low beam on the right;
• low beam on the left.

The electrical diagram of a VAZ 2017 car will help in repair and maintenance. You can download a picture in high resolution following the link.