Where is the fog light relay on the VAZ-2114: location

To ensure maintenance and repair of the electrical equipment of a VAZ car, a special approach was taken to the layout of each of the components of the overall system. That is, all relays and fuses were placed in one compact housing of the mounting block. The use of switching interconnected circuits of various electrical equipment systems makes it possible to avoid installing a large number of relays throughout the machine body and simplifies the process of repairing parts to replace them. To find faulty elements, you do not need to disassemble the entire car - you just need to replace the device itself, which is connected to the circuit using standardized connectors. Diagnostic connectors help us with this. Below are the electrical circuit diagrams of the MB for a VAZ car.

Pinout of mounting block 2107

Circuits protected by fuses

Mounting block diagram 2105-3722010-02

LADA 21054, 21074

Circuits protected by fuses

What is the purpose of MB?

The electrical circuit of modern cars is quite complex even for experienced auto mechanics. Therefore, in order to ensure its maintenance and repair, a special approach was applied to the layout of each of the components of the overall system. To put it simply, almost all relays and fuses are placed in one compact housing of the mounting block - it is impossible to imagine a modern car without it.

This part is the central module of the car’s electrical equipment, which combines the control and protection of all electrical devices. The use of switching interconnected circuits of various electrical equipment systems makes it possible to avoid installing a large number of relays throughout the machine body and simplifies the process of repairing parts to replace them. There is no need to disassemble the entire car to find faulty elements. If the breakdown is serious, there is no need to arm yourself with a soldering iron. It is enough just to replace the device itself, which is connected to the circuit using standardized connectors.

The mounting block can be called one of the most important devices in the electrical system of a car. Almost the entire electrical circuit of the car converges in the body of the part. If a malfunction is detected, checking the electrical circuits must begin with the unit.

Pinout of mounting block 2108

Here is a new type mounting block. The old-style block generally has the same circuit, but some contacts (less than 5%) may not match.

Schematic electrical diagram of the LADA Samara mounting block (VAZ-21099 with VAZ-2114 panel).

Numbering of terminals in connecting blocks, color of wires and electrical circuits connected to them.

Useful: VAZ tachometer connection diagram

Where is the PTF relay located?

On VAZ 2114 cars there are no front fog lights by default. Installation of PTF is an additional option. On older versions, the fog light relay is installed in the engine compartment. For easy access to it, it is necessary to remove the battery. On modern models, the fog light relay is installed in the passenger compartment. It is located on the driver's side under the steering column.

Pinout of mounting block 2109

The VAZ 2109 mounting block is designed to combine wiring harnesses, as well as to accommodate relays and fuses. The first models used a mounting block type 17.3722. It consists of a housing consisting of two parts and a printed circuit board on which leads are soldered for connection to the wiring harness blocks, installation of relays and fuses.

On cars with an injection engine, mounting blocks similar to 2114-3722010-60 are used, but they have a different connection for the radiator cooling fan.

Replacing fuses on a VAZ 2114

When any problems are detected in the operation of the car’s electrical network and engine, be it the burnout of light bulbs or the failure of some electrical devices, the driver must first check the functionality of the fuses. The procedure is as follows:

• determine where the fuses are located on the VAZ 2114, which may have failed. To do this, look in the machine’s operating manual for a diagram of the location of the protective devices and determine whether they are located in the mounting block or under the dashboard in the area where the front passenger’s feet are located;
• when working with the car's electrical system, the negative contact of the battery must be disconnected;
• open the plastic latches holding the mounting block cover;
• remove the plastic tweezers from the mount in the upper right part of the block; they can be red, transparent or yellow;
• take the protective device, the circuit of which is supposed to be broken, by the body with tweezers and pull out the fuse;

• There are rules, developed by operating experience, on how to check the fuse. First of all, it is necessary to visually determine whether the fuse-link inside the case has burned out or whether the charger is in good condition;

• if the destruction of the insert cannot be visually determined, it is necessary to check the protective device using a device;
• If confirmation is received that the fuse has blown, it must be replaced with a functional one. The price for a VAZ 2114 fuse box on the automotive market is about 2,000 rubles, and a set of separate chargers of this type will cost 150 -250 rubles.

Attention!

It is strictly forbidden to install home-made devices or jumpers in place of failed chargers, as well as fuses with a different rated insert current. A short circuit or fire may occur.

When working with the mounting block, do not use metal screwdrivers or other metal tools, this can lead to a short circuit and failure of the mounting tracks of the block.

We invite you to watch this useful video:

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Pinout of mounting block 2110

Circuits protected by fuses

VAZ instrument cluster diagram 2110, 2110, 2111, 2112

Device functions

The described part includes more than a dozen electronic keys, which are responsible for starting the starter, monitoring the health of light bulbs, and switching low/high beams. Also, with the help of a relay, the inclusion of fog lights, windshield wipers (with additional switching of their speed), the inclusion of headlight cleaners, power windows, rear window heating and much more is ensured.

True, not every car has all types of relays, since the front seat heating circuit is present only as an additional option. The same situation applies to headlight cleaners, fog lights and much more.

If we talk about fuses, they are responsible for protecting almost all electrical circuits, with the exception of only the power cables through which current is supplied to the engine and the battery is charged. Some devices protect several power supply circuits with the same currents at once, which causes the failure of several systems if just one fuse fails.

Schematic electrical diagrams, connecting devices and pinouts of connectors