Relay and fuse blocks VAZ 2112: description and explanation

Modifications of mounting blocks and fuses of the VAZ 2112 have changed more than once during the production of the model. Radical innovations were introduced only in 2002 after the appearance of a 16-valve injector.

In 2006, there was only one unit in the cabin, and in 2007 a console unit was added to it. This happened thanks to changes in the shield and gearbox, and the addition of a Europanel. The cover of the main unit became hinged, which simplified access to the fusible elements. Separate inserts outside the mounting blocks, for example, under the brake pad, have been preserved.

VAZ 2112 fuse diagram

With an 8-valve and 16-valve engine, it is equipped with a main mounting block, and since 2008 an additional console has been added. A diagram with element markings is printed on the left side of the main block cover and placed below.

The designations of all elements are presented below. You can find the transcript in the table.

Relay

• K1 - lamp health monitoring;
• K2 - windshield wiper;
• KZ - direction indicators and emergency lights;
• K4 - switch on low beam;
• K5 - high beam;
• K6 - additional relay;
• K7 — heated rear window;
• K8 - rear PTF.

Starter fuse and relay

Installed on the device itself between the engine and the fan radiator. If signs of a malfunction appear, it is better not to delay replacing the element and install a new relay.

Fuel pump fuse and relay

Located in the additional interior installer - No. 3. Responsible for the fuel pump relay No. 5.

Relay and fuse for cigarette lighter

No. F18 is rated at 25 Amps.

Stove

The 25 A element F18 is responsible for protecting the operation of the electrical circuit of the heater motor.

Turn signals

The elements are marked as F19 and are rated at 10 Amps.

Brake lights

Located in the main block - No. F17. Its power is 7.5 A.

Where is the alarm fuse located?

No. F16 and rated 10 A.

Cooling Fan

The F7 element with a power of 20 Amperes is responsible for its protection.

Which fuse goes to the radio?

This is an F4 rated at 20 A.

Window lifters

F5 at 30 A.

Fuse and relay for central locking VAZ 2112: where is it located

They can be found in a separate box behind the main mounting block.

Ignition

The main relay is located in the additional cabin unit, where it is number 6.

Reverse

F19 with a rating of 10 Amperes is responsible for the lamps.

Fogs

Protected by three inserts: right - F4, left - F14, and rear - F20. The power of all PTFs is 10 Amps. In case of tuning, you may need to replace them with new ones along with the fog lights. The connection occurs via switch K8.

Lamp health monitoring relay

Marked as K1 in the main block of the VAZ 2112.

Brake

Installed under the brake pedal.

Relay and fuse for injectors

The additional element F3 is rated at 15 Amps.

Fuse for interior light

The F17 element with a power of 7.5 A is responsible for the safe operation of the VAZ 2112 interior lighting lamp.

Number plate illumination

Corresponds to F1 with a rating of 5 Amps.

Generator

A three-level relay voltage regulator is located on the device. It is better to replace the factory element with a new one, since three-level voltage regulation often leads to a short circuit.

Heated rear window

Relay K7 is responsible for turning on. Protects the F8 electrical circuit with a rating of 20 Amps.

Seat heating

It is protected by a 20 Amp F15 insert.

Wiper relay

This is a K2 and without its stable operation there will be no washer supply to the windshield, and the wipers will not be able to do their job.

Charger

They placed it next to the device - one of the few elements of this kind under the hood of a car.

Low and high beam VAZ 2112

It is protected by fuses F2 and F12 (left and right headlights), and the high beam is protected by F3 and F13 (left and right). The first has a rating of 7.5 A, and the second has a rating of 10 A.

Fuse for the dashboard of VAZ 2112

Located in the wiring harness leading to the instrument panel from the battery.

Dimensions

There are 2 fusible elements - F1 and F11, left and right. The power of both is 5 Amperes. Factory fuses require replacement due to the fact that the dimensions often burn out due to their malfunctions.

Heated seats

It is protected by an element marked F15 for 20 Amperes.

VAZ 2112 speedometer fuse: where is it located?

He's gone.

Opening the trunk

This is an F1 and is rated at 5A.

Fuse F6

Responsible for protection against burnout of the car socket. Its rating is 15 Amperes.

VAZ 2112: fuse F17 blows

Most often, this element, which is responsible for interior lighting, fails due to a battery failure. Its power is 7.5 A.

Fuse F19

Responsible for protecting the brake light, reversing lights and dimensions.

Relay K1

An element of lamp serviceability, which in older versions is replaced by a jumper.

Relay K6

This is a reserve item.

Speed ​​sensor

Located on the wiring harness leading to the device.

Location

The relay and fuse mounting block is located on the left side of the steering column in the instrument panel.

Types of mounting blocks

Block 2110-3722010

Block 2110-3722010-01

Block 2110-3722010-08

Device

The part looks like a small square box with four connectors. It consists of an armature in a housing containing an electromagnet with a winding. Its operation is ensured by electrical contacts and return springs.

The electromagnet is represented by two independent coils with holding and retracting independent parts. The first of the devices is docked with the housing and connected to the control input. The retractor coil goes to the control terminal and communicates with the starter motor.

Inspection of cigarette lighter wiring

If after replacement the protective element burns out again, you should look for the cause elsewhere.
It lies not in the VAZ cigarette lighter fuse, but in faulty wiring. If the car is old or due to improper manipulation of the electrical system, the wires may shorten and burn out, or an open circuit may occur in the circuit itself, causing the cigarette lighter fuse to trip. It is advisable to inspect the cables for kinks or abrasions. This failure should be diagnosed using a multitester. The wires coming to the cigarette lighter are tested for resistance. If there is no power, then one of the cables is broken.

To repair the cigarette lighter on a VAZ, you will need a soldering iron with rosin and tin, working cables and insulating tape.

Structural features

Drivers call a device such as a starter a starter, as it helps to start the car. It is practically no different from similar mechanisms. However, if you need to purchase a starter relay for a VAZ-2112, then you need to remove the part from the car and take the store with you. This element differs from similar ones in size. You can purchase a device from the VAZ-2111 or 2110 models, as it is completely identical.

On the twelfth model of the Zhiguli, the installed starter is of modest size. However, this small device is very functional. The technical documentation describes how the structure of the mechanism differs and where the VAZ-2112 starter relay is located. In the photo you can see the main and additional blocks.

These cars were equipped with injection power units with 16 valves. To prevent electrical current fluctuations, a relay is used. When the electrical circuit is turned on, this device passes current, gradually equalizing the voltage to a value of 80-340 amperes. This scatter of indicators is explained by the fact that the relay produces the first parameter in a resting state, and the second in operating mode. As soon as the vehicle stops, this circuit opens and the circuit shuts down.

Table of external connections and connectors of the VAZ-2110 mounting block.

Video with reasons for fuse failure

There are additional faults that can cause the device to break down. These include.

1. Bad contacts. Over time or heavy use, the connection inside the cigarette lighter may become loose. Incorrect connection of devices leads to loose sockets and poor contact. This can be treated by bending the metal tendrils on the cartridge or by resoldering.
2. With age, oxides or rust appear on the cigarette lighter, which has a bad effect on its operation. The situation can be corrected by treating the contact areas with a needle file. It is necessary to clean them and remove all traces of corrosion on the cigarette lighter. Another malfunction of the cigarette lighter on a VAZ is a burnt-out nichrome spiral. It is recommended to replace the device here.

Due to these factors, the protective element can also burn out. The video below will help you figure out where the fuse is located and how to repair the VAZ 2110 cigarette lighter.

Brief information

The car window fuse is just one of a whole list of elements that are somehow involved in raising and lowering the window. In fact, the most basic component, without which the glass would not move, is an electric motor equipped with a relay. Depending on the direction in which electric current is passed through the motor, the glass can rise or fall.

Direct control of the power windows is carried out through a button that can be pressed in one of two positions. Accordingly, depending on which direction the pressure is applied, the glass can move in one of two possible directions, opening fully or partially.

However, like any other electrical circuit, power window wiring and, as a result, all elements present in it can be subject to voltage surges or current, the value of which exceeds the maximum operating threshold of the devices. In order to protect equipment sensitive to voltage surges from failure, a fusible element is built into the power window circuit.

The operating principle of such a fuse is quite simple. A thin thread of conductor is built into its body, which connects opposite contacts to each other. The thread parameters are selected in such a way that when a current exceeding the threshold is supplied, the thread heats up and melts due to its high resistance, due to which the current stops connecting the contacts together.

If this happens, the element must be replaced immediately. The fuse itself costs a penny, but all the equipment, including the motor and relay, retains its functionality and does not fail for quite a long time, if, of course, the current threshold of the fuse element is selected correctly.

How to remove

In order to remove the VAZ-2112 starter relay, you need to disassemble the entire system. Therefore, this mechanism is removed along with the starter. On the other hand, this is even better, because at the same time as repairs, you can prevent starter breakdowns. To remove the starter, you need to drive onto an overpass or inspection hole. Further removal of the part is carried out in this order:

1. Disconnect the battery, thereby de-energizing the vehicle.
2. Remove the mudguard or other protection
3. Find the nut at the bottom of the starter and unscrew it
4. Disconnect the terminal located on the solenoid relay
5. Remove the top nut that holds the starter in place.
6. Unscrew the tape with a flat-head screwdriver and remove the relay by pulling lightly on the housing.

If this block is removed with force, then you need to lift it a little to unhook it from the fasteners. You need to be careful not to lose the spring located inside the mechanism. Often she jumps out and gets lost. Now that the device is disconnected from the starter, you can perform troubleshooting and find out why it broke.

Relay

K1

• Lamp integrity monitoring relay (4412.3747 / 2110-3747410)

K2

• Windshield wiper relay breaker (524.3747 / 2110-3747710)

K3

• Relay-breaker for direction indicators and hazard warning lights (492.3747 / 2108-3747010-02)

K4

• Relay for low beam headlights (113.3747 / 2105-3747210-10)

K5

• Headlight high beam relay (113.3747 / 2105-3747210-10)

K6

• Additional relay (71.3747-01 / 2110-3747310-01)

K7

• Relay for turning on the heated rear window (113.3747 / 2105-3747210-10)

K8

• Rear fog lamp relay (113.3747 / 2105-3747210-10)