Ignition relay VAZ 2107: all the secrets

Small and inconspicuous parts of a car are almost always ignored by drivers, because the chassis or the engine itself seems more important and requires special care. However, big problems with the car most often arise due to some "little thing" - for example, the ignition relay. This is a miniature device that plays a very important role on the VAZ 2107.

Ignition relay VAZ 2107

On the very first versions of the VAZ, there was no fuse and relay box, that is, power was supplied to the coil through the ignition switch itself. Such a system for starting the motor "ate up" a lot of electricity, besides, the contacts quickly underwent oxidation and ceased to function normally.

A modern ignition relay is installed on the VAZ 2107. Its main function is to reduce the load on the contacts when the device is turned on, since the relay turns off some electrical circuits at the time of startup. The ignition relay is used in both carburetor and injection models of the VAZ 2107.

The miniature device allows to reduce the load on the contacts, which prolongs the life of all ignition elements

Principle of operation

The ignition relay is one of the elements of the entire ignition system. This system consists of:

• spark plugs;
• distributor;
• capacitor;
• breaker cam;
• coils;
• mounting block;
• switch.

When the engine starts, power from the spark plugs goes to the ignition relay, which switches energy from some circuits. Thanks to this, the coil is supplied with the amount of power that is necessary for the regular start of the motor. For the uniformity of the current supply, the relay works directly with a distributor and a capacitor.

Location of the relay in the car

Any problems with the ignition relay on the VAZ 2107 begin with the fact that the driver cannot start the engine the first time. Suspicions immediately arise regarding the performance of certain nodes, but, as a rule, it is the relay that is tested first. On the "seven" it is located immediately behind the dashboard and is fixed under the torpedo. Such an arrangement cannot be called convenient, because to get to the relay, you will need to remove the dashboard completely.

The ignition relay is located in the common block directly behind the instrument panel in the passenger compartment

Table: designations of relays and fuses

Fuse number (rated current) *	Purpose of fuses VAZ 2107
F1 (8A / 10A)	Rear lights (reverse light). Reverse fuse. Heater motor. Furnace fuse. Signaling lamp and rear window heating relay (winding). The electric motor of the cleaner and washer of the rear window (VAZ-21047).
F2 (8 / 10A)	Electric motors for wipers, windshield washers and headlights. Relay cleaners, windshield washers and headlights (contacts). Wiper fuse VAZ 2107.
F3 / 4 (8A / 10A)	Reserve.
F5 (16A / 20A)	Rear window heating element and its relay (contacts).
F6 (8A / 10A)	Cigarette lighter fuse VAZ 2107. Socket for portable lamp.
F7 (16A / 20A)	Sound signal. Radiator cooling fan motor. Fan fuse VAZ 2107.
F8 (8A / 10A)	Direction indicators in alarm mode. Switch and relay-interrupter for direction indicators and alarms (in alarm mode).
F9 (8A / 10A)	Fog lights. Generator voltage regulator G-222 (for parts of cars).
F10 (8A / 10A)	Instrument combination. Instrument panel fuse. Indicator lamp and battery charge relay. Direction indicators and corresponding indicator lamps. Signaling lamps for fuel reserve, oil pressure, parking brake and brake fluid level. Voltmeter. Devices of the carburetor electropneumatic valve control system. Relay-interrupter lamp signaling parking brake.
F11 (8A / 10A)	Brake lamps. Plafonds of internal illumination of a body. Stoplight fuse.
F12 (8A / 10A)	High beam (right headlight). Coil for turning on the headlight cleaner relay.
F13 (8A / 10A)	High beam (left headlight) and high beam indicator lamp.
F14 (8A / 10A)	Clearance light (left headlight and right taillight). Indicator lamp for turning on the side light. License plate lights. Hood lamp.
F15 (8A / 10A)	Clearance light (right headlight and left taillight). Instrument lighting lamp. Cigarette lighter lamp. Glove box light.
F16 (8A / 10A)	Dipped beam (right headlight). Winding for switching on the headlight cleaner relay.
F17 (8A / 10A)	Dipped beam (left headlight).
* In the denominator for pin-type fuses

More about electrical equipment VAZ 2107: https://bumper.guru/klassicheskie-modeli-vaz/elektrooborudovanie/elektroshema-vaz-2107.html

Types of relays used on the VAZ 2107:

1. Relays and pin-type fuses located in the mounting block.
2. Rear window heating relay.
3. Relay for switching on cleaners and headlight washers.
4. Relay for turning on sound signals (jumper installed).
5. Relay for turning on the electric motor of the cooling system fan (not used since 2000).
6. Relay for turning on the high beam headlights.
7. Relay for dipped headlights.

The VAZ 2107 uses only 7 main relays

The driver needs to know that the ignition relay on all VAZ 2107 models is installed next to the emergency power relay. Both devices have the same potential, therefore, in case of breakdowns on the road, an emergency relay can be installed in place of a blown ignition relay.

The ignition relay and the emergency power relay have the same structure and potential, therefore they are considered interchangeable

Is the relay the same in carburetor and injection models

VAZ 2107 has a very long history of development. Today, all existing models can be divided into two types: old and new. Both carburetor and injection VAZ 2107 use exactly the same ignition relays, however, you should carefully select a new relay based on the year of manufacture of the car.

Any type of power unit can be equipped with an old-style ignition relay, that is, the device can be considered universal. However, the new model relays are suitable exclusively for the "sevens" after 2000 of release.

The old block uses relays of different sizes and shapes, the new ones use standard parts with increased performance.

How to check the ignition relay on the "seven"

You can check the ignition relay right on the car, so this procedure can be done by yourself and in two to three minutes. However, for accuracy, it is recommended to arm yourself with a multimeter or at least a conventional indicator light. Next, you need to act according to the following algorithm:

1. Remove the connected block from the relay.
2. Inspect contacts for oxidation, breakage and contamination.
3. If necessary, you need to clean the contacts.
4. Connect a multimeter to the relay contacts.

After energizing the relay, it is necessary to measure the voltage that the device produces. If there is no short circuit when current is applied to terminals 85 and 86, then the relay is faulty. The operability of the relay is determined by the closure of contacts between 30 and 87 pins. The numbering of the outputs is indicated on the relay itself on the reverse side.

Read about the contactless ignition system: https://bumper.guru/klassicheskie-modeli-vaz/elektrooborudovanie/zazhiganie/zazhiganie-2107/elektronnoe-zazhiganie-na-vaz-2107.html

Video: do-it-yourself relay check

https://youtube.com/watch?v=xsfHisPBVHU

Replacing the ignition relay on the VAZ 2107

To replace the ignition relay yourself, you do not need a special tool. You can easily get by with the devices that any driver has in the kit:

• screwdriver with a straight and thin blade;
• screwdriver with cross blade;
• wrench for 10.

Using ordinary screwdrivers, you can remove the ignition relay in a few minutes

If the relay has stopped working, then it is impossible to restore it, since initially the device of this part does not imply repair work. Therefore, in case of problems with the relay, you can only replace it with a new one.

Having reached the burnt out relay, it remains only to pull it out and install a new one in its regular place

The procedure for both injection and carburetor models of the VAZ 2107 will be the same. To create a safe environment during replacement, it is recommended to remove the negative wire from the battery of the machine before starting work. Then proceed according to the scheme:

1. Removing the instrument panel begins with unclenching the clamps with a screwdriver.
2. Remove the handles from the levers that hold the shield.
3. Pull out the air duct nozzles by prying each of them with a screwdriver blade.
4. Immediately after the nozzles, pull towards you and pull out the heater mode switch, having previously disconnected the wires from it.
5. Next, remove the tips of the lines from this switch.
6. Using a screwdriver, pull out the self-tapping screw and its plug.
7. Unscrew the nut on the machine mileage reset knob with a 10 key wrench.
8. Drive the handle as deep as possible into the dashboard.
9. Then remove the right edge of the shield.
10. Disconnect the nut that secures the speedometer drive cable of the car.
11. Remove the hose from the fitting.
12. Remove the wire blocks that go to the panel.
13. After all these works, you can remove the instrument panel.
14. The ignition relay is located immediately behind it, on a special bracket. Using a 10 wrench, unscrew the fixing nut and remove the relay.
15. In place of the failed device, install a new one, perform installation work in the reverse order.

Read also about the VAZ 2107 starter relay: https://bumper.guru/klassicheskie-modeli-vaz/elektrooborudovanie/rele-startera-vaz-2107.html

Photo: main stages of work

The shield rests on simple latches, so it will be very easy to remove it.

All devices with wires must be carefully pulled out from behind the shield.

After disconnecting the block, you can dismantle the shield itself

Disconnect the contacts from the relay and pull out the device

Video: relay replacement procedure

replacement starter relay

You can independently restore the performance of your car using ordinary screwdrivers and wrenches. All types of work with the ignition relay are available even to a novice driver, so you should not pay the service station specialists once again to deal with the relay.