Where is the VAZ turn signal relay located and how to replace it

The relay is designed to inform pedestrians and other drivers about a change in traffic or vehicle maneuver. Depending on the modification of the car, it is located in the engine compartment of the car, or under the dashboard in the cabin.

Turn signal malfunctions - symptoms

• The absence of flicker is one of the obvious and frequent signs of device failure.
• No shutdown when turning the steering wheel.
• Very frequent blinking (often the cause may be a burnt-out lamp, or the power of the lamp does not correspond to the rating)
• Annoying clicking sound.
• Turn indicator dimly lit.
• Lights up but doesn't blink.
• Sticking.
• The hazard warning button is faulty.

To eliminate the causes of the turn signal malfunction, it is necessary to check and, if necessary, replace the VAZ turn signal relay.

Purpose of the turn relay

The Traffic Rules in force in Russia clearly state that when making maneuvers, it is necessary to turn on the direction indicators, and in their absence, indicate the direction of movement with your hand. However, now most cars and motorcycles are equipped with turn signals, so you rarely need to use your hands to indicate the direction of travel.

When turned on, the direction indicators flash, that is, they light up and go out at certain intervals, so they attract the attention of other road users, and it is quite difficult not to notice the turn signal being turned on. The blinking of direction indicators also serves another role - it does not allow drivers to confuse their activation with the activation of brake lights or the activation of side lights.

Periodic turning on and off (that is, the same blinking) of the direction indicator lamps is realized using a simple device that is part of the vehicle's electrical system - a turn relay, which is often simply called a breaker or breaker relay.

The breaker relay included in the turn signal circuit performs three functions at once:

• Supplying electric current to the direction indicator lamps (that is, turning on the “turn signals”);
• Ensuring intermittent operation of the direction indicator lamps (their blinking);
• Creation of characteristic clicks, signaling to the driver of the car that the direction indicators are working.

In cars of the Volzhsky Automobile Plant of various generations and models, several types of turn relays are used, which have different operating principles and characteristics.

• Turn relay VAZ, GAZ (installed in the unit) AVAR

  300 ₽

• Turn relay VAZ-2108,2110,GAZ-31105,GAZelle Next EMI

  170 ₽

• Turn relay VAZ, GAZ AVAR

  390 ₽

• Turn relay VAZ-2104,05,06,07 4-pin. AUTOPRIBOR

  480 ₽

• Turn relay VAZ-2108,2110 EM

  220 ₽

• Turn relay VAZ-2101-03 AVTOPRIBOR

  290 ₽

• Turn relay VAZ-2104-07 AENK-K

  240 ₽

• Turn relay VAZ-2108-10, M-2141 AUTO RELAY

  125 ₽

• Turn relay VAZ 04,05,07 1111 (781.3777) (4-pin) SOGDIANA

  80 ₽

• Turn relay AUDI 100 BOSCH

  1 328 ₽

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Restoring the turn signals

Traffic regulations prescribe a special method of warning about maneuvers, which must be used if the turn signal lamps stop lighting on the road. Let's look at why turn signals don't work and how to eliminate the cause of the breakdown. We will talk about the design, operating principle and malfunctions of systems using turn signal relays based on integrated circuits. We will not consider old designs with bimetallic plates, as well as completely electronic systems, due to their specificity and low prevalence.

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Types of breakers and their features

Modern rotary relays are mainly divided into two types: thermoelectromagnetic and electronic. Each device has its own advantages and disadvantages, and this will be discussed. Thermal electromagnetic relays contain a core with two contact groups and side armatures. In addition, they have a copper wire winding. The contacts leading to the light bulbs are connected to a thin nichrome wire, which, in turn, is connected to a plate that is connected to the core.

In the normal state, when no current flows into the circuit, the plate is not adjacent to its base. When the electrons begin to move, the nichrome wire heats up, elongates, and shorts the core plate. The lights come on. Afterwards, the nichrome cools down, the plate comes off again, the current changes direction, and the light bulbs burn at full intensity. Since the cooling-heating process occurs quite quickly, 1-2 times per second, the turn signals blink. Since the light bulb located on the instrument panel is also connected to the circuit, it also begins to pulsate. The specific clicking of the breaker is a consequence of the cyclic impacts of the armatures on the contacts.

Flashing car turn signals

A relay of this type was installed on all cars for quite a long time, but it had (and has) a significant drawback. Over time, the nichrome wire stretches and the turn signals no longer work. Besides this, there is another point. If one of the light bulbs burns out, the load on the others increases significantly. In recent years, thermoelectromagnetic relays are practically no longer installed on cars. They have been replaced by more reliable electronic breakers.

Electronic turn signal relays are built on the same principle as thermal ones, but instead of a nichrome wire, there is an electronic circuit made of transistors. The control chip contains an algorithm that produces automatic pulses that, at certain moments, supply current to the core winding. The operation of the device itself is as follows: after voltage is applied to the transistors, frequency pulses are sent from them, having the oscillations that are set by the program in the microcircuit. As the current passes through the circuit, it attracts the armature, closing the contacts leading to the lighting fixtures, causing the bulbs to light up. Since the cycle consists of signals of different frequencies, they either work at full intensity or dim.

Electronic turn signal relay

The advantage of electronic breakers is that they are more reliable than thermal ones. In addition, if one of the light bulbs in the circuit burns out, the others continue to work without unnecessary load. True, in some cars the circuit is designed in such a way that in this case the warning lamp on the instrument panel stops blinking. This is done specifically to additionally signal a malfunction. True, there are some disadvantages here too. First of all, such a relay creates radio interference and can affect the operation of many devices. The second negative factor is that the short circuit protection here is very weak, and at the slightest drop in electrical voltage the breaker can easily burn out.

Location in the car

There are two types of location of turn signals in the classic VAZ family of cars, depending on the modification:

Let's start disassembling

1. Early modification models

To get to the relay, you need to remove the plug by unscrewing the bolt on the dashboard.

We pull the entire panel towards us, move the sensor panel a little to the side so that we can get to the relay.

• The contacts approach the relay from below.
• Disconnect the contacts.
• We remove the old device and install the new one.
• We put the dashboard back, sliding it into the side grooves.
• Screw in the bolt.

We check the turn signals for flickering and characteristic clicks. The frequency of contact closure should be approximately 1 time per second.

The technology is very simple. The main difficulty here is accessibility to the relay. The space under the panel of these models is small, getting there is problematic.

1. Later models

• Remove the screws from the steering column switch housing. We remove the casing elements.

• Unscrew the mounting bolt.
• We take out the devices on the electrical wiring inside the cabin.
• We replace the old relay with a new one.
• Screw it back. We put the covers in place.

Important: it is recommended to replace the relay itself or the mounting block as an assembly, given that the wiring often burns out and restoring the contacts is quite problematic.

When replacing any of the above relays, special attention should be paid to contact insulation. Insulation is performed using hollow mass braiding. To tie the wires, use a special strip clamp.

Circuit assembly

The entire circuit is assembled on a miniature printed circuit board measuring 35 x 20 mm; it can be manufactured using the LUT method. The tracks must be tinned after etching, then the copper will not oxidize.

First of all, resistors and a diode are soldered onto the board. After them, everything else is a pair of transistors, electrolytic capacitors and a terminal block. It is important not to confuse the pinout of the transistors and the polarity of the capacitors, otherwise the circuit will not work. When all the parts are soldered onto the board, be sure to wash off the remaining flux and check the correct installation.

If turn signals and emergency lights do not work: common faults and their elimination

Turns relay

Until recently, the main element of turn signal and hazard signal systems was the turn relay. In the middle of the last century, turn relays with a bimetallic plate were used. In some models of budget cars and trucks they are still used to this day. Along with simplicity and low cost, they are more reliable and maintainable. A typical relay circuit is shown in the figure:

The core of the circuit is a bimetallic strip. It is included in the circuit of current flow through the turn lamps. When turning on the turns or emergency lights, it is in a non-heated state, and closes the circuit of the warning lights, they turn on. As the bimetallic plate is heated by the flowing current, it changes its geometric dimensions (bends).

A little physics: a bimetallic plate consists of two (bi) bonded plates with different coefficients of thermal expansion. When both plates are heated, one expands more, the other less, hence the deformation. When bending, the plate opens the relay contact, the current stops flowing, the lamps go out, the plate cools down again, the contacts close, the lamps light up, the plate heats up... So ad infinitum. If one of the lamps burns out, the current will be less, the plate will heat up more slowly, and the blinking period will increase. If there is a short circuit in the circuit, the lamps will flash quickly. Everything is very simple, reliable and informative. Such relays have been used for more than half a century.

Nowadays, combined relays with a built-in electronic circuit are used.

Such circuits are less reliable and often fail, especially from unknown manufacturers. Relays are usually mounted either on the steering column or in the fuse box under the dash. This is done so that their operation can be heard by the driver. In modern cars, there is an additional buzzer in the dashboard that duplicates the turn indicators. Such relays cannot be repaired; they must be replaced.

Video - what to do if the turn signals and emergency lights of the VAZ 2114 do not work:

Turn switch

Another, no less important, element of the turn signal system is the switch on the steering column. It is usually reliable, but given the frequency of its activation, especially in urban traffic, it often fails.

In order to replace it, you need to remove the plastic steering column protection cover. The switch is usually secured with latches, sometimes with screws. Dismantling is not difficult.

Some craftsmen undertake to repair them. It’s better to change it right away, maybe for a used one, if there is no other option.

Faulty wiring, lamellas, lamps

Detecting the location of electrical wiring damage is difficult because the system serves the rear parking lights. The wires to them go through the interior; often the lamps are located on the trunk door. The most common places for electrical wiring damage are:

• under the thresholds, especially the driver's and front passenger's;
• in the corrugated adapter for wiring to the trunk lid;
• in the connector of headlights and lamps.

If one of the light bulbs does not light, first of all you need to ring it; if it is working, tighten the slats and contacts of the socket into which the light bulb is inserted.

Modern cars often use LED emitters. Despite the high reliability of LEDs individually, emitters as part of an LED line often fail. It is better to contact specialists for repairs. You can solve the problem yourself by replacing the faulty diode in the line. Its power is usually in the range from 0.2 to 1.0 watts.

Hazard switch

If it is not operational, all lamps may flash when the turns are turned on. This is also possible with a faulty turn switch on the steering column. In some cars, such as the VW Passat, the turn signal relay is located in the emergency button.

The cost of such a new button is small; in case of malfunction, it is better to replace it with a new one.

Malfunction or software failure of the body control unit

In cars produced after 2010, sometimes the functions of switching turn signals and activating the hazard lights are transferred to the body control unit. On the one hand, this is correct: centralized control is required. But this makes system repair much more difficult. Firstly, it is no longer possible to do without computer fault diagnosis. Secondly, to eliminate the malfunction, you will most likely have to “get into” the body control unit; this should only be done by an experienced specialist.

Blown fuses

The fuses that serve the turn signal and hazard warning systems rarely fail. If they burn out, it is necessary to check the condition of the wiring, lamp contact lamellas, and replace the fuse accordingly.

The most common malfunctions and their causes

• The hazard warning lights work, the turn signals do not turn on - there is a malfunction of the turn switch;

• The turn signals work, the hazard warning lights do not work - the turn signal button is faulty;

• Neither the turn signals nor the emergency lights work - there is a malfunction of the turn signal relay (or poor contact), blown fuses, failure of the body control unit;

• increase in the blinking frequency of indicator lamps - short circuit of wiring, lamellas of turn lamps;

• reduction in the blinking frequency of indicator lamps - broken wiring to the turn signal lamps, burnt-out lamps, poor contact in places where lamps are installed, connectors, failure of LED strips.

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We are looking for a breakdown with our own hands

Primary diagnostics can be carried out with a test light, but a tester is required to check the condition of the circuit. If you know how to use a multimeter, then in resistance measurement mode you can independently “ring” the wiring for a break.

The search for the reason why the turn signals and emergency lights stopped working should begin with studying the electrical circuit. We recommend that you refrain from self-repair if you are unfamiliar with the basics of electrical engineering and methods for restoring wiring.

If you clearly hear the relay clicking when you turn on the right/left turn signal, check the resistance of the section of the circuit with the steering column switch. If only the left or right side does not work, the reason is definitely in the switch or in the wiring of the circuit from it to the light bulbs.

If the turn signal relay does not click at all, check the condition of the contacts, the positive wire and ground. If, after turning on the ignition, “+” does not come to the relay, the problem is most likely in the section of the circuit from the mounting block to the relay.

Understeering's shifter

The cause of the malfunction can be either mechanical damage to plastic or contact elements, or the formation of carbon deposits. During operation of the turn signals, the contacts may burn out, which increases the resistance and reduces the current in the circuit. It is typical that in the case of oxides and carbon deposits, the indicator relay may click, but the lamps will not light up.

To repair the steering column switch, you will need to remove it from the steering column and disassemble it. There are many contact pads inside the case, so for trouble-free assembly, remember the location of all moving elements.

Removal and installation of pyrotechnic products requires compliance with safety regulations. Therefore, we recommend reading how to properly remove the airbag.

Where is it located and how to check the turn signal relay

The turn signal relay is located in the fuse box in the passenger compartment or under the hood. You can find out the exact location from the repair and operation manual of your car. Often on the inside of the mounting block the purpose of the relays and fuses is graphically depicted.

Soldering of elements from the circuit, microcracks in solder joints, failure of the main microcircuit are the most common causes of turn signal failure.

The hazard warning button imitates the steering column turn switch, but closes both contacts at once (on the right and left sides). The video shows the design and operating principle of a simple system, analogues of which are used not only on VAZ cars.

Removing relay type 494.or 642.3747

1. Under the instrument panel on the driver’s side, disconnect the connecting block from the turn signal relay

2. Using a 10mm wrench, unscrew the nut and remove the relay.

Diagram for checking the presence of voltage in the relay block

Relay test circuit

Electronic breakers type 494.3747 and 642.3747 do not require maintenance during operation.

These breakers cannot be repaired; if they fail, they must be replaced.

Relay test

Install the new relay in reverse order.

Replacement method

To carry out operations you will need:

Key head set to “10” (preferably with a ratchet mechanism); Plastic puller or similar device; Pliers; Phillips screwdriver.

Before replacing the Niva turn signal relay begins, disconnect the negative terminal from the battery. Access to the element being replaced is provided by removing the dashboard.

1. Take a screwdriver and release the instrument from the two self-tapping screws.

Breaker relays, LEDs and buzzer

Recently, many cars began to use LED lamps as lighting elements in turn signals. Attempts by our “craftsmen” to simply replace them with light bulbs lead nowhere. Many people have absolutely no idea how the relay itself functions, and have absolutely no idea that it needs a little additional work.

Modification of the turn signal relay

Anyone who is familiar with radio electronics and has experience assembling radio devices knows what to do - you need to solder a small electronic board into the breaker, the circuit diagram of which is available on the World Wide Web. If you don’t have the skills to communicate with semiconductors, then if you want to use LEDs instead of ordinary light bulbs, it’s best to contact a car service specialist.

Another interesting solution today is the sound module for the direction indicator. In this case, instead of measured clicks there will be other signals. Some craftsmen build a sound alarm themselves; the circuit is quite simple, and the components are not difficult to find. The main thing is to connect it correctly into the circuit. There are, of course, commercial versions; with this purchase you can also configure the type of backup turn signal signaling. Most new cars come with a sound breaker as standard.

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Causes of malfunctions

Malfunctions of the turn relay are usually associated with a violation of the electromagnetic patency in the relay itself. The cause may be burnt or shorted contacts, swollen capacitors, failure of the electronic circuit, etc. Typically, the cause of relay failure can be identified by the characteristic manifestations of the malfunction.

• If the turn signals are constantly on and do not blink, then most likely the cause of the malfunction is a breakdown of the electromagnetic part of the relay. Most often, this is due to shorted contacts due to their burning.
• Unusual blinking of the turn signals (too fast or too infrequent) may also be due to the turn signal relay. However, in this case, you can look for the problem in other places. Possible reasons for this behavior of the indicators may lie in oxidation of the lamp socket or base, or a break in the wire going to the lamps. This phenomenon also often occurs after replacing standard incandescent lamps in direction indicators with LEDs. If none of these possible reasons is confirmed, then, most likely, the breakdown still lies in the relay.
• Another option for incorrect operation of the turn relay is that the indicator lamps do not light up at all. This phenomenon occurs when the relay contacts burn out. However, this manifestation of a malfunction is also typical for other breakdowns: a blown fuse, an open circuit or a broken turn switch.

Conclusion

The turn relay is a small but extremely important component of a car's warning light system. It allows the driver to be more predictable for other road users, which, of course, has the best effect on traffic safety and, to some extent, comfort. If the relay fails, the problem cannot be ignored under any circumstances. Fortunately, the relay is not an expensive component of lighting systems, so a car enthusiast can take two devices at once with almost no loss of budget - the second one will be in the trunk, garage or at home in reserve. This is exactly what we advise you to do.

Spare parts for Nissan primera

Left turn signal glass
PRIMERA sedan (P11) (09.96 - 01.02)

Search for a new relay

If the option of repairing a broken relay does not suit you, then you should immediately start looking for a new device. In fact, this solution is the simplest and most reliable, although it will not satisfy the car enthusiast’s inquisitive mind and desire for experimentation. A new relay costs little money, and on the modern auto parts market it will not be difficult to find a suitable analogue. You can search by:

• VIN code of the car;
• The code of the existing and failed relay or the codes of its analogues;
• Auto parameters.

Practice shows that today motorists are increasingly looking for the necessary spare parts according to the parameters of their vehicle. In particular, the make, model and year of manufacture are important. Modern online stores with their cross-code databases allow you to quickly select both the original relay and its analogues. A special feature is the selection of relays based on key parameters, some of which we indicated in the previous paragraph . When searching by the parameters of the relay itself, it is easy to make a mistake (or even not find complete documentation at all), but if successful, you will be able to find either the same original or a completely identical analogue.

Multivibrator system

This is a more modern circuit solution, implemented on semiconductor elements - transistors or microcircuits. The bottom line is that triodes operate in switch mode - they are capable of performing the functions of a switch. There are many disadvantages to systems of this type, but there are also plenty of advantages. Despite the almost equal ratio, they are successfully used in many imported cars. Of course, the “cooler” the car emblem, the more reliable the multivibrator control circuit for the direction indicators.

The parameters of this relay are such that everything depends on the characteristics of the individual elements used in the circuit. So, if the transistor is used with a higher gain than necessary, or its current-voltage characteristic is unstable, the operation of the system will be incorrect - the indicators will either be constantly lit or will not work at all.

Often such symptoms occur when the voltage increases (for example, at 12 V everything works, but at 13 V it doesn’t). You can fix it yourself if you disassemble the case and install resistors with high resistance in the collector and base circuits. An easier solution is to solder a zener diode at the power input, which will maintain the voltage level at one value (for this you need to select the right type of device).

Another version of the VAZ-2101 scheme

Outdoor Lighting

1 – Headlights 2101 2 – engine compartment lamp; 3 – battery; 4 – generator; 5 – reverse light switch; 6 – fuse block; 7 – indicator lamp for external lighting in the instrument cluster; 8 – glove box lighting lamp; 9 – instrument cluster lighting lamp; 10 – plug socket for a portable lamp; 11 – instrument lighting switch; 12 – external lighting switch; 13 – brake light switch; 14 – ignition switch; 15 – lamp switches located in the front door pillars; 16 – lamp switches located in the rear door pillars; 17 – lampshades; 18 – trunk lighting lamp; 19 – rear lights; 20 – license plate light; 21 – reversing lamp

Turning on the headlights 2101

1 – headlights VAZ 2101; 2 – battery; 3 – generator; 4 – fuse block; 5 – headlight switch; 6 – external lighting switch; 7 – ignition switch; 8 – indicator lamp for high beam headlights in the instrument cluster

Direction indicators

1 – sidelights VAZ 2101; 2 – side direction indicators; 3 – battery; 4 – generator; 5 – ignition switch; 6 – fuse block; 7 – relay-interrupter of direction indicators; 8 – indicator lamp for direction indicators; 9 – direction indicator switch; 10 – rear lights

Sound signals 2101

1 – sound signals; 2 – battery; 3 – fuse block; 4 – sound signal switch; 5 – generator VAZ 2101.

Wiper circuit

1 – generator VAZ 2101; 2 – battery; 3 – ignition switch; 4 – windshield wiper switch; 5 – windshield wiper relay; 6 – windshield wiper gearmotor; 7 – thermobimetallic fuse; 8 – windshield wiper switch located in the glass washer pump; 9 – fuse block.

Useful: VAZ-2105 diagram

Heater fan Zhiguli

1 – generator VAZ 2101; 2 – battery; 3 – ignition switch; 4 – fuse block; 5 – heater switch; 6 – additional resistor; 7 – heater fan electric motor.

Additional block

It is located under the center console and is covered with a lid. One part is accessible from the right side.

Designation

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1. 15A - Ignition module, controller
2. 15A - Canister purge valve, vehicle speed sensor, oxygen concentration sensor (heating), air flow sensor
3. 15A - fuel pump, fuel pump fuse, injectors
4. Electric fan relay
5. Fuel pump relay
6. Main relay (ignition relay)

The other part is on the left side of the console:

Decoding

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1. Central locking control unit
2. Immobilizer block
3. Relay for turning on rear fog lights.

On our channel we also prepared a video on this publication. Watch and subscribe.

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