Why the signal does not work on the VAZ-2107 and what to do

On a VAZ-2107 car, depending on its modification and year of manufacture, two paired or one sound signal 20.3721-01 can be installed, located in the front part of the engine compartment. On the body of the device there is an adjusting screw for adjusting the sound tone and two terminals for connecting the +12V power supply (red wire) and the signal activation button located on the steering wheel (gray wire with black stripes). The device's power supply circuit is protected by fuse F7 (15A) in the mounting block. The main malfunctions may be a complete absence of signal, a weak or hoarse sound.

Complete absence of signal

The reason for this may be:

• fuse blown;
• breakage or damage to connecting wires;
• oxidation or poor contact in connectors;
• malfunction of the signal activation button;

To determine the cause of the malfunction and eliminate it, we first check the integrity of fuse F7 in the mounting block. After this, we check the +12V power supply to the device (red wire), for which you can use a tester or test lamp. If there is no voltage, check for breaks and integrity of the wire insulation (replace if necessary), clean and crimp its tip.

If there is power supply at the terminal with the red wire, we short the second terminal for connecting the button (gray wire with black stripes) to ground with a piece of wire. If the sound signal is triggered, then the fault must be looked for in the connection circuit of the signal button or in the button itself (broken wire, oxidation of contacts). If the signal does not work, then the reason is itself and it must be replaced.

Hoarse or weak signal sound

The reason may be:

• device misadjustment;
• damage to the insulation of connecting wires;
• oxidation or poor contact in the connectors or signal button;
• malfunction of the device itself.

To eliminate such a malfunction, first of all, we try to adjust the signal using the adjusting screw on its body. To do this, press the button on the steering wheel and, with the signal working, turn the screw using a slotted screwdriver in one direction or the other until the sound of the desired tone appears.

This procedure is most conveniently performed with an assistant. If it is not available, you can use a suitable size block to press the signal button, resting it against the back of the seat. With a paired circuit, we adjust the signals one by one, disconnecting the gray wire of one of them.

If the signal sound cannot be adjusted, check the insulation of the wires, strip and crimp the connector contacts and the signal button, and then try again to adjust the signal sound using the adjustment screw.

If you then adjust the sound signal

fails, it must be replaced. To do this, disconnect the “ground” from the battery, disconnect the wires from the terminals and use a “13” key to unscrew the signal mounting nut

And we remove the signal

We install the new signal in the reverse order. In this case, the wires can be connected to the terminals in any order.

The sound signal, also called a horn, plays an important role in ensuring safety on the road, as it makes it possible to attract the attention of other road users. The article discusses the situation when the signal does not work on a VAZ 2107: causes of malfunctions, methods of elimination, the possibility of its repair and replacement.

Checking operation and repairing in case of sound signal malfunctions

There are three malfunctions: it doesn’t sound when needed; works when not needed, or sounds intermittently, hoarsely, quietly. Unlike the high-voltage ignition system, which is little affected by the quality of the connection, the horn system is low-voltage. This means that the film of oxides and rust significantly impedes the passage of current. But signals are a powerful current consumer. The current in the circuit is at least 4-5 A.

The quality of all contacts must be perfect, otherwise repairs will be needed constantly. Remember that the car body itself is a “negative” contact, and in the direction of current movement, all oxides settle on the “plus”. Pay special attention to stripping the terminals of the red, “positive” wire.

The “negative” part of the chain is longer. Therefore, most often this is where malfunctions occur. Therefore, it is immediately necessary to check the serviceability of the signal and look for an open circuit. To do this, you need to attach the gray-black “negative” wire from the sound signal to a cleaned place on the case, i.e., “short to ground,” and the “positive” wire directly to the battery. Then turn on the ignition. If there is sound, it means there is a break somewhere in the negative circuit. If there is no sound and the positive terminals are cleaned, then the signal itself is faulty.

Common faults:

• fuse blown (replace)
• The contacts have oxidized, or the relay has burned out (needs replacement).
• if there is a jumper, the contacts have oxidized and weakened; clean or change;
• the paddle on the switch under the steering wheel is broken, the slip ring on the steering wheel has worn out (this happens when the car wears out significantly, and also among those who like to honk constantly).

Possible malfunctions: signs and causes

In order to understand the reasons why the horn does not work, you need to understand:

The circuit consists of the following components:

• sound devices;
• mounting block;
• jumpers for contacts installed in place of the relay;
• signal switch.

The sound signal is activated by a button located in the center of the steering wheel.

There is a contact ring on the steering wheel, and a spring-loaded contact in the area of ​​the steering column switches. Modern ones are equipped with an adjusting screw for adjusting the volume and a built-in relay (in the mounting block, the relay outputs for the sound signal are short-circuited with a jumper).

Signs of malfunction:

• no sound when pressing a button;
• The sound does not turn off or turns on randomly;
• hoarse, quiet or intermittent sound.

The audio system carries low voltage current, so the quality of the connections is important.

If there is a large amount of oxides and rust on the contacts, then the passage of current becomes difficult. Klaxons require a powerful current of at least 4-5 A.

It is necessary to carefully monitor the cleanliness of connections and terminals, otherwise repairs will be needed constantly. Since the car body acts as a minus, and oxidation settles on the plus, special attention should be paid to stripping the terminals on the positive red wire.

The negative branch of the chain is the longest, so it is most likely to have a break. To determine the cause of the malfunction, you need to connect the gray-black wire coming from the signaling device to the body, and the positive wire directly to the battery. Then . If the sound appears, it means there is a break in the minus value. If there is no sound and the positive terminals are cleaned, then the device has failed.

If the sound signal on a VAZ 2107 does not work, the following malfunctions are possible:

• fuse is blown;
• contacts and terminals have oxidized;
• the relay has failed;
• the connections on the jumper, if present, have oxidized;
• the paddle on the steering column relay broke;
• development of a slip ring.

After diagnostics, the faults found should be eliminated (video author - Alex Life).

We diagnose the signal and its activation buttons

In order to find out whether your car uses a correctly working signal, you should disconnect its wires from the relay and connect them directly to the battery. If the sound does not appear in this case, the causes of the breakdown may be the following:

• contacts located directly in the device body are burnt or heavily soiled;
• The signal is not configured correctly, causing the dial tone to sound very low or not audible at all.

Troubleshooting is done by adjusting the signal (to do this you just need to turn a special screw installed in the back of the case) and cleaning the contacts.

Another reason why the signal may not work is a broken or worn button. To restore its normal functioning, you can either replace the entire part, or again put the contacts to which the wires are connected in perfect order.

Methods for troubleshooting

If a fuse or relay has failed, they must be replaced with new parts. If the slip ring is worn out, then it is unlikely that you can repair the steering wheel, since the slip ring is difficult to find on sale. In this case, the most reasonable thing is to replace the steering wheel.

If the horn makes hoarse sounds or turns on intermittently, you should use a multimeter to check whether the battery is charging and the voltage is flowing to the terminals. If everything is fine with the power supply, the reason may be in the sound device itself. There is a screw on the horn body to adjust the volume. It should be rotated until the wheezing disappears and the sound becomes loud.

If adjusting the volume does not help eliminate the wheezing, you will have to disassemble the device to clean the contacts. You can also replace the membrane. Sometimes hoarse sounds appear when starting the engine. In this case, it is necessary to check the condition of the breaker contacts and the top plate. The contacts should be thoroughly cleaned and the plate replaced if necessary.

Signal interchangeability

If the alarm device cannot be repaired, it must be replaced with another one.

All modern horns can be divided into two types: pneumatic and electromagnetic (video author - Russia 24).

In the first type of sound signals, the air flow moves from the compressor through a pipe, which, under the influence of vibration, begins to make sounds. Pneumatic devices differ in the shape of the tube and the power of sound. The frequency range of the audio signal covers several audio zones. Several pipes can be installed, but they require a powerful compressor.

The operation of an electromagnetic device is based on an electromagnet, which is connected to the main element of a horn of this type, a membrane. The core winding is connected to a power source (battery) using a breaker. The horn button is connected to ground. When you press it, the core rod begins to move, thus exerting an effect on the membrane. The result is a powerful sound.

Electromagnetic horns differ in the design of the sound emitter:

1. Disc horns (“pancakes”). They are manufactured in two versions: non-separable and collapsible. In addition, it can be closed or open.
2. Snail sounds. They are curved, making them difficult to install. The open end of the socket should point forward. “Snails” make it possible to get a very loud sound.
3. Horns have a tube that looks like a straightened snail. Outwardly they look like a horn or a trumpet. They are convenient to install under the hood, but their sound power is weak.

Pneumatic type horn

Disk signal

Klaxons horns

When choosing a sound device, you should pay attention to several nuances:

1. Before purchasing, you should evaluate the capabilities of the battery. It is important that its charge is sufficient to power the buzzer, as it consumes a large amount of energy.
2. You should check with the seller whether the horn needs additional power or a compressor.
3. High frequencies produce a subtle sound. Low frequencies are suitable for bass lovers.
4. It must be remembered that trucks have a 24 V on-board network, and passenger cars have 12 V. It should be noted that the use of “quacks” and special signals is prohibited.

The feasibility of self-repair

Self-repair is possible if the driver is well versed in electrical engineering. Car enthusiasts who do not have such skills can replace a fuse, relay or clean the terminals.

If the contacts are not oxidized, but burned out, then it is easier to install a new signaling device. If you know how to make a signal on a VAZ 2107, you can do the repairs yourself - this will give you the opportunity to gain experience in electrical repair work and save money at the service station.

If the signal on a VAZ 2107 is lost, it should be repaired as quickly as possible, since its malfunction increases the risk of an accident.

In addition, according to traffic rules, operating a car without a sound signal is prohibited. Therefore, it is impossible to pass a technical inspection with a faulty horn.

The VAZ 2107 car is equipped with a sound signal, consisting of two signals of different tones, located on the bracket on the left side of the radiator. In a variant version, the VAZ 2107 car can be equipped with one sound signal mounted on a bracket behind the radiator trim. Sound signals are activated by shorting their negative terminals to ground through a relay. An assistant will be required to complete the work.

Adjusting the sound signal on a VAZ 2107 car

1. To turn off one of the sound signals, remove the tip of the gray-black wire from the sound signal output. 2. An assistant presses the horn switch and holds it pressed. Using a slotted screwdriver, smoothly rotating the screw clockwise or counterclockwise, we adjust the sound signal, achieving the clearest, loudest sound. 3. In a similar way, we adjust another sound signal by disconnecting the corresponding wire. If bad sound cannot be eliminated, the horn should be replaced.

Note To adjust the single sound signal, remove the radiator trim (see “Radiator grille VAZ 2107 - removal and installation”). We remove the sound signal from the VAZ 2107 car along with the bracket (see “Removing a single sound signal”). Having connected the wires to the sound signal, and holding the bracket with pliers, adjust the sound signal by rotating the screw.

Removing a double sound signal from a VAZ 2107 car

1. To replace the sound signal, disconnect the wire from the negative terminal of the battery (see “Battery for a VAZ 2107 car - removal and installation”). 2. Disconnect the wire tips from the audio signal output. 3. Using a 13 mm socket wrench, unscrew the nut securing the sound signal.

A car horn is a very important detail that ensures traffic safety and helps prevent collisions with other cars and a collision with a pedestrian who suddenly runs out onto the road. Different car models use different horn designs, but in our article we will talk about the original VAZ-2107. From it you will learn on what principle the signal works, what modifications of it can be used in these machines, and also what to do in the event of a breakdown.

Replacement

This must be done in the following sequence:

1. We disconnect the negative terminal of the battery just in case.
2. Carefully, using a screwdriver (preferably the screwdriver slot is small), pry up the “Lada” badge in the middle of the steering wheel, which is a plug, and pull it out. As a result, we see a 24 nut inside.
3. We put the steering wheel in a position so that the wheels “look” straight.
4. We take the head of the required size, insert it into the extension, and then put it on the nut. We insert the crank into the extension, rest our knees on the steering wheel so that it does not turn when unscrewing the nut, and with a sharp movement of the crank counterclockwise we try to twist the nut. I don’t recommend unscrewing the nut completely, because... The steering wheel sits firmly on the shaft and, if removed abruptly, can hit you in the chest painfully.

5. Then we take the steering wheel in both hands and rock it, from side to side, pulling it up. Moreover, it is desirable that the range of movements be frequent. When our steering wheel hits the nut, unscrew it completely and completely remove the steering wheel from the shaft.

With these simple manipulations and using a simple tool, you can remove the steering wheel on a VAZ-2107.

After removing the steering wheel, you need to inspect the copper horn contact located on the steering column. If necessary, clean it and bend it.

If your horn does not work, you must first remove the steering wheel in the sequence indicated above, and only then unscrew the screws on the back of the steering wheel to remove the panel along with the fasteners and contact plate, placing the steering wheel on the workbench.

Because it is easier to do this in the public domain than to look for holes by touch in the limited space of the car interior. And, as a rule, the sound signal does not work precisely because of the contact that is located on the steering column, so it may not be necessary to completely disassemble the steering wheel.

Where is the signal located on a VAZ-2107 car?

The domestic automaker is releasing to the market several modifications of the VAZ-2107 car model, which is beloved by consumers. The design and location of each of them has a number of its own features:

• in some versions of the car, only one sound signal is used, which is mounted immediately behind the front lining of the cooling radiator. In this case, you can easily reach the part and replace it if the need arises;
• A number of modifications are equipped with two sound signals at once. They are installed directly behind the radiator and have different tones, which makes it possible to quite loudly warn pedestrians and drivers of other cars about the possible danger of a collision.

The RS-528 sound signal relay is mounted in the mounting block of both machines, which is often one of the main causes of breakdowns of this part.

In addition, the circuit can include fuse F7, which prevents the supply of excessively high voltage and its surges, as well as a button located directly on the steering wheel.

Sound signal VAZ-2106.07 high tone LETZ S309 — Leave a review

Article: C309, additional articles: 21030-3721010-00, 2103-3721010

Order code: 003074

Designation - C309 Name - sound signal

Applicability: KamAZ vehicles. Design features: set of horn signals.

Specifications:

— rated voltage, V: 12; — current consumption, A: 7.5; — sound pressure level at a distance of 2 m, no more: 105. 118; — fundamental sound frequency, Hz: 480. 510; — 1-wire circuit; — weight, kg: 0.39.

The main manufacturer is JSC LETZ

Information used: Avtokomplektatsiya LLC

Video review Sound signal VAZ-2106.07 high tone LETZ Product video review Sound signal VAZ-2106.07 high tone LETZ in the online store AvtoAll.ru F29oTopIz-g

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By giving sound signals using a car horn, safety on the road increases and the number of accidents is minimized, because most of them can be prevented by giving a warning signal in time. In addition to the safety function, the original horn provides the car with its own unique personality.

Today, the next article in the series “Crystal VAZs or typical breakdowns of domestic cars” is dedicated to the “classics”: VAZ-2101, 2103, 2104, 2104, 2105, 2106 and 2107. These cars have been driving along our roads for decades and, despite Despite all the shortcomings that we will talk about, their popularity is still high.

Checking the functionality of the relay and fuse

What to do if the signal on a VAZ-2107 car does not work, and for what reasons can it fail? The most common one is a blown fuse. Under increased load, it fails and interrupts the electrical circuit, thereby eliminating more serious emergency situations.

If you are faced with the problem of a blown fuse, you must replace it immediately. In addition, you will need to carefully inspect the contacts of this part, carefully clean them of carbon deposits and dirt, or perform repairs.

The next stage of diagnostics is to check the functionality of the sound signal relay. If it clicks when you press the button, then the cause of the breakdown needs to be looked for elsewhere. Otherwise, the relay will need to be replaced, which can be done within a few minutes even without the relevant experience.

Sound signal. (Klaxon) ALL QUESTIONS | Topic author: Halila

Hello everyone. The horn doesn't work. The fuse is intact. What's the problem?

Vasily (Tamiko) ring the wires, take off the cover on the end of the steering wheel, maybe it doesn’t close there, I had the same crap, or try another horn, maybe this one doesn’t work

Artem (Glanmor) I had this happen, when you press the signal you can hear the switch clicking, everything rang, the signal itself is also normal, but there is no sound, but it was solved by a light blow on the steering wheel and now everything has been working for 2 years, no problems.

Vladimir (Sumiko) thank you all for your help)))

Vasily (Tamiko) Vladimir, at least you fixed it.

Pasha (Madoka) It happened to me that the signal itself made clicks instead of sound. There is a screw on the “pipe”, if you turn it, you can change the tone of the signal, but if you unscrew or tighten it too much, the signal will not work, it will just “click”