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

If the wipers on a VAZ-2107 car do not work, you can easily fix them yourself without involving car service mechanics. But for this, it is very desirable to have at least an initial understanding of the design of the windshield wiper used in this model.

SL-193 windshield wipers are installed on all “sevens”, both with carburetor and injection engines. Their design uses an electric motor with a gearbox, as well as a lever mechanism and a switch for supplying glass washer fluid. The electric motor is started using a special button located on the steering column. It also allows you to regulate the intensity of the liquid stream.

In addition to the water tank (or “glass washer”), the washer contains a compact pump and nozzles that spray liquid. In addition, it should be noted that there is a fuse that prevents increased loads on the motor and pump and protects them from voltage surges.

Schematic diagram of a glass cleaner on a VAZ 2107

1. fuse;
2. wiper motor;
3. windshield washer motor;
4. relay and fuse box;
5. washer switch (water supply to glass);
6. three-lever cleaning speed switch;
7. VAZ 2107 cleaner relay. Type RS-514. Its mounting location is under the dashboard on the left, attached directly to the body;
8. egnition lock;

The standard wipers on the VAZ 2107 operate in intermittent and continuous modes. If they do not work at all, then first we do the simplest thing: before starting repairs, we check the fuse and the degree of oxidation of its contacts in the mounting block (location F2 for 10 A). The fuse is shared with the washer pump motor. So if the fuse is at fault, then water will not splash on the glass. When changing a fuse, pay attention to the size and color.

If the wipers do not work in rare rain mode, then most likely the relay in the mounting block or the steering column switch itself is to blame. The diagram shows that if there is power on the wire suitable for the relay and the control light is on, or the ammeter deflects the arrow, then the relay is at fault, adjustment will not help, replacement is needed. If there is no current, then there is an open circuit in the steering wheel, and the switch is to blame.

Why did the wipers stop not at the base of the windshield, but “just anywhere”? The gearbox is to blame for this. What should we do with it?

Replacing the gearbox is an alternative, since due to its design, adjustment and repair are difficult, and spare parts are not sold; repair and replacement of its parts (although the size allows) is not carried out, with the exception of the gearbox gear.

What are the most common reasons why a gearmotor fails?

In winter, the wipers of the classic and VAZ 2107 often freeze to the glass after work, since it was warm in the cabin. Sometimes the next morning the driver tries, either by accident or because he is too lazy to get out, to “at random” move them from their place using the cleaning lever.

When stationary, the load on the motor sharply increases, since normally the heat generation scheme is compensated by conversion into mechanical energy, and when the shaft is stationary, the motor burns out very quickly. It is then that repairs are required, or rather, replacement of the gearmotor; adjusting it does not make sense.

Let's look at how this is done on a VAZ 2107.

• We unscrew the wiper levers with an open-end wrench, size 10 or a socket head, then carefully remove the levers from their seats, having first bent them./
• Using an open-end wrench (size 22 mm), unscrew the trapezoid attachment points and remove the plastic bosses - inserts:
• After this, carefully remove the rubber profile - seal on the hood, and disconnect the power supply to the wiper gearbox:
• then we pull it and the wire out of the special hole in the body under the seal, unfold the cover, which performs a protective function, on the motor...
• and unscrew the gearbox mounting nuts, size M10. The most convenient way to use a wrench is:
• now you need to remove the bracket with the rods going to the lever drives together with the gearbox; you need to press the protrusions of the levers inward. They fall down, and after shaking a little - twisting carefully in different directions, the job is done!
• All that remains is to disconnect the gearbox and crank using the end nut (size 10 mm), and also unscrew the 3 nuts with which the trapezoid (bracket) is attached to the gearbox, now you can replace the motor.

In conclusion, we advise: if you have good knowledge of electrical engineering, the circuit diagram is no secret to you and you read it, are comfortable with a soldering iron, you can take on the wipers of the VAZ 2107. Repairing and adjusting them will not be difficult for you; if not, then actions such as replacing the gearbox and fuse, as well as the relay are quite accessible to you.

Tips for motorists

VAZ-2106 windshield wipers are driven by an electric motor that transmits torque through a gearbox to a mechanism that drives the blades. The easiest malfunction of this device to troubleshoot is the weakening of the crank fastening, which occurs due to the loosening of the fastening nut under the influence of vibration. Once you tighten it, everything returns to normal.

Another malfunction that leads to the fact that the blades, after turning off the wipers, do not return to the lower edge of the windshield, occurs due to an increase in the gap between the contacts of the limit switch, or due to their burning. In this case, you will have to either bend or clean these contacts.

If the wipers refuse to work in a mode called intermittent, then the culprit for this malfunction will be the windshield wiper relay. It most likely has stuck contacts or a burnt out winding. The contacts can be cleaned and then the relay will work, but if the winding is at fault, the relay will have to be replaced.

In the cold season , at subzero temperatures, the wiper blades may freeze to the windshield and they will not be able to move when the windshield wiper is turned on. In this case, warm water will help to warm them up.

The remaining malfunctions can be divided into two groups: the wiper motor works, but the brushes do not move and when the electric motor does not work. In the first case, the culprit may be a gearbox whose plastic gear teeth have been cut off. In the second case, when the noise of the windshield wiper motor is not heard, there may be many more reasons. This could be a blown fuse or a malfunction in the wiper switch located on the steering column, as well as wear on the commutator brushes.

Operating principle

On a VAZ 2107 car, the wipers are driven by a 12 V electric motor. A relay is installed in the windshield wiper activation circuit. It is responsible for the intermittent operation of the wipers, which work without interruption or at intervals of four seconds.

The windshield wiper is connected in parallel through the contacts of the closer. They are located in the gearbox housing and are “responsible” for returning the brushes to their original position and abruptly stopping the motor. The driver controls the operating mode of the windshield wiper using the switch. The whole mechanism works thanks to a motor. It is prohibited to operate a car with faulty wipers, so car owners must ensure that they are in good working order. And in bad weather, driving with non-working wipers is very dangerous!

Requirements for windshield wipers.

The windshield wiper circuit has several types of design. With any design, windshield wipers must ensure cleaning of the windshield regardless of the amount of precipitation. Automotive windshield wiper drives usually have two speeds. It should ensure that the brushes are placed in the extreme position when turning off, which does not interfere with the driver’s view.

On modern cars, the windshield wiper drive has an intermittent operation mode. It is provided by a thermal or electronic relay included in the power supply circuit of the wiper drive. This mode can be either with a constant period of time or adjustable. During intermittent operation, one or two cycles of brushes pass across the windshield with breaks of 3 - 5 seconds. In addition, on some cars, for example VAZ classic, the intermittent mode serves as a low-speed wiper drive.

Where does which wire go, or just a diagram

Connecting wipers and washer

“Plus” power is supplied from the ignition switch through fuse No. 2 at 10 Amp of the mounting block. The permanent “plus” goes along the black and yellow wires to contacts “4” of the connectors of the gear motor and the steering column switch. It should not disappear even when the switch is in the “off” position. The blue wire supplies “+” 12 V power to the motor when the switch is in “continuous mode” position. On the blue-white wire, in the “off” position there should be a “minus”, and in the “continuous mode on” position the “minus” is turned off. This is done to slow down the motor when the power to the closer is turned off.

The red wire supplies the relay with “+” 12 V from the switch when the intermittent mode is turned on. At the moment of operation, contacts “2” and “4” close, and “1” and “3” open, the motor starts working and the brushes make one or two movements. Then “+” 12 V is turned off, and contacts “1” and “3” are closed to each other and to “minus”. The motor stops for a few seconds and then the cycle repeats.

The washer pump motor is connected to “+” 12 V constantly with a black and yellow wire through the same fuse No. 2. “Minus” is applied when you press the windshield wiper lever from bottom to top.

Video about how a windshield wiper works

VAZ 2107 wiper malfunctions

Replacing a burnt out motor

During the winter season, at sub-zero temperatures, wipers often stick to the windshield. The wiper motor is under a lot of load, and it burns out if the bimetallic fuse does not work or the fuse burns out.

Location of the glass cleaner and washer fuse in the mounting block

In such cases, it is necessary to replace the motor. To do this, you need to remove all the parts in a certain order:

• Unscrew the fastening nuts;
• bend the lever and remove it from its seat;
• Using a 22mm wrench, unscrew the trapezoid fastenings on both sides;
• remove the plastic inserts;
• remove the hood seal;
• remove power from the windshield wiper motor;
• remove it with the drive from the hole in the body;
• bend the protective cover, unscrew the fastening nuts;
• press on the protrusions of the slots on the reverse side, on which the wiper arms sit, so that they fall inward, move in different directions, the trapezoid with the motor will come out.

Video instructions for replacing the windshield wiper trapezoid

After disconnecting the mechanism parts, you can repair the gear or install a new motor. But the electric motor must be inspected, even if it is in working condition. It is a conventional DC electric motor, the rotation of which, through a worm gearbox, is supplied to a trapezoid.

Walk over the collector with a cloth soaked in solvent. If there is a lot of wear, you need to change the armature or motor. Defects on the gear will require it to be replaced. Assembly occurs in reverse order. Therefore, before installing a replacement electric motor, you need to clean the trapezoid from contamination, lubricate the rubbing elements, motor and gearbox.

Trapezius problems

The trapezoid transmits rotational movements from the electric motor to the wipers and ensures the reciprocating movement of the wipers while cleaning the glass. Interruptions in the operation of wipers occur due to problems with the trapezoid; oxidized bushings and corrosion on the axles lead to jamming and slow operation of the mechanism. You can remove the trapezoid with a flat-head screwdriver. To set the correct position when installing the trapezoid, you must:

• set the motor to the initial position;
• place the crank and short rod parallel to each other;
• After that, attach the motor to the trapezoid.

Wiper relay not working

If the wipers fail to operate in intermittent mode, it can be argued that the relay has failed. First you need to check the power supply to the relay block. To do this, you need to remove the relay, turn on the wipers in intermittent mode, and check the voltage at the terminals. If no current flows, you need to repair the open circuit or replace the switch. The design of the relay is such that it cannot be repaired. So, if it does not work under voltage, you need to replace the part with a new one.

Wiper switch

To check the voltage supply to the switch, you need to remove the pads from the steering control or on the relay connection blocks. There is always voltage on the black-yellow wire. Check on the red and gray wires. If there is no voltage on one of them, then you need to change the switch.

Causes of fuse blown.

If the wipers do not work in two positions of the switch, then most likely the fuse has blown, which serves to protect the circuit from short circuits and overloads. When the wiper control lever is set to the "off" position and the blades do not stop at the bottom of the glass or anywhere else, the problem is in the gearbox. It is there that a special switch is installed, which ensures that after turning off the brushes remain in the desired position.

Due to heavy overload of the electric motor, overheating of the wiring, or exposure to water, the fuse may blow. Replacing it is easy, but the cause of the burnout must be found out and eliminated.

Troubleshooting common problems

Basically, all cases related to the repair of windshield wipers are simple and the repair can be done independently, perhaps except for replacing the trapezoid, but this is only due to the inconvenience of the work being performed.

1. The first thing you need to start with is to check the serviceability of the fuse in the mounting block F2. If it is working, check the presence of voltage on it using a test light or multimeter. Lack of voltage indicates a malfunction of the mounting block.
2. You can check the incoming voltage to the three-position wiper switch by removing the decorative trims from the steering wheel or on the relay connection block. It should be constantly present on the black and yellow wire; by moving the switch to different positions, we check the voltage on the gray and red wires. The absence of voltage on any of them indicates a malfunction of the switch. The presence of voltage indicates a malfunction of the relay or wiper motor.
3. When the wipers stop working intermittently, the culprit may be a faulty VAZ 2107 wiper relay. The wiper relay on the VAZ 2107 is located near the trunk opening handle, under the panel. First of all, you need to check the presence of power on the block; to do this, remove the relay and activate the intermittent mode. The absence of this indicates a malfunction of the three-position switch or an open circuit. If the problem persists when applying voltage, then it is worth purchasing a new relay.
4. When the wipers stop in the middle of the glass, the problem must be looked for in the drive gearbox. This type of malfunction most often occurs in the cold season, when a car owner tries to turn on windshield wipers that are frozen to the glass. The repair consists of installing a new gearbox.
5. If the wiper motor does not work when power is applied, then you need to check the brushes and windings for failure or wear.

Why does the windshield washer not work?

All washer malfunctions are divided into two groups: electrical and mechanical.

Mechanical:

• Lack of liquid. In winter, you cannot use ordinary water, as it may freeze. If the water still freezes, you need to warm up the car engine and leave it in a warm room.
• The fluid supply hose may fly off or become pinched.
• The nozzles can also stop the washer from working. Poor quality of water and washer fluid leads to the fact that the fittings become clogged with dirt, rust, and washer fluid does not flow. The injectors are cleaned or new ones are purchased.

Electrical:

• Fuse F2(10A) has blown.
• The electric motor does not pump, no fluid flows, which means the terminals are oxidized. You need to clean the terminals and contacts and connect everything.
• Faulty switch. If the motor does not turn when voltage is present, then this is the reason.
• Check the pump motor by connecting it directly to the battery; if it starts spinning, then the fault is in the steering column switch.

System diagnostics

To understand the reasons for the inoperability of the windshield washer on the VAZ 2107, you should first of all consider the design of the system. It consists of the following elements:

1. Washer fluid reservoir.
2. A pump with an electric motor, which operates from a 12V network.
3. Nozzles or sprayers of a water jet that hits the windshield.
4. PVC pipes connecting the above elements.

A special liquid is poured into the washer reservoir, one type in summer and another in winter. Winter liquid is called “anti-freeze”, with its help you can effectively wash windows at sub-zero air temperatures, and not worry about the fact that it may freeze in the system.

When the washer is turned on, liquid is sprayed onto the windshield with the simultaneous automatic activation of the wipers. If, when you turn on the device, there are no signs of its performance, then you can determine the cause of the breakdown yourself. The electrical diagram for connecting the washer on a VAZ 2107 is presented below, based on which you can sort out the malfunctions.

We disassemble the turn switch for a VAZ 2107

And although many manufacturers of turn switches claim that this is a completely non-separable design, it can still be disassembled with some effort. Disassembly of devices is necessary when repairing it. It takes place in several stages:

1. Using a 3 mm drill, drill out the 2 upper rivets and remove the upper part that is attached to the tube;
2. After removing this part we see 2 more rivets that hold the ring;
3. Carefully remove the ring from the grooves, then you need to remove additional rings and levers.

We repair the device

In the VAZ-2107, the switches are located under the steering wheel of the car. If you suspect a malfunction, the first thing you need to do is find out the reason why this or that function does not work.

Repairing the switch

We remove the steering column switch on the seven. Having removed the first ring, then the headlight, stop and wiper levers, we get to the mechanism by which the turns are automatically turned off. We take it out and here lies the cause of all the troubles: between the reeds there is a spring that breaks off and does not move the reeds in different directions. It is necessary to replace the spring; you can use a regular spring from a ballpoint pen. Next, we begin collecting all the rings and levers in reverse order. After finishing the work, we check how the levers and the turning mechanism work. To do this, we connect the pads and place the terminals on the battery; if all functions work, then we have completed the repair.

Also, the cause of a malfunction of the turn switch may be contamination or oxidation of the contacts. You can clean dirty or oxidized contacts; to do this, you need to slightly bend the “sagging” springs and other accessible parts. As a rule, after carrying out such cleaning manipulations, it is possible to restore the functionality of the switch.

Video on replacing the steering column switch

In winter, owners of a VAZ 2107 often encounter such a problem as a breakdown of the windshield wiper motor. Often the motor simply burns out; this happens when the wipers simply stick to the windshield in sub-zero temperatures. A large load is placed on the wiper motor and it simply breaks down. Today we will tell you how to replace the windshield wiper motor on a VAZ 2107 with your own hands.

– open-end or socket wrench 22; – socket head 10; – a small extension cord; – a crank or ratchet handle.

It is worth noting that quite recently we considered how a beginner could cope with replacing the thermostat on a VAZ 2107 with his own hands in a garage. The instructions are detailed, so all you need is the necessary tools and desire.

Replacing the wiper motor on a VAZ 2107

1. First of all, you need to unscrew the nuts securing the wiper arms, as shown in the photo below.

2. Then bend the lever and remove it from its seat.

3. Next, take a large 22mm wrench and use it to unscrew the trapezoid fastenings on both sides of both the right and left windshield wipers.

4. Then remove the plastic inserts.

5. Now you need to remove the hood seal, which is shown below.

6. And disconnecting the power plug from the wiper motor.

7. Remove it together with the wire from the hole in the body.

8. Next, we proceed to removing the motor, or rather, unscrewing the nuts that secure it, which become easily accessible after we bend the protective cover.

9. It is most convenient to unscrew using a ratchet handle.

10. After this, we press on the protrusions of the slots on the reverse side, on which the wiper arms sit, so that they fall inward, and after small manipulations with turns in different directions, the trapezoid assembly with the motor should be removed without much difficulty.

11. The final result of the removal procedure is shown in the picture.

12. If you decide to make a replacement, then the new part will cost you around 1,600 rubles completely assembled, that is, both the motor and the trapezoid.

Car wipers and the mechanism that controls them are a simple but important part of any car. If for some reason the device malfunctions or stops functioning altogether, visibility deteriorates, which may cause an accident.

Causes of breakdowns

Among the most common are:

1. Switch malfunctions.
2. The fuse has blown, which happens when:

• if you overload the electric motor;
• allow water to get into it;
• if the wiring overheats.

1. The cause of the malfunction is in the windshield wiper motor.
2. The wiper relay is broken.
3. There is no or intermittent contact in the circuit.

In the event that a fuse has blown, replacing it alone will not be enough; you also need to find the reason why this happened.

Wipers VAZ 2107

The vehicle is operated in different climatic and road conditions. For safe and comfortable movement, the driver must have good visibility of the road situation, i.e. the windshield must always be clean. Windshield wipers provide mechanical cleaning of the windshield from dirt and sediment, improving visibility and increasing safety. We will consider possible problems with this mechanism and ways to eliminate them in more detail.

Principle of operation

The work of the wipers is quite simple and consists of the following sequence of actions:

1. The driver selects the desired operating mode of the windshield wipers using the steering column switch.
2. The entire windshield cleaning mechanism is driven by a motor.
3. The wipers move across the glass left and right at the selected speed, cleaning the surface.
4. When the mechanism is no longer needed, the steering column switch returns to its original position.

Components

The windshield wiper consists of the following main elements:

• lever mechanism (trapezoid);
• electric motor;
• relay;
• brushes

Trapezoid

One of the important elements in the windshield wiper mechanism is the trapezoid. On almost all cars this part is the same, and the difference lies only in the methods of fastening, the size and shape of the elements. The functioning of the trapezoid consists of transmitting rotational motion from the electric motor to the wipers, as well as ensuring the synchronous movement of the latter for high-quality glass cleaning. The trapezoid consists of rods, a body and a hinge.

Motor

The electric motor of the windshield wipers of the VAZ “Seven” is made as a single unit with a gearbox and is one of the main links of the mechanism in question. The motor consists of a stator with permanent magnets and an armature with an elongated shaft, at the end of which a screw is threaded. The purpose of this unit is to ensure the movement of the blades along the windshield. The device is considered reliable and fails very rarely.

Wiper relay

On classic Zhiguli cars, the windshield wiper has two operating modes - fast and intermittent with an interval of 4-6 seconds. It is to ensure intermittent operation that the RS 514 breaker relay is designed. Delayed activation of the wipers is used during light rain, when too frequent operation of the windshield wipers is not required, and when the mechanism is completely turned off, the glass is gradually covered with small drops of precipitation and needs to be cleaned. The product is connected to the general wiring using a four-pin connector. On the VAZ 2107, the breaker relay is located on the driver’s side on the left side panel under the plastic trim.

Brushes

Almost all passenger cars use two windshield wiper blades. On the “seven”, elements with a length of 33 cm are installed from the factory. Longer brushes can be installed, but a greater load will be placed on the electric motor, which will lead not only to slower operation of the mechanism, but also to possible failure of the motor.

Methods for connecting windshield wipers.

The connection diagram for windshield wipers can be divided into two types, depending on the method of connecting the operating mode switch.

In the first connection method, a constant plus is supplied to the wiper drive electric motor, and the mode switch connects the motor elements to the minus. This method is widely used in foreign and domestic cars.

The second method is completely opposite to the first, that is, power is supplied to the electric motor through the mode switch, and the minus in this case is taken from the drive housing.

I propose to consider the principle of operation of a car windshield wiper circuit using an example, where plus is supplied to the electric motor through a mode switch, since this is the more common connection method.

The diagram shows the connection of a windshield wiper drive with an electric motor powered by permanent magnets and having two operating speeds. The difference in speed in this circuit is ensured by the displacement of one of the positive brushes relative to the physical center of the electric motor armature.

Malfunctions of VAZ 2107 wipers and their elimination

Various malfunctions can occur with windshield wipers, which manifest themselves in different ways.

The motor has failed

Often, wipers may not function due to problems with the electric motor. Problems often arise due to the accumulation of friction products in the lubricant in the bushings, which leads to its thickening. As a result, the motor armature rotates with difficulty, which leads to burnout of the winding or burnout of the rotor lamellas. Another malfunction is wear of the electric motor brushes. In this case, when voltage is applied, the wipers do not work and sometimes are triggered when you hit the motor with your hand.

Which one can I put?

Instead of the standard “seven” engine, some car owners install a device from a VAZ 2110. This replacement is justified by the following positive qualities:

• greater reliability and power;
• windshield wiper closer;
• 3 speeds (requires a steering column switch from a Chevrolet Niva).

Such an electric motor is installed without any modifications to the mounting in its standard place. However, despite these advantages, some owners of the “classic” note that due to the higher power of the electric motor, the trapezoid breaks down much faster. Therefore, before making changes to the design of the windshield wiper, it is worth performing preventive maintenance on the old mechanism (clean the trapezoid from dirt and lubricate the rubbing elements and the motor itself with the gearbox).

The standard device also copes quite well with its tasks if it works properly.

Removing the motor

The windshield wiper motor is located behind the partition of the engine compartment on the left side. To dismantle the mechanism, you need to prepare the following list of tools:

• open-end or socket wrench 22;
• socket head 10;
• small extension cord;
• crank or ratchet handle.

We remove the part in the following order:

1. Pull the terminal off the battery negative.
2. Using a 10mm wrench, unscrew the nuts holding the wiper arms.

Motor repair

To troubleshoot the electric motor elements, it must be disassembled.

The only tools you need are a set of screwdrivers. We disassemble the node in the following order:

Unscrew the screws securing the plastic cover.

Trapezius problems

The fact that problems have arisen with the windshield wiper trapezium is indicated by interruptions in the operation of the wipers. They can appear in the form of an arbitrary stop during operation or too slow movement of the brushes. In addition, a sign of problems with the trapezoid are jumps or extraneous sounds during operation. The problem is caused by the appearance of oxide in the trapezoid bushings, as well as corrosion on the axles. If such faults are neglected, then over time the electric motor will fail due to high loads.

Mechanism repair

To remove the trapezoid, we perform a similar sequence of actions as when dismantling the windshield wiper motor. The only tool you need is a flat screwdriver. We disassemble the mechanism in the following order:

We remove the stoppers from both shafts by prying them up with a screwdriver.

Video: replacing the trapezoid on the “seven”

Correct installation of the trapezoid position

After carrying out repair work on the trapezoid, you need to set the correct position of the mechanism. To do this, perform the following steps:

We set the motor to the initial position, for which we connect the block with wires, turn on the windshield wiper mode using the steering column switch, turn it off and wait until the electric motor stops.

Video: adjusting the position of the wipers

Wiper relay not working

When there is no intermittent operation of the windshield wiper, the main reason is a breakdown of the breaker relay. The way out of the situation is to replace the device.

Relay replacement

To remove the relay you will need a Phillips and flathead screwdriver. We carry out the work in this order:

Use a screwdriver to pry up the side panel holders and remove it.

Wiper switch malfunction

The “seven” steering column switch is responsible for enabling the following functions:

• turns;
• head lighting;
• wipers and windshield washer.

The switch is highly reliable and fails extremely rarely. However, sometimes it still has to be changed and this happens due to burnt contacts or wear of individual elements of the mechanism. To work you will need the following list of tools:

• head 24;
• head or key 8;
• crank or ratchet;
• flat screwdriver.

Switch replacement

To replace the switch, perform the following sequence of actions:

Use a screwdriver to pry up the decorative steering wheel trim and remove it.

Fuse burned out

A common cause of wipers not working is a blown fuse. On the VAZ 2107, the operation of the windshield wipers is controlled by a 10 A fuse link F2 located in the fuse box.

The mounting block is installed under the hood near the windshield on the right side.

Checking and replacing the fuse

If the wipers stop functioning, then first of all it is worth checking the integrity of the protective element. To do this, you can use a multimeter by turning it on to dialing mode. If the part is working properly, then the resistance will be zero. Otherwise, the element needs to be replaced.

Why does the fuse burn?

Sometimes it happens that a fuse-link burns out for no apparent reason. In this case, you need to check the entire electrical circuit from the power source to the motor. Failure of the fuse indicates a short circuit, i.e. too high current consumption exceeding the rating of the protective element. The problem can also be caused by a short circuit in the wiring to the housing, jamming of the trapezoid due to lack of lubrication in the rods, which indicates the need for inspection and preventive maintenance of the mechanical part of the unit.

Windshield washer does not work

To remove dirt from the windshield, the washer is used together with the windshield wiper. The device sprays water or a special liquid. The main elements of this mechanism are:

• fluid reservoir;
• motor;
• nozzles;
• connecting tubes.

During the operation of a car with a washer, various problems may arise that lead to its inability to work:

• motor failure;
• fuse blown;
• kinking of tubes;
• breakdown of the steering column switch;
• poor contact on the power supply circuit.

Checking the motor

It is easy to check if the washer pump is not working properly. To do this, just open the hood and pull the lever of the steering column switch, which is responsible for the function of supplying fluid to the windshield. At this moment, the operation of the motor will be clearly audible. If this does not happen, then the malfunction may be caused either in the pump itself or in the fuse or other part of the electrical circuit. To make sure that the problem lies in the motor, we use a multimeter to measure the voltage when the washer is turned on. If there is voltage, but the pump does not work, then you need to take care of replacing it.

Video: checking the wiper motor on a “classic”

Injectors

If the motor is running, but liquid is not supplied through the nozzles, then the problem will not be difficult to identify, since there are only a few reasons for this phenomenon:

• clogged injector fittings;
• the supply tube has come off;
• kinking of the tube.

The malfunction can be determined by inspecting the tubes from the motor to the injectors. If there are no areas with kinks and the tube has not fallen off, then the reason lies in clogged nozzles, which can be cleaned with a sewing needle and blown out with a compressor.

Fuse and mounting block

The integrity of the fuse is checked in the same way as for windshield wipers. The same protective element as for the wipers is responsible for the operation of the washer. In addition to the fuse, sometimes the track in the mounting block through which power is supplied to the washer burns out. In this case, you need to disassemble the fuse box and restore the current-carrying element by soldering, having first cleared the varnish from the track.

Understeering's shifter

You should start checking the steering column switch on a VAZ 2107 if the fuse, motor and the entire electrical circuit through which voltage is supplied to the pump are in good condition. In this case, the wiring should not have breaks, melted insulation or other visible damage. To check the steering column switch, only a multimeter will be enough. Having disconnected the connectors from the device in question, we connect the probes of the device in the dialing mode with a two-pin block. If the switch is working properly, then when the washer is turned on, the device will show zero resistance. Otherwise, the mechanism will have to be replaced.

Video: checking the wiper mode switch

Disassembling the gearbox

If the wiper does not work due to contamination of the gearbox, then it will not be difficult to clean it. But under no circumstances should you unscrew the adjusting screw installed in it - otherwise, you most likely will not be able to correctly return the armature clearance.

• remove the protective panel from the gearbox;
• remove the gear;
• take out the cage nuts, having previously unscrewed two bolts;
• the gearbox housing is disconnected together with the brush holder from the motor;
• the anchor is removed and cleaned with a compressor.

Removing the rear wiper is generally done using the same method, but you will also have to remove the door trim to get to the wires and other parts.

Wipers for headlights

Some owners of “Sevens” install windshield wipers on the headlights for ease of use of the headlights. With the help of these elements, there is no need to constantly clean the optics from dirt manually, which is especially important in rainy weather. To implement the mechanism, the following list will be required:

• headlight cleaner motors 2 pcs. (left and right);
• two transition strips;
• brush leads;
• brushes;
• washer reservoir with two pumps;
• five-pin relay;
• wiring with blocks;
• solenoid valve from the G8;
• tee and washer tube about 2 m.

As for the brushes themselves, they can be installed from both VAZ 2107 and VAZ 2105.