VAZ 2107 windshield washer does not work: DIY repair

Windshield wiper device

In order to repair non-working wipers of a VAZ 2107, you need to know the structure of the windshield wiper (the author of the video is Avtoelektika VC).

Schematic diagram of a glass cleaner

On sevens, a windshield wiper of the SL-193 type is installed. It is located in the engine compartment in the heater air plenum box. Its electrical circuit is similar to the electrical circuit of the glass wipers on the VAZ 2106.

Electrical circuit of the purifier

• fuse;
• electric motor of the unit;
• fuse box;
• a switch that supplies water to the glass;
• a switch that changes the speed of movement;
• relay;
• egnition lock.

The windshield wiper consists of a lever mechanism, brushes, levers and an electric motor with a gearbox. The mechanism is turned on using a switch on the steering column, which also turns on the washer motor. Thanks to the motor and gearbox, a rotational movement is created that drives the trapezoid.

VAZ cleaner gearbox

The shafts are connected to the gearbox by rods and transmit oscillatory movements. As a result, the brushes move across the surface and clean it of dirt.

A washer is installed to remove dirt. The design of the VAZ washer includes: a motor, a pump, nozzles and a reservoir. The motor starts the washer pump, which pumps up the fluid in the washer reservoir. It sprays onto the glass through the nozzles.

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.

Common faults and solutions

The reasons why wipers do not work on cars, regardless of whether it is a UAZ or a S7, are basically the same. Below are the malfunctions and methods for eliminating them.

The problem is mainly mechanical - the trapezoid breaks. When repairing wipers, many replace standard products with frameless ones. They have an attractive appearance, adhere better to the glass, and do not have hinged joints, so they are not affected by dirt and icing.

Frameless brushes for cars

The design of a glass cleaner is a complex mechanism consisting of a large number of parts. Any of them can fail, which will lead to either a complete failure of the mechanism or poor cleaning of the glass.

If you understand the electrical circuit of the windshield wiper mechanism, you can do the maintenance yourself.

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.

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.

The wipers do not reach the extreme point

Often, owners of domestically produced cars are faced with a problem when, when turning off the wipers, the blades stop at the point where they were, that is, they do not return to the lowest position. The problem with such incorrect stopping of the brushes is directly in the drive gearbox. The gearbox is equipped with a limit switch, which is activated by a cam. The cam is designed to control the position of the brushes after the power to the switch lever disappears.

A breakdown occurs mainly when the driver turns on the windshield wipers that are frozen to the glass. As a result, the gearbox fails and must be replaced with a new one.

Windshield wiper circuit work.

Zero position.

The circuit consists of a fuse F, a three-position switch SA, a permanent magnet motor M and a limit switch SQ. The zero position of the SA switch corresponds to the off state of the vehicle's windshield wiper. If the switch is moved to this position after working, then the electric motor will stop only after the limit switch SQ is opened, which occurs when the wiper blades are in the extreme position.

Closing the electric motor brush with the SQ switch to ground leads to dynamic braking and a sharp stop of the electric motor, which prevents the moment of shutdown and re-supply of power to the electric motor brushes through SQ, which will lead to non-stop operation of the electric motor.

First position.

When switch SA is moved to the first position, power from fuse F through the switch contacts will flow to the motor brush and the drive will operate at low speed.

Second position.

If you turn on the second position, then the additional brush of the electric motor, displaced relative to the negative brush, will receive power, which will lead to a change in the magnetic flux of the armature and an increase in the rotation speed.

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.

Possible problems when removing the battery

When removing the battery, the owner runs the risk of encountering some problems. Their specifics depend on the equipment of the machine. For example, there are nuances for cars with a radio, alarm and on-board computer.

Signaling

For some car alarm models, power failure is associated with theft, so an alarm may sound. In addition, such alarms can block the doors at any time. Therefore, before removing the battery, the autonomous power supply of the alarm must be turned off. This is done with special keys that come with the alarm system.

You should first make sure that the car keys are in your pocket and not inserted into the ignition. It is better to leave one of the doors open, since when the battery is removed, the information from the alarm key fob may be erased.

Radio/cassette player

Most radios do not have their own power source, and when the battery is disconnected, the settings are most often lost. Therefore, after returning the battery to its place, you will have to re-tune the radio stations.

On-board computer

The on-board computer is responsible for the operation of all the electronics of a modern car. Usually it has separate power supplies where the most important settings are hidden, but their resource may be exhausted. In this case, the computer begins to be powered from the common system.

Some cars may have several on-board systems (for example, the Volkswagen Faeton has 6). After removing the battery, they all turn off and important settings are lost. To avoid unnecessary problems, in this case it is better to contact a service station to remove the battery.

Removing the battery is a procedure that must be approached responsibly and seriously. If you follow the instructions, you can avoid a lot of troubles, from a harmless failure of the settings in the radio to significant damage to the electronics and the battery itself.

Repair of wipers on VAZ 2107

Wipers play an important role in the operation of any car. The VAZ-2107 car is equipped with a pair of wipers that clean the windshield when it rains. Operating a vehicle without wipers is strictly prohibited. When your windshield wipers refuse to work, it's time to get them repaired. There are a lot of reasons for the malfunction of windshield wipers, so in the material we will pay attention to the features of repairing these products on a VAZ-2107 car.

Windshield wiper device

Before repairing faulty wipers, you need to understand their design features. The main components of wipers are:

• Electric motor.
• Electric washer pump.
• Circuit breakers.
• Control relay.
• The switch is a three-position switch that regulates the speed of the brushes.
• Brushes.

Actually, this is what cleaning the windshield from rain, dirt and dust in the summer is based on. If the wipers of the VAZ 2107 do not work, then the cause of the breakdown must be sought in one of the listed elements. What are the main types of malfunctions, we will consider further.

Possible windshield wiper malfunctions

The main types of malfunctions include the following reasons:

• the switch has failed, which happens in frequent cases;
• the fuse has blown, which could have happened as a result of an overload of the electric motor, water getting on it or overheating of the wiring;
• poor circuit contact or lack thereof;
• windshield wiper motor malfunction;
• breakdown of the VAZ 2107 windshield wiper relay.

If the breakdown consists of a blown fuse, then replacing it will not be enough; it is also necessary to find the true cause of such consequences. Next, we will consider the main types of wiper malfunctions on the VAZ-2107 with a detailed description of their solutions.

The wipers stopped turning on

If the wipers on a VAZ-2107 do not work in two switch positions, then the reason is most likely hidden in a blown fuse. This element is located on the fuse block and serves to protect the circuit from overloads and short circuits.

Checking the fuse is the first thing you need to start repairing. To check, you should use a tester, or simply exchange it for a known good one of the same rating. In rare cases, fuse contacts may oxidize and need to be cleaned and replaced.

Windshield wipers do not operate in intermittent mode

If a situation arises in which the wipers do not function in interrupt mode, then the breakdown should be looked for in the wiper relay. The cyclic operation of the products is ensured by closing and opening the contactor of the control relay. To check, we try to supply power to the relay block. In practice it looks like this:

1. the relay is removed;
2. use the switch located near the steering wheel to turn on the wiper switch;
3. Using a tester, you need to check whether there is voltage at the terminal.

If there is no power, the switch needs to be replaced. The reason may be a break in the control circuit, so it is necessary to find and eliminate this defect. If there is power, but the relay does not operate, then it needs to be replaced. The relay cannot be repaired, so it only needs to be replaced.