VAZ 2107 injector wipers do not work reasons

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.

Malfunctions

If the wipers do not work completely, this may be due to the following reasons:

Blown fuse.
Malfunction of the switch responsible for turning on and selecting the mode.
Inoperative relay.
Poor contact in the electrical circuit.
Faulty windshield wiper motor VAZ 2107.

It is also possible that the wipers on the VAZ 2107 do not work well. This may be due to:

increased friction of axles in brackets;
electric motor malfunction.

The breakdowns listed are the most common. Fixing them doesn’t take much time if you know in advance where to look for the problem. If it was not possible to immediately determine the fault, why the wipers on the VAZ 2107 do not work, then it is better to check each element of the system in turn until the fault is found.

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:

Washer fluid reservoir.
A pump with an electric motor, which operates from a 12V network.
Nozzles or sprayers of a water jet that hits the windshield.
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.

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.

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.
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.
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.
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.
If the wiper motor does not work when power is applied, then you need to check the brushes and windings for failure or wear.

Common causes of a blown fuse include:

— At idle, the battery charge indicator flashes, and when the lights are turned on or the engine speed increases, the flashing stops. The reason for this is the oxidation of fuse No. 10; it begins to work as parasitic resistance. It is necessary to replace it, even if it is intact, and clean the seat from oxides.

— The reverse lights do not light up, and when you turn on the ignition or start driving, fuse No. 1 burns out. Most often this happens due to a loose wire from the reverse switch. It is located on the passenger side transmission cover.

— Cigarette lighter fuse No. 6 burns out. The fastening nut in the cigarette lighter has loosened and is shorting to ground.

— The wire has come off the glove box light and shorted to ground. Fuse No. 15

— The fuse for the heater or windshield wipers burns out. The reason is the interturn short circuit of the motor coils. Only replacement or repair will help.

Over a long period of operation, the electrical equipment of the VAZ 2107 has shown itself to be on the good side, except for some “sores” described above.

Timely maintenance, periodic tightening of wire connections, cleaning of contacts, keeping the fuse box clean will help to get rid of unpleasant breakdowns and failure of equipment along the way.

Removing the windshield wiper motor

To repair the windshield wiper motor, it must be removed. To perform this operation, you will need a 10 and 22 open-end or socket wrench. All actions are performed in the following algorithm:

unscrew the wiper fastening nuts using a 10mm wrench;
windshield wipers are dismantled;
unscrew the fastenings of the wiper brackets with a 22mm wrench and remove the plastic inserts;
rubber seals are removed from the engine compartment;
the power terminals are disconnected;
wires are removed from the holes in the body;
the casing on the motor unfolds;
Read also: How to check the ignition coil on a Priora (VAZ 2170): testing methods
unscrew the fastening nuts using a 10mm wrench;
the gearbox is removed together with the brackets;
the trapezoid fastening nuts are unscrewed;
The windshield wiper motor is removed.

Upon completion of the windshield wiper repair, all procedures are performed in reverse order.

Repair of electric wiper motor

As mentioned above, difficult operation of the purifier may be caused by a malfunction of the engine. This is usually due to the fact that the lubricant in the bushings accumulates friction products over time and becomes very thick. The engine rotor begins to spin with difficulty, which leads to burnout of the winding or burnout of the commutator lamellas.

Secondly, when the wipers do not work completely when there is voltage, this is wear on the electric motor brushes. In some cases, with a slight blow to the engine, it began to work.

Below watch a video on replacing the wiper motor:

In cases where the windshield washer does not work, the motor is usually faulty. To check it, measure the voltage on the “+” yellow-black wire, if not, check fuse F2. If there is voltage, then use a piece of wire to connect the “-” black and white wire to the car body. The engine must spin, otherwise it is faulty.

There is nothing difficult in eliminating the described breakdowns. The necessary operations can be performed by any car enthusiast who knows a little about the design.

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

Where does which wire go, or just a diagram

“Plus” power is supplied from the ignition switch through a 10 Amp fuse in the mounting block. The constant “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 the motor with 12 V power 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 designed to brake the motor when the power is turned off by the closer.

what to do if the wipers on a classic don't work!)

The reddish 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 later the cycle repeats.

The washer pump motor is connected to "" 12 V constantly with a black and yellow wire through the same fuse. "Minus" is supplied when the windshield wiper lever is pressed from bottom to top.

The most common windshield wiper failures

If the wipers on your car suddenly stop working, the cause of the problem can be identified by focusing on the following symptoms:

The gearbox operates normally, but the wiper blades do not move. Most likely, the problem lies in worn or broken gear teeth that need to be replaced. Also, sometimes it is enough to tighten the nut holding the special crank mechanism located on the gear to solve the problem.
The wipers don't work at all. In this situation, it is necessary to check the serviceability of the fuse, and if a breakdown is detected, replace the part. In addition, we recommend making sure that the fuse contacts have not oxidized due to exposure to moisture.
The wiper blades do not work intermittently. The most common problem is with the relay, so diagnosing this device first is required.
After turning off, the wipers do not return to the first position, but freeze in an arbitrary position, sometimes blocking the driver’s view. This problem is associated with a gearbox failure. It is quite repairable, but sometimes replacement may still be required.
When the windshield wiper is turned on, the motor does not click and shows no signs of life. This problem occurs due to burnout of the winding or contamination of the contacts. In any case, you need to check the electric motor.

In addition, the windshield wiper may fail due to a malfunctioning switch located, as mentioned earlier, on the steering column.

It can be easily replaced, since this part is inexpensive and easy to install.

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.

Tuning wipers on a VAZ-2107 car

Quite often, a part such as a windshield wiper trapezoid fails, which cannot be repaired and may require frequent replacement. A small improvement will help you solve the problem - installing a frameless device instead of a standard wiper, which has a number of advantages:

spectacular appearance, the ability to make fundamental changes to the design of your car;
the absence of any hinge joints, due to which dirt, snow and excess moisture often accumulate on the body of standard wipers, leading to the most negative consequences;
much better adhesion to glass, which improves the quality of its cleaning.

Both repair and replacement of wipers can be done yourself if you have the appropriate experience, as well as a tool that allows you to dismantle certain components of the windshield wiper.

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.

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!

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:

the relay is removed;
use the switch located near the steering wheel to turn on the wiper switch;
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.

The electric motor of the cleaner does not function

If the electric motor does not work, but there is voltage at its contacts, then the problem is in the device itself. This could be wear on the brushes or failure of the windings. The brushes wear out over time, and the winding fails when the motor is overloaded. These products can be repaired, but for this you need to contact a workshop.

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.

Refinement of wipers

When it rains heavily, the seven's windshield wipers work perfectly (in constant mode). The disadvantage is the fact that during light rain (intermittent mode), the brushes can rub idle, wearing out and scratching the glass. This occurs due to a non-optimal pause between swings. This problem can be solved by modifying the wipers. We will find out further how to modify the wipers on the VAZ-2107.

Modification of the VAZ 2107 wipers consists of changing their operating frequency, or the possibility of its smooth adjustment.

Initially, you need to remove the relay, which is located in the cabin, near the hood opening lever.
It is necessary to remove the relay cover and replace the installed 62 kOhm resistor with another one whose resistance is 30 kOhm. This will reduce the wiper response interval from 4 seconds to 2 seconds.
The resistor is soldered to the board on one side only.
It is necessary to solder wires into the circuit break that will connect to a variable resistance from 100 to 500 kOhm.
Once the wires are soldered, the relay can be assembled and installed in place.
The device in the form of a variable resistor must be placed in a convenient place on the control panel, since it will be used to switch the operation of the brushes.
This connection diagram allows you to select the optimal mode of operation of the windshield wipers in the range from 2 to 10 seconds.

After the circuit is assembled, you can turn on the wipers and check their functioning. The variable resistor looks like a regular regulator, which is shown in the photo below.

There is another simpler way to upgrade windshield wipers that does not require working with a soldering iron. Ready-made relays with pause adjustment are sold on the market. You just need to buy a similar relay and install it instead of the standard one. You can learn more about this in the video below.

Such a simple modification will significantly increase the service life of the brushes, which is also important for drivers. To summarize, it is important to note that repairing windshield wipers is not a difficult process, but in order to repair or find the cause of the breakdown, you must approach the situation wisely. Determine specifically how the wipers do not work, and only then look for the breakdown.

The electric motor of the cleaner does not function

Wiper motor and gearbox

What to do if the wipers on a VAZ-2107 do not work

Not a single car can do without windshield wipers, and the name speaks for itself, because its task is to clean the windshield of the car. If there is snow, rain, or the glass is dirty for one reason or another, it is the wipers who come to the rescue, otherwise the trip will be impossible or very difficult. In this regard, many people ask the question: is it possible to independently understand the cause of the breakdown, change or repair the wipers? And the answer is yes, you can. This is exactly what our article is about today.

There are plenty of malfunctions that cause wipers to not work, and in order to understand what the reason is, you need to know how a windshield wiper works.

electric motor;
fuses;
control relay;
electric washer pump;
brushes;
three-position switch.

Causes of breakdowns
Troubleshooting
How to fix windshield wipers

Causes of breakdowns

Among the most common are:

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

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

The cause of the malfunction is in the windshield wiper motor.
The wiper relay is broken.
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.

Connection diagram

If difficulties arise, this diagram will help you find out what you are doing incorrectly.

wiper gearbox (1);
thermobimetallic fuse (2);
motor (3);
washer valve (3);
mounting block (4);
ignition switch (5) and relay (6);
switch (7);
K3 front wiper relay (8);
“A” – the contacts of the wiper pads are marked;
“B” – output to pin 30 of the generator terminal;
a – 2nd speed;
b – 1st;
c – switch spring;
d and e – his contacts;
noise filtering capacitors – C1, C2;
chokes – L1, L2.

Troubleshooting

The wipers do not turn on. In this situation, most likely the reason is that the fuse has blown, which protects the circuits from excessive loads and short circuits. Therefore, first you need to check it. This is done using a special tester. If you don’t want to check, it’s time to immediately replace it with a new one. The fuse contacts could also have oxidized; it will be enough to clean them and then install them back.
The wipers act up in intermittent mode. Here the breakdown lies precisely in the relay. The verification process is quite simple, you need to apply power to the relay block. To do this you need:

remove the relay;
then use the switch (near the steering wheel) to turn on the wipers;
then the tester checks whether there is voltage in the terminal.

The switch will have to be replaced if there is no power. The control circuit could also have broken; this option should also be excluded. The relay cannot be repaired, so even if there is power, but it does not work, it needs to be changed.

If the reason is in the electric motor of the cleaner. When there is voltage at the contacts of the electric motor, but the motor itself is “silent,” it means that the problem lies in a malfunction of the device itself. The windings could have failed or the brushes may have worn out. The former break if the motor is overloaded, while the latter simply wear out over time. In this case, repairs yourself are impossible, and you should contact a car repair shop.
The wipers freeze. Quite often in domestic cars (and the VAZ 2107 is no exception) you may encounter the fact that when they are turned off, the wipers do not occupy the required initial position, but remain where they were at the time they were turned off. The problem in this case lies precisely in the drive gearbox. It has a limit switch and is actuated by a cam. And the job of the cam, in turn, is precisely to control where the brushes will be after the power stops being supplied to the switch lever. A malfunction in this option in most cases occurs when the driver turns on the wipers that are frozen to the glass. As a result, the gearbox breaks down and needs to be replaced.

Main causes of malfunction and ways to eliminate them

Often, the reason for the malfunction of the windshield wiper is absolutely trivial - debris or foreign objects, such as screwdrivers, keys, bolts and other equipment, which Zhiguli owners love to store in a niche in the engine compartment, have gotten under the rods coming from the electric motor. Carefully feel the area near the wiper motor and remove any excess. If you find an object that interferes with the movement of the rods and remove it, but the wipers still do not start working, then the motor winding may have been damaged due to the resulting load.

There are times when the wipers stop working in both cases. Then the driver should independently check the fuse, which is located in the mounting block . It protects the circuit from overloads and can burn out at one point. If the fuse is OK, check to see if the contacts on which the fuse is installed have oxidized. If you see oxidized contacts, simply remove the fuse several times and install it back.

How to fix windshield wipers

The wipers on the VAZ-2107 work great in pouring rain, but when it’s drizzling outside, for example, they can be said to run idle and, as a result, wear out more quickly. The problem can be solved - you just need to “modify” the wipers. And it lies in the fact that it is necessary to change the frequency of their strokes or make its adjustment smoother.

You have to remove the relay near the lever that opens the hood.
Then the relay cover is removed and the previously installed resistor is changed. If, for example, the original resistor is 60 kOhm, then it makes sense to replace it with 30 kOhm. In this way, you can reduce the interval of wiper sweeps by half.
Next, the new resistor must be soldered to the board on one side.
There is a gap in the circuit where you need to solder wires, the task of which is to connect to a variable resistance.
Now the relay can be assembled and installed in its original position.
It is recommended to install the resistor in the dashboard so that it is convenient to use, since it is with its help that the brushes are now switched.
Using this connection, it is possible to independently select the operating mode of the wipers. The range is from two to ten seconds.
Upon completion of assembly and installation, you need to turn on the windshield wipers and check their operation.

There is also another, simpler way to improve it. Purchase a ready-made relay with adjustment. Replacement occurs in the same way as the previous method.

In conclusion, we can say that, as you have seen for yourself, replacing and repairing brushes is not a difficult task, you just need to know how wipers should work and take the matter seriously. First check what the problem is, and only then look for the cause of the problem.