How to make a windshield wiper relay with adjustable pause

Very often, weather conditions on the road develop in such a way (for example, with light drizzle) that there is a need for intermittent operation of the windshield wiper blades. In such situations, many motorists understand how convenient it is to have a windshield wiper relay with an adjustable pause on their car. Thanks to this design, driving comfort is significantly improved. We will talk about the need for such a relay, how to use it and whether it can be installed on your car if it doesn’t already exist in this article.

Why do you need to adjust pauses?

A regular windshield wiper is usually indispensable in rainy weather, but this is only if the rain is relatively heavy and not light. In drizzling rain, the standard performance of the wiper is not very satisfactory, to put it mildly. I mean those cases when intermittent mode is enabled. It just so happens that every factory wiper has a standard pause between periods of its activity. This pause is usually four seconds. In the event of light rain, the windshield simply does not have time to become wet and, as a result, the brushes pass over a dry surface, which is often irritating and causes the subsequent appearance of streaks.

In this case, you have to get out of it by regularly turning off/on the wipers every twenty seconds. This clearly interferes with driving as the driver becomes more and more irritated over such a seemingly insignificant problem. In general, the complexity of the necessary work to change such a temporary indicator is not very high, which already eliminates the high probability of negative consequences due to intervention on the part of the driver.

Typical glass cleaner malfunctions

Malfunctions in the operation of the windshield wiper may be associated with a breakdown of the gear motor, relay, switch, as well as wear or deformation of mechanical parts. The most common problems that arise are:

• the electric motor does not turn on (the characteristic noise accompanying its operation is not heard);
• the operation of the electric motor stops due to the fuse tripping;
• the engine does not go into intermittent or wash mode;
• in intermittent mode, the brushes move without stopping;
• pendulum arms and brushes do not move when the gearmotor is running;
• wipers move too slowly, with difficulty;
• brushes do not return to their original position;
• The brushes move, but the cleaning is unsatisfactory.

Installation process

The windshield wiper relay with adjustable pause is easy to install yourself. To do this, you need to find the brush block and open the cover on it. There used to be an old relay here. Ideally, the new control unit has been modified and can be easily installed in an existing mounting location.

After this, you need to configure the system. After installing all elements of the system in the reverse order, it is necessary to turn on the intermittent wiper movement mode. In this case, the pause will last the standard amount of time. Next, you can set your settings.

To do this, the driver must turn off the brushes. After this, it maintains the required time interval. For example, it will be 2 seconds. Then the driver switches on the intermittent brush movement mode again. In this case, the relay will remember how often you need to sweep the wipers. This is a very convenient way to control the movement of the brushes.

Modernization of windshield wipers. Automatic windshield wiper.

V. Lomanovich, A. Kuzminsky

Windshield wipers installed on some modern cars operate continuously. However, it is rational to equip the windshield wiper with an appropriate automatic device that ensures that it is periodically turned on and off according to a given program. In Fig. Figure 1 shows a diagram of an electronic device for automatically turning on the windshield wiper at a specified frequency.

Rice. 1. Schematic diagram of devices for automatically turning on the windshield wiper

The multivibrator on transistors T1 and T2 generates rectangular pulses, which are fed to the base of transistor T3, in the collector circuit of which the electromagnetic relay P1 is connected. The duration of the pulses arriving at the input of transistor T3 varies from 1 to 30 s depending on the position of the variable resistor R2 slider, and the operating period of relay P1 changes accordingly. Normally closed contacts 1P1 and 2P1 of relay P1 are connected in parallel and are used to control the windshield wiper motor.

When connecting an electronic machine to a standard windshield wiper, you need to disconnect clamp “3” from the chassis so that in the future contacts 1P1 and 2P1 of relay P1 (see Fig. 1) can be connected to point “3” and the chassis (common minus). At the same time, it remains possible to operate the windshield wiper in normal (non-automatic) mode.

After applying voltage to the electronic device, relay P1 is activated and contacts 1P1 and 2P1 break the power supply circuit of the windshield wiper motor 0.3-0.5 s after the closure of toggle switch B1. The time during which the electric motor is turned off depends on the duration of the control pulses arriving at the base of transistor T3 from the multivibrator (see Fig. 1).

After the pause ends, the contacts of relay P1 close and the windshield wiper starts working. Using variable resistor R2, the duration of pauses can be changed. Just as in continuous operation, the auto-stop switches off the electric motor only after the wiper blades have returned to their original position on the windshield.

Note that the electronic automatic machine allows you to use the windshield wiper in any of the continuous operation modes (with low or high speed of movement of the brushes). In the event of a failure of the electronic unit, the windshield wiper remains operational in normal mode.

Instead of variable resistor R2, you can install a small-sized switch with 2-5 operating positions (for example, a PKM cam switch), which switches several constant resistors. Their resistance is selected in such a way as to obtain the desired duration of the pause between switching on the wiper motor.

In Fig. Figure 2 shows a diagram of the installation of the electronic unit on the Moskvich car.

Rice. 2. Installation diagram of the electronic unit on the Moskvich car

The selection of the windshield wiper operating program is carried out using a multi-pole cam switch with five positions, type PKM9-1 (B1-B9), which is installed on the driver’s panel. Initially, as shown in Fig. 2, all contacts of PKM9-1 are open, its handle is in the first position and the windshield wiper does not work. In the second position of the switch, switch B1 closes and the windshield wiper begins to operate in continuous mode with the blades slowly moving across the windshield. In the third position of PKM9-1, in addition to B1, switches B2 and B3 are closed. The additional resistance Rd of the excitation winding circuit OB2 of the electric motor is short-circuited, and the windshield wiper is switched to the second continuous mode with accelerated movement of the brushes. In the fourth position of the PKM9-1 switch, switches B1, B2 and VZ are opened, and B4, B6, B8 are closed. In this case, power is supplied to the electronic unit and the first automatic mode is set with pauses of 5 seconds between switching on the wiper motor. In the fifth position of PKM9-1, the second automatic mode is set with pauses of 10 s between switching on the windshield wiper (B4, B6 and B8 are open, B5, B7 and B9 are closed).

How to add pause adjustment to a relay

First of all, in order to be able to regulate the duration of the corresponding pause, it is necessary to remove the wiper relay itself from the car. I think finding it will not be a very difficult task, since every wiper of any car model is always located on the windshield, where it fulfills its purpose. To be more precise, the relay is screwed to the body not far from the hood release handle. And so we unscrew the relay, as well as the column, and take our part home or to any other convenient place where you will feel comfortable doing the rest of the work.

Now, so that the windshield wiper interrupter with pause adjustment can be calibrated, open the cover of the removed part and remove the printed circuit board that is attached to it on the other side. Now we carefully consider the diagram.

Let me remind you that the pause between sweeps of the wipers is provided by a resistor. Without proper handling, the windshield cleaning system will not work.

It is thanks to the change in resistance that adjusting the wiper pause becomes quite possible. If there is an interval of four seconds between sweeps of the wiper, then the resistor resistance is 62 Kom. For example, a value of 45 Kom provides a delay of three seconds. If you put a resistor with a resistance of approximately 30 Kom on the windshield wiper pause relay, the interval will be only two seconds.

If you decide to leave the original resistor, then I advise you to prepare to solder any of its legs of your choice from the same board. In case of replacement with a resistor with a lower value, the original one should be soldered with only one leg. Then we take about fifty centimeters of a pair of single-core wires or one two-core wire and solder one wire to the free leg of the resistor, and the second to the place where you just soldered the free leg.

It is advisable that the wires be wrapped in a special transparent heat-shrinkable casing, as it guarantees excellent insulation. We put the tube on the connection itself and barely heat it with a lighter, which will make it shrink and settle tightly. This method is much more effective than electrical tape. We are not finished with the windshield wiper pause relay yet, although both wires are already soldered. Now we make a knot on them so that we don’t accidentally tear them off due to carelessness and cover the relay cover, simultaneously pulling these wires along with the standard ones. Don’t forget to glue the cover of the wiper pause relay itself, for example, with a hot glue gun.

After this, we pick up a variable-type resistor with an arbitrary resistance value (for example, 100 Kom). If you want to extend the pause between sweeps of the wipers, then I advise you to choose a resistor with a value of more than 100 Kom. The higher its resistance, the longer the pause. 100 Kom means an interval of ten seconds, and 200 Kom means seventeen and so on. I strongly do not recommend choosing a resistance of 500 Kom, since the accuracy of setting the pause will be significantly reduced.

We take this variable resistor and any of the two wires to solder it to the central contact, and solder the second wire to any extreme contact of your choice. That's it, job done.

Now we take the modified relay, install it back on the car, and it is advisable to place the resistor closer to the windshield wiper switch, for example, on the steering column. You can arrange the mechanism of use entirely at your own discretion. There are no longer any boundaries in this matter.

As you can see, adapting the wiper interval to your understanding of comfort is not very difficult. And the cost of brand new relays and resistors is not very high. However, it is definitely worth your time, and the windshield wipers will no longer bother you with their too short activity interval in light rain.

Repair

To troubleshoot problems with the wipers on your VAZ 2109, it is not at all necessary to contact a service station. The work can be done with your own hands, saving a decent amount of money.

Repair consists of performing several operations:

• Disassembling the unit;
• Troubleshooting;
• Eliminating the causes of purifier failures;
• Reassembly.

Dismantling

The first step is to learn how to remove windshield wipers. This will give you access to the device and all its components.

Dismantling by a wiper is carried out for their repair, replacement, modernization or when working with other components of your car.

It is enough to follow the specified sequence of actions and first familiarize yourself with the wiper diagram in order to do everything correctly.

Scheme

1. First, disconnect the negative terminal of the battery to de-energize the car.
2. Remove the brush arms by moving them to a vertical position and unscrewing the fastening nuts. Unscrew the nuts carefully so as not to push the lever out. Otherwise, under the action of the spring, it will fly into the glass and break it.
3. By unscrewing the fasteners, the levers can be removed. It is not always possible to do this manually, so arm yourself with pliers. Be careful not to damage the threaded area. To avoid this, screw the nut back onto the splines, but not completely.
4. Remove the protective caps made of plastic from the slots on each side.
5. Unscrew the upper mounting nuts with the bracket and remove them. Under them there are rubber washers, which are also dismantled.
6. Lift the hood and disconnect the wiring harness that powers the wiper motor.

1. Unscrew the heater fan mounting screws and move it slightly to the side. This way, when dismantling the purifier, it will not interfere with you.
2. Remove the cover from the relay and fuse box. You need to remove not only the wiper relay, but also everything else. Otherwise, they will interfere with your further processes.
3. Unscrew the lower fastening nut of the mechanism, remove the plastic holder of the wiring harness from the electric motor from the hole in the car body. Now you can remove the holder so that it does not get lost during the repair.
4. All that remains is to push the mechanism roller inside, then lift the electric motor and the windshield wiper mechanism slightly up and to the side. This way you can easily remove the node.

Beginning of work

To install a windshield wiper relay with an adjustable pause with your own hands, you must first dismantle the wipers. Their design may vary significantly depending on the vehicle model. It is also worth noting that the brushes can be front or rear. However, regardless of their type, the relay is located on the vehicle glass.

If there is no wiring diagram for the wipers, you can find the installation location of the control unit yourself. To do this, you need to inspect the base of the brushes. Most often, in foreign and domestic cars, this element is screwed to the car body.

Most often, the relay is located near the hood release handle. When the part is found, it is dismantled. To do this you need to prepare a simple screwdriver. The old relay is removed very carefully. You must try not to scratch the body or damage other elements of the system. You also need to remove the wiper column.

Rear window wipers

Malfunctions in the operation of rear window wipers are usually associated with the steering column switch, gear motor, power wires, broken drive teeth, and worn brushes. The relay does not affect the operation of the rear wipers, so its malfunction can be ruled out. The methods for eliminating other breakdowns are the same as for the front wipers.

Repair of windshield wipers mainly comes down to replacing damaged components, cleaning electric motor parts, cleaning and lubricating moving joints, and straightening deformed levers. Repair costs are low, and using contract spare parts from JapZap will keep them to a minimum. The procedure for dismantling and installing different components of this assembly may differ in different cars, but the general principles for troubleshooting are the same.

Standard relays

Standard windshield wiper relays with an adjustable pause for VAZ, UAZ and other car brands have two operating modes. In the first, the brushes swing without pause. This mode is suitable if there is heavy rain. The second mode has a pause between swings. By default it is 4 seconds.

This situation sometimes makes it difficult to select the optimal mode for eliminating drops from the windshield. Many modern car models provide adjustments with the ability to set the time between brush strokes. However, relatively inexpensive vehicle models do not have this option.

In this case, the driver is forced to either put up with this brush flapping mode or turn it on manually. In this case, literally every 20 s. you have to use the windshield wipers and then turn them off again. This allows for normal visibility. However, manually turning on the wipers can distract the driver. This action may lead to an accident. Therefore, it is recommended to retrofit your vehicle with a more modern relay design.

Features of the device and wiper circuit

The glass cleaning system consists of the following elements:

1. Electric motor or wiper drive. This device ensures the normal operation of the system by facilitating the movement of the wipers along the front and rear (for station wagons and hatchbacks) glass. If the windshield wiper gearbox fails, it will cause the wipers to not work. The rear wiper drive is also installed only in hatchback or station wagon vehicles.
2. The windshield wiper blade holder, also known as the windshield wiper arm, is also known as the windshield wiper arm - brush holder. The wiper blade itself is fixed to this device and moves along the glass.
3. Brush with a rubber or silicone blade. When it wears out, the quality of cleaning the windshield is significantly reduced.
4. The fastening of the windshield wiper blades is a structural element of the wipers themselves.
5. Expansion tank - liquid is poured into it, which is subsequently transferred to the glass through nozzles through hoses when the wipers are turned on.
6. Nozzles - these elements are mounted on the hood, they perform the function of spraying water onto the glass.
7. Rubber hoses connecting the expansion tank and injectors - consumables are transferred through them.
8. Depending on the car, it may use a windshield wiper control unit or a windshield wiper breaker. The latter is a relay that, in accordance with the actions of the driver, determines the frequency of movement of the brushes at specified time intervals. As for the block, it allows the driver to independently set the required interval.
9. The washer motor, which supplies water or washer fluid to the windows.
10. Windshield wiper switch. The steering column switch is located inside the car, under the steering wheel. With its help, the driver can set the speed of the wipers, and also, if necessary, supply water to the glass.
11. A rod that connects two brushes. Thanks to it, these elements can move synchronously.

Photo gallery “System elements”

Advantages

It is worth ordering a windshield wiper relay with an adjustable pause for several reasons. This re-equipment of the design allows you to get a lot of advantages. The comfortable brush sweep mode allows for good visibility on the road in any weather. Regardless of the intensity of precipitation, cleaning will be carried out in the most suitable mode.

If the pause when flapping the brushes is even 0.5 seconds, this will significantly increase the service life of the wipers and their rubber elements. The frictional force will have less impact on the material. At the same time, in the process of cleaning glass using a jet of water, it will be possible to avoid the movement of the brushes on a dry surface. This also significantly extends the life of the brushes.

At the same time, purchasing an additional relay will not require large financial costs. If you wish, you can install this control unit yourself. This does not require much effort and time. A simple procedure will help increase comfort when driving a car in bad weather.

Benefits of adjustment

An adjustable wiper relay has a number of advantages over standard designs. First of all, it should be noted that you can set the pause duration in the range from 0.5 to 45 seconds. This allows you to configure a mode that is optimally suited to weather conditions. When applying water to the windshield, a pause of even 0.5 seconds can prevent dry friction of the brushes on the glass. This allows you to avoid premature wear.

Also, installing an adjustable relay allows you to automatically supply water to the glass with only 3 strokes, and not 4, as with the standard setting. This makes it possible to avoid the last stroke on dry glass. At the same time, the adjustable system will make 4 strokes of the brushes if the driver holds down the water supply. The use of the presented system significantly increases driving comfort in wet weather, and also prevents rapid wear of the rubber wiper blades.

Features of relay replacement

Before making a replacement, you need to consider the technology for carrying out this work. It is advisable to study the manufacturer's instructions. It indicates how the wiper control system works.

In some models this procedure is simpler. Many foreign-made cars have a system modification feature. The fact is that vehicles are supplied to the market with both full and cheaper equipment. In the second option, the manufacturer initially assumes that the driver can carry out modifications if desired.

If an additional control unit is installed on a similar foreign car and a domestic car, the procedure will be different. The windshield wiper relay with an adjustable pause for Grant, Priora, and VAZ is somewhat more difficult to install. However, when purchasing a modified used part, this procedure is greatly simplified.

Signs of trouble

In practice, it is not so difficult to determine that the intermittent operation of your car wipers has eventually disappeared. No diagnostic equipment is needed, just your eyes.

Here you need to look at the behavior of the wiper blades installed on the car. In fact, there may be 2 scenarios. They either do not stop for the required 2-3 seconds, or do not react at all to commands from the car’s interior.

The situation is especially unpleasant when everything works in other positions of the switch. Although everything is individual here. Sometimes it’s better for the brushes to work somehow, because otherwise you won’t be able to get home during a rainstorm or heavy snowfall.

When faced with the fact that the intermittent wiper mode on your car does not work, you need to find out the reason and try to fix it yourself. Or seek professional help.

Refinement of the system

If you want to replace the rear wiper relay or windshield blades, the driver has the opportunity to modify the part himself. To do this, you need to have basic knowledge about the structure of electrical appliances. To perform calibration, you must remove the housing cover. Next, the printed circuit board is dismantled. The pause between swings depends on the type of resistor. Having carefully examined the diagram, it will be easy to find it. In standard models (pause 4 seconds) this element has a resistance of 62 Kom. If you reduce it to 45 Kohm, the pause between brush strokes will be 3 seconds.

To extend the pause to 10 seconds, you should purchase a resistor with a resistance of 100 Kom. If the driver wants to make an interval between brush strokes of 17 seconds, a resistor with a nominal value of 200 Kom can be installed in the circuit. It is not advisable to use devices with a resistance of 500 Kom. This will significantly reduce the accuracy of the interval.

Revision procedure

The old resistor needs to be removed from one side. One wire is soldered to its free leg. The second core must be connected to the place where it was installed. The wire can be used one two-core or two single-core. The second end is connected to the central contact.

Next, the relay cover can be closed and the device installed in the system. Its functionality is checked.

Having looked at how to select and install a variable pause wiper relay, you can perform this procedure yourself.

Performing revisions

The windshield wiper relay is modified by installing a new resistor. You will also need about 50 cm of single-core or one double-core wire. It is soldered to the extreme contact of the resistor. The old resistance element must be desoldered on one side only. One wire is soldered to its freed leg, and the second is connected to the place where it was installed before.

The second end must be connected to the central contact. The wires must be covered in a cambric made of transparent material. Next, you need to make a knot on the wires so as not to accidentally tear them off. The relay cover can be closed. The part is mounted in its original place. Having considered what a windshield wiper relay is, every driver will be able to use it for the wipers of his car.

Capabilities of modern relays

Today, many manufacturers produce modern windshield wiper relays with an adjustable pause on the Chevrolet Niva, VAZ, Lada-Kalina and other types of vehicle models. For each car, certain systems have been developed that allow you to properly adjust the operation of the wipers.

When installing such a device on his vehicle, the driver has the opportunity to adjust the brush strokes at intervals from 0.5 to 45 seconds. This function allows you to select the most comfortable mode that matches the existing weather conditions.

In this case, you can configure not only the movement of the wipers when driving along the highway in bad weather, but also during the glass cleaning mode. If water is supplied to it, the standard control unit will make 4 strokes of the brushes. The last of them will be done on almost dry glass. If there is an adjustable relay, there will be only 3 strokes. This will prevent the rubber elements of the brushes from sliding on a dry surface.

conclusions

In our opinion, the ability to adjust the pause between strokes of the windshield wiper blades depending on the driving situation is not just a whim. This directly affects traffic safety. It’s not for nothing that almost all modern cars are equipped with this useful feature. If your car does not have such a relay, we advise you to try to select a ready-made solution from the modified windshield wiper relays offered on the auto parts market with the ability to set the required pause. Everyone who has modified their car in this way is usually satisfied with the result.

Found an inaccuracy in the article? Do you have anything to add? Please write to us about it in the comments.

Where to begin?

To replace a standard part with an upgraded version, you need to consider where the windshield wiper relay is located. It should be noted that in some new foreign cars this function is installed at the production stage of the vehicle. However, cheaper types of equipment may have a standard set of parts. To change an old windshield wiper, you need to pay attention to the design of the wipers. Regardless of the car model and the type of wipers (front or rear versions), the relay is installed directly on the car glass.

To be able to dismantle the old part, you need to inspect the base of the device and find where the windshield wiper relay is located. During factory assembly, it is screwed to the body. The part is located near the hood release handle. Dismantling is done using a screwdriver. You will also need to remove the column.

Features of the improvement

You don’t have to buy a windshield wiper relay with an adjustable pause, but simply modify it. This is a rather complicated process. It requires appropriate preparation from the master. You will need to have at least a basic level of soldering techniques and knowledge of electronics. It is for this reason that it is easier to buy a new device.

However, if you wish, you can carry out the modification yourself. To do this, you need to remove the cover and remove the board. The interval between strokes is controlled by a resistor. It is quite easy to find for a person who understands electronics. To create a pause of 4 seconds, the relay includes a 62 KOhm resistor. If you decrease this value, you can reduce the interval between strokes.

How does a windshield wiper work in cyclic mode?

The windshield wiper is functional when the wiper blades make one movement within 10 seconds, which of course makes driving a car much easier during drizzling and heavy rain. This mode is available for any car; to do this, it is enough to use the PC514 relay from a VAZ car.

Windshield wiper relay wiring diagram. How does the windshield wiper relay work?

1 – relay RS 514; 2 – two-pole toggle switch; 3 – wire; 4 – windshield wiper; 5 – windshield wiper limit switch; terminal designations; Zh – yellow; B – white; K – red; C – blue.

Relay 1 has 4 pins. The plus of the on-board network is transmitted to the yellow wire, the two-pole toggle switch is connected to the red and blue wires. In order to ensure that the wiper blades stop, the non-grounded contact must be connected to wire 3.

In this case , the wiper will operate in cyclic mode when the toggle switch is moved down. Although you can buy a special windshield wiper cycle regulator, with which you can select the cycle of operation from 2 to 15 seconds.

Relay functions

The windshield wiper relay with an adjustable pause for UAZ, VAZ, Chevrolet, Kia and other car brands differs in functionality and design. It should be noted that the presented part is available in almost every vehicle. However, its functionality is significantly different.

When it rains, snow or other precipitation, their intensity may vary. During heavy rain, it is necessary that the brushes make frequent strokes, providing a clear view of the road. But in drizzling rain or light snow this is not required. The brushes should occasionally remove grains from the windshield.

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If the model of the frequency regulator does not provide for long pauses in movement, this may cause discomfort. Many drivers have encountered a situation where the blades, often moving across the windshield, simply smear the occasional drops of rain. At the same time, divorces remain. They impair visibility. This is an unsafe factor when driving.

The principle of operation of the drive, engine and other mechanism components

If the circuit and design of the windshield wiper do not raise any questions, let’s move on to the next point - the principle of operation. The windshield wiper holder, together with the blade mounted on it, moves left and right, which allows you to almost completely clean the windshield. As stated above, using the switch, the driver can adjust the speed at which the wiper blade holder will move. Some modern cars are equipped with hidden cleaners. In this case, the windshield wiper mechanism is installed under the windshield, and when the driver needs to turn on the wipers, the device pushes up this mechanism, which, after being turned off, “hides” back.

In general, windshield and rear window cleaners are almost identical products, but there are differences in their operation. For example, the windshield wiper blade holder can only operate in one mode, without the possibility of adjustment. That is, if the front wipers are part of a whole system that includes many elements and a control unit, then the rear wiper has only one function. One of the main components of the washer is a pump designed to activate the system’s electric motor.

New and used devices

If you want to purchase a windshield wiper relay (VAZ, IZH and some foreign cars), it is not necessary to purchase new parts. A wide selection of high-quality models of regulators is presented among used devices. Therefore, if desired, such devices can be installed on windshield wipers.

On the secondary market, according to experts, you can select various options for ready-made mechanisms. Their advantage is the presence of modified design elements. This allows you to install the relay in its original location without additional modifications to the wiring or steering column switches. Such parts are designed more for domestic cars. Therefore, owners of foreign cars must purchase new relays and carry out the required modifications to the system themselves.

Device selection

If you want to replace a standard part with a new brush control device, you should study the rules for choosing such devices. The most popular today are the windshield wiper relays for VAZ-2107, 2109, 2114, IZH-2126 and other domestic cars models 54.3777 and 723.3777-01. The first device is produced by Russian Partner LLC, and the second by Energomash CJSC. The cost of the presented devices is about 150-170 rubles.

The designs shown are suitable for vehicles with a new fuse box. However, this is not possible in all models. For domestically produced cars with an old fuse block, a relay model 39.3777-03 (“Russian partner”) has been developed. For foreign cars with a new contact block, you should purchase model 723.3777-05 (Energomash). To correctly select the presented design element, it is better to consult with an experienced specialist.

New relay

A windshield wiper relay with an adjustable pause for VAZ-2107, IZH, Lada Granta and other car models must be selected correctly. There are several popular manufacturers of the presented equipment, whose products are in great demand today.

For domestic cars with a new safety block, as well as foreign cars with the same arrangement of structural elements, the most popular model is 723.3777-05. This relay is produced by Energomash CJSC. The cost of such a device is about 200 rubles.

It should be said that there are many cars driving on domestic roads whose safety unit has an old configuration. For such vehicles, the most popular models are 724.3777-01 and 39.3777-03. The first design is produced by ZAO Energomash, and the second is produced by the no less popular brand “Russian Partner”. The cost of such products is also in the range of 170-200 rubles.

Windshield wiper relay with adjustable pause

Very often, weather conditions on the road develop in such a way (for example, with light drizzle) that there is a need for intermittent operation of the windshield wiper blades.

In such situations, many motorists understand how convenient it is to have a windshield wiper relay with an adjustable pause on their car. Thanks to this design, driving comfort is significantly improved.

We will talk about the need for such a relay, how to use it and whether it can be installed on your car if it doesn’t already exist in this article.

What is the advantage of a relay with an adjustable pause

As a rule, all modern cars have at least 2 operating modes for windshield wipers: intermittent (that is, with a pause between sweeps of the blades) and constant.

Have you ever encountered a situation where, during light drizzling rain, when the windshield wipers operate in the “pause” mode, this pause is too short and the wipers “scrape” on the windshield that has not yet gotten wet? I think most drivers have found themselves in similar situations.

If your car does not have the ability to adjust the pause in the operation of the brushes, there are only two ways to solve the above problem.

The first is to turn the wipers on and off as needed, but this distracts the driver from driving and creates additional risks for safe driving, especially if the trip is long. The second way is to leave everything as is, that is, to accept the movement of the brushes on dry glass, but this, firstly, leads to increased wear of the wiper cleaning tape, and secondly, it can irritate the driver.

A windshield wiper relay with an adjustable pause allows, by maintaining the required pause between sweeps of the wipers, to easily and most effectively solve the above problem, making travel in light rain conditions more comfortable.

There are two types of such relays:

• with several preset intervals between strokes (for example: 1, 2,4,8, 10 seconds, the driver can only choose the interval most suitable for current conditions;
• with the ability to set any required interval, i.e. Based on current conditions, the driver can set almost any interval using a certain algorithm.

How to install a variable pause wiper relay

Having appreciated all the advantages of a relay with pause adjustment, many motorists are wondering how to install it on their car and is it even possible? There are three ways to add this feature if your vehicle doesn't have it.

Selection of necessary parts from the same machine, but in a more “rich” configuration

Often on foreign cars in the simplest equipment there is no windshield wiper pause adjustment, but this function appears in other equipment. Most often, it is enough to change the windshield wiper relay and steering column switch, and not necessarily with new ones. You can pick up the necessary parts at a dismantling shop.

Replacing an installed relay with a relay with an adjustable pause

On the secondary market, there are quite a lot of ready-made solutions for replacing the standard windshield wiper relay, modified, with the ability to set a pause between sweeps of the blades within a fairly wide range (for example, from 0.5 to 45 seconds).

Moreover, the advantages of this solution include the fact that the installation of such a relay is carried out in a standard place and does not require modification of the wiring or alteration of the steering column switches.

True, most often such offers are designed for domestic cars.

Here are several options for such relays indicating their applicability and part numbers:

Manufactured by Russian Partner LLC

How to install a variable pause wiper relay

1. RELAY 39.3777-03 is suitable for VAZ 2110, 2111, 2112 cars; VAZ 2108, 2109 (with the “old!” fuse block); VAZ 2123 Chevy-Niva; AZLK 2141, Svyatogor; IZH 2126 (ODA) with “old!” fuse box; UAZ 3160.
2. RELAY 54.3777 is suitable for VAZ 2113, 2114, 2115; VAZ 2108, 2109 with “new!” fuse box (blade type fuses); VAZ 1117, 1118, 1119 (Kalina); VAZ 2170, 2171, 2172 (Priora); GAZ 3111; IZH 2126 (ODA) with “new!” fuse block. In addition, relay 54.3777 is suitable for some foreign cars, as it has a “European” arrangement of contacts. The possibility of using a relay depends on the specific car model.
3. RELAY 39.3777-02 for GAS cars: GAZELLE; BARGUZIN; SABLE; GAZ 31105; UAZ 31514 and 31519 since 1998;

Manufactured by Energomash CJSC

Windshield wiper relay with adjustable pause manufactured by Energomash CJSC

1. 72.3777-01 For cars “Gazelle”, “Sable”;
2. 721.3777-01 For Volga cars 3102, 3110;
3. 722.3777-02 For VAZ-2101, -2102, -2103, -2104, -2105, -2106, -2107, Niva cars
4. 723.3777-01 For cars VAZ-2108, -2109, -2113, -2114, -2115, -11183 (Lada-Kalina), IZH 2126;
5. 723.3777-05 with rain sensor For VAZ-2113, -2114, -2115, -2170, Lada Kalina. GAZ 3111; VAZ-2108, -2109, -2110, IZH 2126 (with a new fuse block); foreign cars (with a similar arrangement of relay contacts);
6. 724.3777-01 For cars VAZ-2108, -2109, -2110, IZH 2126 (old fuse box), AZLK 2141, UAZ 3160, Niva Chevrolet

Sources

• https://mineavto.ru/remont/elektrooborudovanie/regulirovka-pauzy-stekloochistitelej-1800.html
• https://FB.ru/article/362887/novoe-rele-stekloochistitelya-s-reguliruemoy-pauzoy
• https://fintaxi.ru/kak-podklyuchit-rele-stekloochistitelya-s-reguliruemoy-pauzoy/
• https://ptbnn.ru/drugoe/rele-stekloochistitelya-vaz.html
• https://www.syl.ru/article/302053/rele-stekloochistiteley-s-reguliruemoy-pauzoy
• https://remontomore.com/ustanovka/dorabotka-rele-stekloochistitelya-menyaem-kolichestvo-vzmahov-dvornikov.html

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Trouble-shooting

Poor quality of glass cleaning is usually associated with wear of the cleaning tape, as well as contamination of the hinges in the frame brushes and limited mobility of the rocker arms. The easiest way to solve this problem is:

• In frame brushes, the cleaning tape is changed. The brushes must first be dismantled, the worn element removed, a new one installed in its place, secured with steel plates and the brush secured to the lever.
• Frameless brushes are replaced entirely.

Sometimes the tape is in good condition, but the brushes leave streaks because the grooves that hold the tape are clogged. In this case, they should simply be cleaned. If the metal frame is covered with rust and the rocker arms have lost their mobility, it is better to replace the brushes entirely.

Cleaning tape is inexpensive, but some motorists are in no hurry to change it. You can restore the elasticity of the tape by dipping it in gasoline and washing it with a warm soapy solution; after this procedure, it is useful to coat the tape with silicone grease. Traces of grease are easily removed with white spirit. A worn, rounded edge can be smoothed out using fine-grit sandpaper glued to a hard base.

Slow movement of the wipers may be due to:

• With wear of the gear motor. It must be disassembled, cleaned, lubricated, and if critical wear occurs, replaced.
• With corrosion, contamination, insufficient lubrication of moving joints. The entire mechanical part is dismantled, disassembled, cleaned, and lubricated.
• With an error made during the installation process that needs to be identified and corrected.

Incorrect assembly can also cause the wipers to not return to the park position. Another reason for this problem is wear or breakage of the drive splines, in which case they need to be replaced.

Problems in the operation of the electric motor can be associated with both its breakdown and mechanical problems. If the gearmotor itself is damaged, it is best to replace it entirely. But if the problem can be fixed by replacing the damaged gear, cleaning the dirty manifold, and adjusting the limit switch, replacement can be avoided.

If the engine does not turn on, you need to inspect the power wires, winding wires, commutator, brushes, as well as the steering column switch, which includes a wiper switch.

• Damaged power wires are replaced with intact ones, oxidized tips are cleaned.
• A failed switch is replaced.
• A dirty collector can be cleaned, the internal cavities can be blown out and the surface can be sanded.
• If the collector burns out, it is better to replace the gearmotor.
• Replacing the gearmotor is also recommended if the winding wires are broken, although only the armature can be replaced.

The engine shutdown due to the fuse tripping may be caused by a short circuit in the winding; in this case, the gearmotor must be replaced. But quite often, an emergency shutdown is associated with the locking of the brushes due to their freezing to the glass, deformation of the levers, or the entry of a foreign object into the mechanism. In this case, the cause must be eliminated. Frozen brushes are carefully separated from the glass using a scraper so as not to damage the cleaning edge, but it is better to wait until it thaws. The mechanism is cleaned of dirt and foreign objects that hinder its operation. Deformed drive elements are leveled, and if the deformation is severe, they are replaced with new ones. After eliminating the cause of the fuse tripping, the blown disposable fuse is replaced with a new one, and the thermobimetallic fuse can be used again.

Intermittent purifier problems are most often caused by a damaged relay or switch. If the brushes move intermittently without pauses, and everything is in order with the relay, the limit switch may not operate. In this case, you need to adjust it, bend the contacts or the spring plate, which the gear cam bends. It is also possible that the limit switch contacts are dirty and need cleaning.

When the brushes do not move when the engine is running, the problem lies in the gear motor gear; it is necessary to inspect the gear itself and the crank on its axis:

• if the gear teeth are broken, it needs to be replaced;
• If the crank fastening is loose, you need to tighten the nut to the limit.