The current in the car is served from the plus through the ignition lock, as well as through fuses. Then the voltage passes to the heater switch and the minus battery connects to the car body. One of the wires of glass heating system is also connected to the body.
When the driver presses the power on the system, the voltage comes on the relay. It is triggered, force contacts are closed. The current falls on the heaters, passes through the heating threads and then through the body goes to the battery.
Device of heating element
The heating element has the following device. Bocames on the rear window are conductive tires. They are attached special threads from high resistance materials. Resistance to each thread is 10 ohms.
Their number depends on the size of the glass. So, each thread is a separate element that works separately from others. All items are connected to each other in parallel. This scheme allows you to provide a high reliability system. So, if there is a break of one thread, everyone else will work.
Typical malfunctions
Before repairing the rear window heating threads with their own hands, you need to find out the fault. Depending on what kind of malfunction is manifested by externally, you can diagnose the operation of the system even without a multimeter.
It should be noted that it is possible to start glass heating only if the ignition code is enabled. On some models, the auto turn on the heating of the glass can only with the motor running. This is done in order to reduce the burden on the battery. The system for full-fledged work is necessary from 10 to 25 A current.
Heating does not turn on
So, if the system does not turn on with the corresponding button, the corresponding fuse failed. A button can also be broken. If the performance indicators are glow, but the glass does not turn off, repair the rear window heating threads are starting with checking the connectors and relays. In this case, the electrical schemes find where parts are installed and change them.
Slow spontaneity
Sometimes you can observe cases when a considerable amount of time passes between pressing the button and on the button and turning on the heating system. If over the board the low air temperature or frost, then the reason for this problem can be in bad contacts on one of the connectors. Contact resistance grows, current becomes lower, power drops.
To check this malfunction, you must use the multimeter. Change the voltage at the terminals of the heating system and battery. These voltages should not be different.
Stripes remain on the glass
This is the most popular malfunction. The problem is associated with the breakdown of the threads that are applied to the glass. This malfunction can be diagnosed by bands on the glass after the system is turned on.
The threads installed on the rear window differ in low strength. And if they have a little effect on them, it will take the repair of the rear window heating yarns.
We define the place of the cliff
It is not difficult to find a break. Near the threads, foaming or a permanent disappear. That is why it is to quickly find a damaged element, threads consider and then find a damaged place. But sometimes the cliffs are so insignificant that they are very difficult to notice. Then the voltmeter should be used.
Due to the fact that one of the tires is connected to the body machine, the minus the multimeter wire is connected to the body. Next, a positive wire with a diploma concern the first and second tires. On the first voltage is +12 B, and on the second - 0 V. If for some reason there is no access to the bus access, then the measurements can be performed where the threads come out from under the seal.
If the heating is enabled, there are 12 V in the system, but the threads do not heal, then this says that the entire wiring is before the first tire in working condition. If there is no voltage, it says about bad contact. Requires repair of threads and rear window heating contacts. Can also fail the relay.
If the voltage is not only on the first, but also on the second bus, they are looking for bad contacts in the wire connection circuit of the heat heating system.
How to find a break
Thread is a tape with a resistance of 10 ohms. In different places, the voltage will be different. In the first point, the voltage will be 12 V, in the third - 6 V, in the fifth - 0 V.. If you do not know which threads are damaged, it is easy to find it. For this measure the voltage in the middle of each strip. If the thread is trimmed, then the voltage will be either 12 V or 0. Therefore, the break from the left or right.
Repairs
There are several ways to repaired this system. The most efficient and fast is to use a set for repairing rear window heating threads.
There are many of them, they are designed to restore the integrity of the ribbons. This set is all. It is a syringe with special paste. Reviews are well characterized by the Permatex tool. Repair the rear window heating threads with it is very easy and simple. You do not need any additional tools. Everything is in the set.
So how to repair? Everything is very simple:
- With the help of alcohol or solvent we clean the glass area at the point of breaking the thread.
- We take into my hands tape and stick it on both sides of the heating element. At the same time, the distance between the ribbon should not differ from the thickness of the heating thread.
- With the help of a tassel or a syringe, we apply conductive glue or paste (depending on which set will be used). How to apply it? The glue should be overlapped by a third of the thread of 10 millimeters on each side.
- We remove the tape and wait until the glue dries. According to the instructions, the composition dries out in 24 hours.
- A day later, we remove the excess glue. This can be done with a sharp knife - kitchen or stationery. Be careful - the knife can easily damage the surface of the heating element.
- We wipe the glass soft and slightly moisturized by the rag.
- Check the performance of the element.
You can also use another means for repairing rear window heating yarns. This is "ELEKONT" of domestic production. Mass are applied to the place where the thread is torn. Apply adhesive so that it overlaps the whole part of the thread from each of the parties. After hardening, the electrical heating system will earn again.
It is believed that glue can be made self (made of metal chips). But it is not worth doing this. The finished product is much more efficient. In addition, the reliability of the technology of self-making adhesive is not confirmed.
Conclusion
So, we found out how the heating threads are arranged and how to repair them. The complexity of repair is to find a non-working tape. After all, the system will work even when half of all existing threads occurred. True, glass in this case will move half.
The heating system of the rear window TC is a common equipment for almost every modern machine. The purpose of this functional supplement is to eliminate ice crust or sprousing from glass in winter. If the heating of the rear window does not work, the visibility is deteriorating, and the driver is deprived of the ability to rationally assess the circumstances on the roadway behind its own car. Restore safe driving will allow the speedy repairs.
Device of heating system
To understand how to restore the heating of the rear window, it is worth pre-examining the principle of operation of this system. Its goal is to eliminate fogging and preventing air cutting in the cabin. In winter, this function is indispensable because icing evenly leaves glass and at the moment when you already need to go, the review is 100% free.
The principle of operation of such a system in the case of the windshield is the effectiveness of directional air flow.
If we are talking about the rear window, compact heating elements come into operation, the source of which is the electrical network. Metal tracks are fixed on the surface of the glass from the cabin. These are numerous thinnest ribbons through which electricity passes, activating the heat release process. As a result - due to the heating of the glass, the water evaporates and the surface becomes transparent in a couple of minutes.
Scheme of work
To know how to restore the heating of the rear window of the car and with a high level of professionalism to come up to the repair, learn the principle of operation and the electrical circuit of connecting wires. From the terminal + battery power goes to the ignition lock, then on the fuses and last on the controller. After such a path, it follows the power contact relay. TC Body is associated with minus battery output. The activation of the heater supplies the voltage to the relay winding, then the power contacts are closed, there is also a connection of relay conclusions. The current flows by parallel to the connected tapes of the heater, then it falls on a minus output through the body of the machine.
Remember, the activation of the heater is possible only with the activated ignition key.
In some cases, a launched motor appears in the role of factor activation. Such a feature is due to the fact that the battery should not be prematurely discharged, and given the features of each brand of the car, the amount of consumption of this system can be 10-25 A.
Sources problems
Since to restore the heating of the rear window with their own hands prefer many drivers, you need to know about the options for repair, taking into account the source of the problem. In an independent check of the functional components of the machine there will be no obstacles if you have minimal automotive repair skills.
The safety element is the first thing that should attract your attention when the breakage is detected, since the system will not work if it overwhelms. The localization of this element varies depending on the machine model, so at this stage you will have to seek help from the TC service book. Next, remove the fuse and make sure it is working. Rear window heating repair will be limited to the replacement element.
The breakdown of the system relay can also lead to the opening of the heating. In this situation, the installation of the fresh item will also be enough.
Wiring
If the fuse replacement has not corrected the situation, proceed to the diagnostics of the feeding electrical conductors. Burning, fastening breakdown or fracture contribute to stopping current flow to heating poles. To detect this circumstance, turn on the heating button and measure the terminal tester voltage. You can detect the terminals at the bottom of the glass or on its sides. The lack of voltage on the wires should alert you.
Examine the entire path of wiring for integrity, clean the contacts of the terminals and connections. Oxidation in these zones often lead to voltage supply lock. If it was not possible to cope with this task, it will help you autoelectric.
In case of damage to the heating tapes, it may also be necessary to restore the heating of the rear window. To know how to do this, it is necessary to pre-explore the peculiarities of the workflow in this area. The heating element receives the voltage and the energy follows the threads. In relation to the base, they are connected in parallel and perform the role of current conductors. Their heating is due to a certain fraction of resistance, despite the insignificant heating temperature, it is enough for its purpose. If one or more threads are damaged, there is no current on them, therefore, these sites are not heated. Features of repair work in such a situation are described slightly lower.
Controls
If all the items that you checked earlier are good, you should pay attention to the power button. It is possible to determine the operation of the system along the lighting light indicator, which makes it necessary to know after pressing the button. If everything is activated and the corresponding indicators made itself felt, but the glass does not heat, it is likely to wear or burn the working contacts of the toggler, so the energy is not served. Repair of the heating of the rear window of the car requires only replacement of the button.
Import cars
In the case of imported machines, the repair of rear window heating does not limit itself to the diagnosis of the standard heating system, since the rear view mirrors are also equipped with heating. The activation of the heating of the glass of the feed leads to a parallel activation of the mirror warming up. If the system does not work on both zones, the most likely probability is that you are dealing with the cause discussed in the first point - a fuse or relay.
It is important to determine which fuses are connected with glass, because there are several of them. It will not be superfluous to diagnose the electronic board, which due to the disappearance of contacts and the rupture of the tracks is often wearing.
Phased repair
It is paramount to diagnose and purchase a repair kit. Repair kit options can be somewhat and below the repair technology in each case.
In addition to visual diagnostics of the state of the threads, there are several more methods, more reliable and effective:
- Visual diagnostics requires the activation of the heater when the rear window swam. Where the threads are torn, the surface almost instantly will move, whereas in the rest of the zones will be problematic.
- Using a voltmeter requires ignition activation and further turn on the heating system. One dipstick should lie on the mass of the vehicle, and the second near the center of the heating ribbon. Pre-second probe wrap foil. The opening will be localized in the zone where the voltage will rise to 12 V or fall to zero. Ideally, this parameter should not exceed 5 V.
- The second method of using a voltmeter implies fixation of one probe to the positive terminal of the heater, and the second must be moved along the tape of the negative terminal. The problem point will be where the voltage is zero.
- The use of an ohmmeter requires activation of the Kilo regime. The device must be analog, with an arrow. Probes should be located near the system conclusions that are in opposite sides of each other. Use distilled water to wet your wool, which you need to smoothly spend on the tape. As soon as the appliance arrow fade, you can detect the cliff area.
Repair conductive glue
Repairing the rear window heating yarns can be carried out using conductive glue. It is designed for temperature range from -60 to +100 degrees. Do not choose sets with glue, the cost of which is 150-200 rubles. Often they are enough for a while or they can be ineffective at all. The cost of 300-400 rubles will be optimal for such a set.
Procedure for performing work:
- Explore the instructions attached to the set. You must have a clear idea of \u200b\u200bthe embodiments of the composition and the speed of its full drying.
- Prepare a problem surface. Moisten the rag in the alcohol solution and wipe the site.
- Slightly clean the edges in the cliff zone with zero emery paper. It is enough to simply remove the flare and the tag with two movements.
- Take advantage of the scotch even to wake strips through the thickness of the sides. It should not overlap the thread, but also avoid the departure from the tape for a long distance. Focusing specifically on the width of the thread.
- Start applying a conductive adhesive on the prepared zone with a tassel or a syringe. From the instructions you will learn how many layers need to be applied. Fall on the working zones of the tape should be 1 cm left and right.
- Liquid your tape and wait for the composition to dry. Previously, this will not happen.
- Check the performance of the system after drying.
Among the demanded and reliable manufacturers of the repair kit, which includes threads, it is worth highlighting Quick and Permatex. Such options are suitable for repairing even extensive plots, even ate we are talking about 10 cm. The package assumes the presence of heating tapes, a polymer resin in the form of a spray and stencils.
The repair of the heater is reduced to the following actions:
- determine the rupture zone and prepare the filament of the appropriate size;
- eliminate the protective film and use the resin to fix the threads in the required zone;
- after complete drying, repeat the manipulation and check the result after 2 days.
Alternative method
Folk methods will also rise to restore the threads. The difference between them is only in the material used:
- Chips in combination with paint. The first material will be able to get copper and brass from the bar, which must be treated with files. Pick up the paint so that it is combined with a shade of heating tapes. Mix the components in the same proportions until you reach the mild dough consistency. Use an insulating tape or scotch to create a stencil. Stick stencil and activate heating. It is possible to determine the contact by characteristic hiss. Apply a mixture on a stencil. This method allows you to get rid of the need to wait for a day. You can operate the car immediately after the manipulations performed.
- The breakdown of the breakfast is carried out using zinc chloride. Prefer the act with the minimum content of tin - POSS-4-6 or POS-18. He lived from copper or silver is suitable for repairing an extensive ribbon section.
Another 25 years ago, the rear window heater was considered almost space technology, and his appearance on five and seven in export execution was caused by a frantic delight of the dyed owners of Soviet cars. Today, only a lazy manufacturer does not put the heating threads on the rear window, and this is no longer an option, but standard equipment for all cars.
How does the rear window heater
Heating threads are placed on the rear window of the car, on some models there are local heated windshield and rear side windows. The task of the device is to create a positive temperature on the surface of the glass, regardless of which temperature overboard. This will make rid of fogging, icing and ensure decent visibility in any conditions.
Standard, the heating system of the rear window consists of several elements. The composition depends on the model, but, for example, the components are as follows on the Renault Logan:
- conductive threads
- control lamp on the instrument panel
- fuse in the total block
- power button
- contacts
- heater relay
The principle of operation is simple - the terminal from conductive threads on the one hand is connected to the onboard electrical system, on the other, it is tied to the ground. When the current is submitted to the threads, they produce heat, warming the entire area of \u200b\u200bthe glass.
Video Tutorial Repair Rear Glass Heater
Typical breakdowns of the heater
Malfunctions in the system are visible immediately after starting the engine - if the glass warms unevenly, which says uneven exemption from fogging or ice, then you need to look for a problem. Most often, the non-working thread causes incomplete warm-up, but if the whole system refuses to work, then the reason to search need:
- in violation of contacts connecting a block of threads to a car electrical system
- in the refusal of the control relay
- in the fuse in the circuit of the electrical system
Non-working fuse reveal the easiest way - it is possible to ring it with a tester, or put a worker worker. If the heater does not start and now, consider the option with the relay. Nobody will disassemble and mess with the relay, it is easier to immediately try to connect the working. In the case of fiasco, we are preparing to restore the threads or replace the rear view glass completely.
Repair the heater with your own hands
Change all the glass due to one blinking thread is inappropriate. In Renault services, do not affect the repair of the threads, and they offer to replace the glass completely, so you can't call such an act. The procedure for restoring the heater is not complicated, does not take much time, with the right approach, will save a bunch of money.
Search for a problem thread and cliff
To find out which of the threads does not work, easier is simple - it will simply won't warm the glass in its zone, and with the definition of the break point will have to tinker.
Each of the threads is connected to the side vertical tires in parallel, therefore, it can work independently of adjacent threads. If you managed to find a break site visually, with a magnifying glass - excellent. If not, then the voltmeter can be useful.
On the plus tire, the voltage should be 12 V, therefore, at the break point of the current passing through the thread stops, and the voltmeter will show it with an accuracy of a millimeter. To do this, one probe voltmeter is needed to secure on the positive terminal, and with the heater turned on to spend the second probe on the non-working threads before the place where the voltmeter will show the absence of voltage. Localized broken. In the same way, it is possible to find out the place of cliff by a car probion or an ohmmeter.
Methods of troubleshooting
Repair of rear window heating can be made in several ways to restore incandescent threads. The choice of method depends on the width of the gap and the material of the high-resistance thread, but the optimal variants will be the following:
- Conductive pastes and adhesives. This is a simple, inexpensive and effective method. They can safely use if the width of the cliff is not more than 1 mm. There are several special sets for the restoration of the threads. Their price ranges within $ 12, they are sold in each automata. The kit already includes paste, syringe and additional fixtures for stripping.
- Even cheaper there will be a method for using conductive adhesive type "Contactol" or "Elektone". In this case, it is enough to simply apply glue to a damaged area with a distinguished area of \u200b\u200ba problem zone in 5-10 mm. If the glue is not a fake, then such a connection will be able to work for a very long time and do not cause problems.
- Method of electroplating copper shrinkage. The method is very good, but with the presence of a whole chemical laboratory. With your own hands in the garage conditions, its use can only be considered as a bold experiment.
- Soft solder. Affordable and reliable method for restoring the filaments of the heat. The threads are soldered by the method of ordinary soldering. But there is one important nuance - in no case try to clean the place of the spike by sandpaper. This will only lead to an increase in the width of the break. The thread is enough just to deflect acetone.
Conductive pastes and adhesives - inexpensive process of heating
If the width of the break is greater than a millimeter, then it is necessary to increase the thread of a 0.2 mm thick lifted vein. For repair, a soft solder of the POS-61 brand is used. At the same time, the heating thread is not necessary.
Thus, in almost 10 minutes, you solve the problem of rear window heating and save on an expensive replacement of the heater.
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At any time of the year, the driver needs a regularly working machine. And sometimes some details are considered not as important, but according to the law of meanness, they will be in a difficult moment. One of the troubles that can happen to the driver on the road is damage to the heating system of the rear window. Both in the winter during the period of cold weather, and in the summer in rainy weather, this feature of the car must be performed in full. Otherwise, moisture will fall into the salon, and visibility is reduced to the limit, as a result, the driver is forced to repair the vehicle rear window heater.
Heating system and function
The functioning of the heater is carried out at the expense of electricity. It is known that warm air flows are influenced on the windshield, special heating elements are needed for the rear. It's no secret that the inner side of the rear window is equipped with metal tracks having a large electrical current resistance. When the current proceeds along the ribbons, heat isolation and, accordingly, heating. The result is obvious: transparent, dry, heated glass.
The main function of this structural element is the fight against icing, humidity and fogs. As soon as the system begins to work, after a slight period of time, the glass is clean and transparent. In addition, this feature allows not to overcover the air in the car.
Damage to the heating system
As a rule, the driver notices damage in this part of the car, only when ice rear windows are constantly sweating and does not get rid of ice. After turning on the heater, in an ideal in a couple of minutes, it should be transparent and clean, but if this did not happen, it means there was damage or function in defective. Among the damage to the system should be allocated:
- Slow glass focus. If visibility does not improve after a few minutes of operation of heating, it means that the functioning is broken. The reason may hide in the fragile contact of the circuit connector.
- Lack of heat performance when it is turned on. In this case, after pressing the indicator does not shine. This can be associated with a faulty key or burnt fuse.
- Having a glass of horizontal poverty bands. As a rule, such a malfunction can occur due to the cliff of the heating threads, which are applied to the glass surface.
Slow glass focus
Whatever happens, the main thing is to produce the right repair of the heating of the rear window with their own hands or with the help of a specialist.
Definition of malfunction and repair
It is believed that it is quite simple to determine damage in the heating system, and each driver will cope with the specified task. Before starting work, it is recommended to calculate the threads deposited on the glass so that it was then easier to remember which the account is damaged. There are cases when the gap is impossible: it is so small that one of the devices should be used. It may be a voltmeter or multimeter. In any case, to repair the rear window heating yarns, you need to carefully study the surface and identify damage.
There are several effective troubleshooting methods:
- The method of visual diagnostics - in damaged places with the heated glass is not heated and remains missing.
- With the use of a voltmeter - with the heater turned on, one probe should be put on the "mass" of the machine, and the second, wrapping the foil, put in the center of the thread. It is necessary to monitor the voltage, its indicator should not exceed 5 V. If the device shows 0 or 12 V, then the gap is in this place.
- With the use of an ohmmeter - the device is included in the "Kilooma" mode and is connected to the opposite leads of the heater. Mix the mob and spend on the thread. In the place where the arrow will twitch, and is a break.
Determination of rear window heating malfunction
It is possible to repair the heater with a variety of methods, for example, to acquire a special set for repairing the rear window heating threads.
You can repair the system using a repair kit, conductive paste and folk methods. The main difference of all options are the materials that are used during operation.
Materials for repair
By purchasing the repair kit, the driver has the ability to fix the heating thread to 10 cm. Materials used in such sets:
- pattern with threads;
- thermally active polymer resin in the cylinder.
Rear window heating repair materials
Works are carried out strictly when the heating system is turned off. Having determined the place of damage, it is necessary to remove the protective film from the template and attach to the place found. The application of the polymer material is made with a brush, and after drying it is repeated several times. After performing work, the stencil is removed and preferably not to include the heater during the day.
In the case of using a conductive paste, only a construction hairdryer may need, which speeds up the drying of the material.
The materials that are used in the "folk" methods of repair of the heater are paint (glue) and chips, metal for soldering a damaged place. As a rule, the paint is selected according to the color of the threads and connect with the chips, sticking to the ratio of 1: 1. To work, you will need a stencil for which the mixture is applied (when the device is turned on). The advantage of this method of repair is the absence of the need to expect drying during the day. The driver can immediately go after the work. For soldering, zinc chloride is suitable.
How to restore heat with glue
Quite often, drivers use conductive adhesive for rear window heating repair. The material is mixed with chips, which is extracted with a file or copper-brass bar. The proportion of 1: 1 is observed. As a result, the consistency of the soft test is obtained. With the help of tape or tape, stencil is made, and the prepared mixture is applied to the place of damage. After the procedure, it is not necessary to wait for the drying of the materials and you can immediately move on the road.
Glue for rear window heating repair
What to do with contacts, and other methods
If the contacts were damaged in the heating system of this element, it is best to use the soldering method. This method is the most reliable and for a long time will help you forget about this problem. Zinc chloride is perfect for work. It is recommended to take a solder with a minimum tin content. After the end of the work, the glass must be well rinsed with water to remove the remains of the chemical.
The price of heat recovery
In fact, repair the heater is quite simple and inexpensive. Taking advantage of the "paint + chips" method, the driver will incur minimum costs, acquiring the paint of the desired color (or using the material) and prepare the sawdust. If you acquire a strapar, it will be much more expensive. The cost also depends on the conductive adhesive manufacturer. It can be a well-known and expensive Keller firm or a cheaper producer - Loctite. Alternative option will be the glue of the Russian company.
Car rear window heating often fails. In most cases, it refuses not completely, and fragmentary: individual zones or heating threads do not work. To replace in this case the glass is completely irrational.
There are various ways of self-repairing threads and other elements of the heating of the rear window of the car in order to restore their performance. Consider them in this article.
Principle of operation
The heating of the rear window of the car occurs due to the heating of special filaments deposited on the glass when direct current flows through them. The threads are made of a conductive material of low resistance. The total current of the rear window heater is about 10 amps. The number of threads is about ten. Thus, a current of approximately 1 amperes flows through each thread. It is easy to calculate according to the law of Ohm, that the resistance of the thread is about 12 ohms.
The nithe of the heater is applied with the technological process of manufacturing the rear window at the factory in several ways:
- electrochemical;
- vacuum spraying (the most reliable method);
- sticking.
The chemical composition of such threads may include various elements, alloys and composite materials: resins, copper, graphite, nickel, chrome, tungsten. The manufacturer does not declare production technology, so for each technology (heated glass) you have to select the appropriate way to restore performance.
For example, a soldering is practically impossible if the threads were sprayed in vacuo carbon composition. In this case, only conductive adhesives are effective.
Connection scheme
Usually, the rear window heating thread is supplied to the battery voltage through the fuse systems, switches and relays according to the scheme below.
In some models of cars, the rear window heating is possible only with the engine manner. For this, another blocking relay is provided. The fuse mounted on the heater power supply chain typically has a nominal value of more than 15 amps.
Signs of malfunction
The main signs of the heating of the rear window:
- does not turn on completely;
- turns on, but not all threads work (the most common case);
- works periodically.
Why the rear window heating does not work: reasons how to check out the place of refusal
If the heating of the rear window stopped working, but it works, but with interruptions, this may be due to the following reasons:
1. Fault of the electrical equipment of the car.
Finding a place of failure should be started with a fuse that serves a heater. If it is working, then check the switch (button) of the heater, relay, electrical wiring to the heater contacts.
The rear window heating switch button is checked using a multimeter. Its contacts are often tightened as a result of a large current. In this case, it must be changed.
One of the most likely places of malfunction of electrical equipment - a bummer (or paying) the place of attachment of the contact terminal to the heater. Repairs in this case is difficult. It is required to produce a soldering with the help of special solders and flux. It is also possible to glue conductive paste.
Often wiring is damaged at the place of crossing the corrugations, where the wiring from the body to the door of the trunk is located. An opening of corrugations is required, wiring extraction, searching for a broken conductor and eliminating the breakdown.
2. Ombol of the filament.
Such a malfunction may be associated with the removal of a sunscreen film, mechanical scratches on glass, natural wear.
Video - How to check the rear window heating by a multimeter:
To search for a specific location of the thread break, if it is imperceptible to the eye, you must use the multimeter. Its probes should be sharpened or connected with sewing needles. It is necessary to ensure reliable contact of the probes with the heater threads. First, the method is visual or tactile (touch), the method determines the faulty thread (threads). It does not heat up. Then the resistance is measured in extreme sections of the thread.
After determining the place of damage to the thread, it must be marked with a marker.
How to fix the heating of the rear window do it yourself
To repair the rear window heating, you should purchase a special conductive glue or ready-made heater repair kits. It is necessary to carefully read the repair technology, which should be described on the packaging or the attached instructions in Russian. The success of repair work is determined by strict compliance with the technology specified in the instructions.
Video - repair threads of rear window heating with their own hands:
Overview of sets and glue for repairing threads and contacts of heating rear window
Set Permatex PX 09117
The set includes:
- adhesive for threads 1.4 ml;
- contact for contact 0.8 mm;
- tassel for applying glue;
- template;
- sandpaper;
- napkin activator;
- alcohol napkin.
Mode of application when repairing contacts:
- clean and degrease the surface;
- clean contacts;
- wipe the activator of the surface, wait 5 minutes;
- apply a small (!!!) drop of glue so that it does not make the surfaces bonded;
- press contacts;
- give a day drying.
Mode of application when repairing thread:
- degrease the surface to which the thread will be applied;
- attach pattern;
- wait 20 minutes;
- repeat the application of 3-4 times at intervals of 20 minutes;
- the heater is included in 24 hours.
The cost of such a set is about 1000 rubles.
AVS A78358S glue
Such conductive adhesive for repairing rear window heating yarns 2 ml costs about 200 rubles.
Conductive adhesive for repairing rear window heating threads.
The price of glue is about 400 rubles.
Video - How to glue the contacts of the rear window heating without removing the glass:
Repair technology is approximately the same for all industrial manufacturers. The main thing is to degrease the surface well and do not rush. If you cannot find special compounds for repair, you can try them to make them yourself or use other recovery methods.
Independent manufacture of conductive glue, soldering with special fluxes, electrolytic coating
1. Independent manufacture of conductive composition.
As the basis, the common glue BF-2 or BF-6 is often chosen. You can use other quick-drying adhesives. There are options for using a polymer resin, paint, enamel. In order to make a conductive paste from these materials, it is necessary to add a fine chips into it in a ratio of 1 to the 1st. The chips can be "mined" with a small file or supphilyla and copper, aluminum or brass material. After mixing the components, they are applied to the prepared surface through the homemade stencil. It is not difficult to make it with the help of construction tape or tape.
The effectiveness of such a self-made composition will not be worse than purchased.
2. Soldering the place of breaking thread and disconnecting the terminal.
The soldering place of the thread break is impossible if the distance between the end of the thread is more than two millimeters. In this case, you can pre-use the electrochemical method. When restoring the contacts of the connections of the heater terminals, the soldering is more efficient and reliable. The soldering is produced by a classic method using an active flux and solder. As a solder, choose POS-18 or similar. Flux is better to use a TC type based on zinc chloride.
3. Electrolytic coating.
To carry out such a coating, a solution of copper sulfate is required (the proportion is 100 milliliters of water, two teaspoons of copper sulfate, you can add a few drops of rechargeable electrolyte), rags, thread, stranded copper wire with a cross section from 6 square meters (for the manufacture of a copper bruster prototype).
Next, the copper brush from the stripped conductor wrapped with rag and thread is connected by the reverse end of the wire to the power supply of +12 volts (AKB), minus the battery is connected to the body or directly to the heater terminal. Bruster wetted in homemade electrolyte. After that, a moistened tassel is vigorously water at the site of the breaking of the thread. The processing place is gradually covered by the electrolysis process with copper particles.
