Repair of threads of heating of back glass with their hands: step by step instructions, and device reviews

Current car is supplied from the positive terminal of the battery through the ignition switch and through the fuse. Then the voltage goes to the defogger switch and relay contact. Battery negative connects to the back of the car. One of the wires of the heating system of glasses also connected with the body.

When the driver presses the power key of the system voltage comes to the relay. It is triggered, closed power contacts. Current goes to the heaters passes through the filament heating and then through the body goes to the battery.

Device heating element

The Heating element has the following device. The sides of the rear window there is a conductive bus. To them is attached a special yarn made of materials with high resistance. The resistance of each filament is 10 Ω. Their Number depends on the size of the glass. Thus, each thread-is an individual who works separately from the others. All the elements are connected to each other in parallel. This scheme allows to ensure the system high reliability. So, if there is an open one thread, all others will work.

Typical fault

Before you can repair the threads of the heated rear window own hands, you must find out the fault. Depending on what the fault is manifested outwardly, it is possible to diagnose the system even without a multimeter. Note that to run the defroster only in that case, code the ignition is on. On some cars, turn on defroster only when running the motor. This is done in order to reduce the load on the battery. The system to be fully operational from 10 to 25 A current.

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Parking is not included

So, if the system is not activated with the corresponding button may have failed the fuse. Also could be a broken button. If the lights work are lit, but the glass differences do not sweat, repair of threads of heating of back glass should start with checking the connectors and relays. In this case, electrical circuits to find where you installed the parts and change them.

Slow sweating

Sometimes you can see cases where between pressing the button and turning on the heating for condensation or glass takes a significant amount of time. If behind a Board a low temperature or frost, the reason for this problem may be a bad contact on one of the connectors. The resistance of the contact increases, the current becomes lower, falling output. To test this fault, you need to use a multimeter. Change the voltage at the terminals of a heating system and battery. These stresses should not vary.

Glass streaks

This is the most popular fault. The problem associated with breakage of filaments, which are deposited on the glass. This fault can be diagnosed on the strips on the glass after switching on the system.

Threads that are installed in the rear window and have low strength. And if them even slightly to influence the mechanical, it will need a repair of threads of heating of the rear window.

Define break

To Find the breach is not difficult. About thread zapoteet or permafrost is not lost. Therefore, to quickly find the item is damaged, the threads believe and then find the damaged area. But sometimes the breaks are so small that to see them is very difficult. Then you should use a voltmeter.

Due to the fact that one of the tires connected to the car body, the negative lead of the multimeter connected to the body. The positive wire from the probe touch the first and second tires. The first voltage is +12 V, and the second – 0 V. If for some reason access to the tires not, measurements can be made where the threads come out from under the gasket. If AAA is enabled, the system has 12V, but the thread is not warm, it says that the entire transaction until the first bus in working condition. If the voltage is missing, it indicates poor contact. You want to repair the threads and contacts of the heated rear window. Can also fail the relay.

If the voltage is not only on first but on the second bus, looking for poor contacts in the circuit wiring of the heating system to the ground.

How to find the open

Thread – a ribbon with a resistance of 10 Ohms. In different places the voltage will be different. At the first point, the voltage will be 12 V, the third – 6, fifth – 0 V. If you do not know which of the threads is damaged, it is easy to find. To do this, measure the voltage in the middle of each strip. If the filament is broken, the voltage will be either 12 or 0. Therefore, an open left or right.

Renovation

There are several ways to fix this system. The most efficient and fastest-is to use a kit for the repair of threads of heating of back glass. A lot of Them, they are designed to restore the integrity of the tapes. This set has everything. It is a syringe with a special paste. Reviews wellcharacterize the tool Permatex. Repair of threads of heating of back glass it is very easy and simple. You don't need any additional tools. All is in the set.

So, how to repair? It's very simple:

• With alcohol or solvent, clean the area of glass in place of tearing.
• Take up the tape and glued it on both sides heating element. The distance between the tape should not be different from the thickness of the filament heating.
• Using a brush or syringe to apply a conductive adhesive or paste (depending on which set will be used). How to apply it? The adhesive must cover the whole part of the thread for 10 mm on each side.
• Remove the tape and wait until the glue dries. According to the instructions, the composition dries in 24 hours.
• A day Later, 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.
• Wipe the glass with a soft and lightly moistened cloth.
• Check the operability of the element.

You can Also use another tool for repair of threads of heating of back glass. This “Elekont” of domestic production. Weight applied to the place where the thread is broken. Apply the glue so that it overlaps the whole part of the thread on each side. After hardening, the electrical heating will work again. It Is believed that glue can make your own (from metal shavings). But this is not worth. The finished product is much more effective. In addition, the reliability of the technology of self-production of glue has not been confirmed.

Conclusion

Now, we find out how the filament heating and how to fix it. The complexity of the repair is to search for broken strips. Because the system will work even when there is a break half of the available threads. However, the glass in this case it will fog up halfway.