10:14. Heating system of back glass

Fig. 10.11. Scheme of inclusion of an element of heating of back glass: 1 – assembly block; 2 – element of heating of back glass; 3 – switch of heating of back glass; 4 – switch (lock) of ignition; 5 – main unit of safety locks; And – to the control unit of an electropackage, the 10 plug; In – to the module of control of lighting engineering (the regulator of lighting of devices), the 58b plug; With – to the plus plug of the rechargeable battery; K4 – the additional relay (the ignition relay); K2 – the relay of inclusion of heating of back glass

The scheme of a heating system of back glass is provided on fig. 10.11.
The heating element of back glass joins by means of the K2 relay installed in the assembly block.
For prevention of the category of the rechargeable battery the heating element left included at the idle engine heating can be included only at the included ignition. For this purpose food to the switch 3 moves via the additional relay (the ignition relay) K4 working at inclusion of ignition and F11 safety lock. Food to a heating element moves through F2 safety lock in the assembly block located in interior of the car.
If at heating inclusion glass of a door of a back is not warmed, check a safety lock of F2 and F11 in the assembly block, F2 safety lock in the main unit of safety locks, wires and their connections, the switch and the K2 relay.
If all safety locks, the relay and a power-supply circuit of a heating element are serviceable, check serviceability of conducting strips.
An inspection is carried out at the working engine and the included electrical heating of back glass. Serially measure by the voltmeter tension on all strips, having connected one conclusion of the voltmeter to "mass" of a body, and another it is consecutive to conducting strips. If tension measured by the voltmeter in the beginning and the end of strips, equally and approximately equally in tension of the rechargeable battery check reliability of contact of a "mass" wire of a heating element with a car body.
Tension on a strip has to decrease in process of removal of the place of connection of the voltmeter from the tire of positive polarity of an element. Tension needs to be measured at least in two places at identical distance from a symmetry axis to exclude probability of the admission of the damaged site. At detection of discrepancy of indications on one of strips move contact of a wire of the voltmeter along this strip until tension does not become equal to zero. Sharp undervoltage indicates a rupture of a strip in this place. Mark on the external surface of glass with a piece of chalk or a steklograf the place of a gap for the subsequent repair of the damaged site.
For repair of a heating element it is possible to use one of the special sets which are available on sale which part silver is. In spite of the fact that sets are made by different producers, their structure is approximately identical, all sets are supplied with the instruction for application. The standard operating procedure with these sets is given below.
1. Remove the site of a strip 6 mm long from each side of the damaged place.
2. Wipe the damaged place with the pure fabric moistened in alcohol.
3. Paste on glass in the place of damage of a strip a repair adhesive tape or two pieces of a usual adhesive tape from above and from below the repaired site, and the distance between pieces of an adhesive tape has to correspond to width of a conducting strip on glass.
4. Carefully mix a hardener with the main structure of silvery color. If the hardener thickened, place packing with it in hot water and wait when the hardener becomes liquid.
5. Apply with a wooden shovel composition on the repaired site and remove an adhesive tape.
6. Install the heater at distance of 25 mm from the damaged place and heat composition within 1–2 min. The minimum temperature of heating is 149 °C.

Note
In some sets the structure should not be heated: it will be polymerized at the room temperature.

7. If after drying the strip becomes colourless, apply on it with a brush the tinting iodic structure — color of a strip will be restored. After the iodic structure dries up during 30 with, wipe pure fabric without pile its surplus. During polymerization of the repair composition proceeding 24 h exclude any mechanical impact on the repaired site of a strip.
8. Include and check work of a heating element of back glass.

If the wire came off the tire, solder it the solder containing 3% of silver and gloss oil paste as gumboil in the following order.
1. Clear the place of the soldering on the tire and a wire vein.
2. Apply with a brush on the connected places of a wire and the tire of a little gloss oil paste.
3. Apply a thin film of solder on a wire vein.
4. Solder a wire to the tire, avoiding an overheat of the connected details.