VAZ-2105 is the first domestic car with electric heated rear window, which appeared in the 80s of the last century. Since then, heating threads have appeared on many machines; individual conductive strips have failed on many. And motorists have come up with several ways to restore them.
Necessary
- - voltmeter;
- - low-tin solder and zinc chloride;
- - graphite powder, iron filings, nitro varnish, epoxy;
- - silver sawdust and nitroclays;
- - copper sulfate solution, cloth, long copper wire;
- - electrically conductive adhesive
Instructions
Step 1
Find damage in the heating filaments using a voltmeter. To do this, connect one contact of the device to the busbar, and smoothly drive the other along the idle strip. Another method of finding a broken thread: turn on the heating on the fogged glass. In this case, all glass will quickly sweat except for the place of damage. This method is simpler than the previous one, but it is not accurate and does not always work.
Step 2
Regardless of the chosen repair method, first clean the damaged area from the varnish until a metallic sheen appears. It is more convenient to do this with a bent wire. Degrease in any way. Having skills in soldering, solder the damaged area with soft low-tin solder such as POS-18 or POSS-4-6. Use zinc chloride as a flux. If there is damage over a long stretch, solder a thin copper or silver strand from a suitable piece of wire.
Step 3
To repair using another method, coat the damaged area with a mixture of graphite powder and a small amount of epoxy glue (resin). To make the work better, install a strong magnet on the back of the glass, and put small metal filings in place of the restored area. They will restore contact between the conductive threads. After repair, treat the damaged area with nitro varnish. Remove the magnet after the varnish is completely dry. When applying sawdust, try to hit the conductor strip as accurately as possible, and not the entire surface opposite the magnet. This will help make the repair site invisible.
Step 4
For the third method, take silver filings. Prepare them by filed off the alloy of the contact of the unnecessary power relay. Pour sawdust into the fold of a sheet of paper and add a drop of nitro glue. With the end of the knife, quickly roll out cylinders with a diameter of 1 mm and a length of 2-3 mm from the sawdust. Apply it to the damaged area and crush, pressing firmly on the sawdust. Remove excess.
Step 5
Another method is perfect for restoring a damaged area or the entire heating thread. Prepare a solution of copper sulfate, consisting of 6 parts of water, two parts of powdered sulfate and one part of electrolyte for the battery. Mix thoroughly. Take a thick, long copper wire from the positive terminal of the battery to the glass with threads. Wrap a piece of fabric 1-2 cm wide and 10-15 cm long around the end of the wire and secure in any way.
Step 6
With the other end of the wire connected to the positive terminal of the battery, soak the wound cloth in the prepared solution. Begin rubbing vigorously at the break for 1-2 minutes. This will start to deposit copper around the intact filament. Copper will look like patterns on frosty glass. When restoring the entire thread, start from the place where it is connected to the side live parts. This method is cheap, affordable, and has a high durability of the restored area. On the other hand, it is quite long-lasting.
Step 7
For a more modern restoration method, purchase a special electrically conductive adhesive. When buying, consult with the seller. Use the stencil supplied with the product to restore the filament. Apply glue to the damaged area with a soft brush through a stencil and dry for 10-15 minutes.
