Anyone who has (had) a VAZ car of the 21099 family will understand me. I have a 2115 vaz. All of these cars have a lack of taillights, brake light, dimensions, collars. The plate itself, where the bulbs are located, is plastic, but the contact path is made of film, the film is thin, so the light bulb’s contact with the contacts on the film is very unreliable. For a long time I was going to remake the board, throw out the film, and put individual cartridges in place of the light sockets (see photo). To do this, we buy (two lanterns) 4 two contact cartridges, 2 single cartridges, a 4-pin female-male connector.
We begin the assembly. To do this, make holes for the cartridges, insert them into the holes. For reliability, melt fastened with a pistol. Wires soldered to the connector "mother". That's like the whole alteration. Now the contact does not disappear, even on bumps, on an uneven road. The problem is resolved.