electrical problems are solved - Toyota Supra, 1990

The fact is that since last year a problem has appeared in the car - the dimensions have ceased to burn, and the illumination of the dashboard, as I found out, is all the same. as it turned out, the control signal for switching on the relay disappeared, so far I can not understand anything where to look for it. + to everything, on my dashboard, a light comes on for unfastened seat belts,

but I don't even have such wires, there are not even such sensors. :( I still can't understand what the problem is, so far I have disassembled the dashboard and fiddled with the wiring. Trying to understand where there are problem areas.
In general, the situation is this: Turn on the interior lighting, the paw goes out, turn off the ceiling - the light on the dashboard comes on.
Then some photos made, in order to remember how it should shine.