ceiling lamp sometimes works sometimes does not work

Hello everyone. The ceiling lamps of my 307 sw 2004 model vehicle are sometimes disabled. When I open the doors or press the button manually, it does not work. But sometimes everything returns to normal by itself. What could be the problem. Has anyone ever happened to you before?

Sir, it is necessary to check if the line of the ceiling lamps is receiving electricity. even disconnection etc. may be. This problem is only in the back or there is also in the front.

Have you checked the nests of the ampoules? There is a situation such as rust and lack of contact.

The masters say that the electricity comes on when it is not burned. That is, it is not possible for the cables to have a problem. It is not possible to have light bulbs. Because all of them are working or not working at once, the friends seem to have a brain problem. Drop me here! sedat29342020-06-19 15:58:36

Craftsmen in the industry in Izmir said there is a bsi problem. He said that the repair will cost around 500 TL. Bsi said that the reason for the breakdown was the camera, parking sensor, etc. I installed in the vehicle. Only ceiling lights are causing trouble now. Let it go as far as it goes.

Sir, my ceiling lamp has failed, the fuse is not a problem, how can you detect the bsi failure?