Help wanted for my car concerning airbag and amature lamp

Hey guys, I have a Daewoo Nexia built in 1997 and I have 2 problems there, on the one hand in the center console is a backlight half dark and there is the question, how do I get there to switch to the bulbs? and on the other question, my display for the airbag lights permanently. So the following situation had been today. I checked several things on the car and wanted to finally look why the light from the AirBag in the amatur board does not shine. I found out that there was no light in it when I put in another test method, the light turned on, but it didn’t go out, even when the engine was running. I heard from a colleague that it might be a mistake in the board computer, because the car had a crash but had been restored so far, so there are no problems in itself. And another colleague said that maybe the knobs in the bumper might be activated sin d, how can I check what’s going on with it or are there other reasons for this to last? I hope someone can help me? I have to go to the tuv next month and so really money about for expensive workshop I don’t have, and I’m not quite clumsy. Thanks already in advance. Michael