Electrical problem with 1998 Mitsubishi Eclipse GS?

Hey guys,
I have a problem, i hope someone can help me resolve it.
Ok so, I recently bought a 98 Eclipse. The car runs great and i love it. There is only one thing that bothers me: There is no power inside, like the lighter/power socket is out, no overhead lights and no lights on the dash board. Also there is no power to the sunroof. Does anyone have any idea what could be causing it? I already checked all the fuses and they all seem to be fine. I dont really want to take it to the money-hungry electrical shop, the dealer told me $100 just to look at it LOL.

You’re 100% sure the fuses are fine?

I have the fuse checker, i checked every one of them. I haven’t checked the relays yet, no idea how to, and i also noticed the horn is out, so i think it could be the relays.