1994 Buick Century Head lights, Tail lights, dome light and

Electrical problem
1994 Buick Century Front Wheel Drive Automatic

I just got a 1994 buick century for free and the head lights and brake lights and all the interior lights do not work the fuses in the fuse box seem to be fine I checked them all. I dont know what else to do I don't have the money to take it to a mechanic for them to figure it out and fix it so if its something that I can do by myself then I would prefer that!