Couple of questions, 86 chevy

[Buck4x4]

Hey guys this is my first post but ive been on here for a little while. So my 86 chevy's radio stopped working, i think it was the other day when a chord was hanging down and i might have clipped it with my foot and unplugged it, but the lights behind my gauges on the dash also dont work , so i dont know if i unplugged a main cord or what, and the cords are kind of jumbled and crazy, cause the guy i bought the truck from put in speakers and a sub in the back and did a weird wiring job