1990 F250 XLT Lariat. Reg cab long box. Anything to do with lights do not work besides warning lights like check engine and flashers and blinkers. Cab lights do not work. Radio does not work. Head lights. Tail lights do not work. Brake lights do work. Put a new lights switch in. Nothing. Jumped wires and everything works fine. Just curious if I'm doing some stupid mistake. All fuses are good. Help please! Can't drive my truck otherwise!