Need help with my Mopar

Well sorry to hear about his back, I hope that gets better soon. I moved out of those apartments into a house so I decided to buy this 73 Dart Sport. Anyway I am having a ***** of a time trying to get all the lights to work, only thing that works now is the headlights and running lights. No blinkers, no brake lights just the dim running lights, no license plate light, no interior lights, nadda. I have used my multi-meter on the fuses and have 12v going across all fuses so I am assuming its either a bad ground or bad wiring. Its funny the entire outside of this car is rust free, I look under the dash and it has been leaking in through the windshield wiper. So tommarow its back to the ol' wiring fun...