hi i have a 69 coupe, and im having problems with the gauges in my car. the fuel gauge, oil pressure and temp worked some of the time. so we cleaned up the ground. then i decided to change the light bulbs to l.e.ds so i unplugged the harness and changed the bulbs and cleaned up the grounds where the bulbs plug into, then i plugged it back in and now the gauges dont work. the lights do though. i got a new voltage regulator and tried that but it didnt change anything. if you could give me any ideas or help that would be awesome. thanks