I am working on a 773 serial #509637403. The hour meter and the gauges are not working. I have my 12 Volts in the right side upper panel on the orange wire when it comes into the fuel guage its like I lose 6 volts. Now if I that a wire with 12 volts on it and connect it to volt gauge the water temp and the voltage gauges will start to work. Any ideas? Thanks Steve