Need help, I bought a boat recently, the motor was stolen off the rear of the boat in 2001. Who ever stole the motor used bolt cutters to cut the harnes. I can not get any of the gauges to work , Tach,Fuel,Trim. We have checked the volts at the gauge posts from all gauges, the volt are 12, with ignition on,14.3 volts when motor running. Checked sender wire and got 6.7- 6.9 volts when running, just what it suppose to be. My question is when they cut the haness could they have shorted out all these guages with the bolt cutters. It just seems funny that all these guages are not working but the volts are still there. The power and grnd wires are linked from one guages to another. Any help would be thankful