I just recently put a custom dash with all autometer gauges in my chevelle. I re-did the whole wiring harness and hooked up all the gauges into the factory harness. My question is, I'm using a batter charger to power the circuits to make sure everything works. When I power the circuit for the voltmeter it only reads 10 volts. Now I have 3 settings on the charger, 2 amp, 10 amp, and 50 amp engine start. The 2 and 10 amp both read 10 volts, but when I switch it to 50 amp, it reads the 12.6 or what not, like its suppose to. Does this sound right?