Yesterday I installed some new autometer gauges and one of them is a voltage gauge. I think I may have it hooked up wrong because when I start the car the needle goes all the past 18 and stays there. Does anyone know what the problem could be. I think I may have it on the wrong fuse as I just looked in the owners manual and i see the fuse for the ignition switch is under the hood and not under the dash. Little help please.