Did some aditional testing tonight. .9 volt of my 1.3 volt drop is through the secondary contacts in the master on/off switch that control the alternator circuit. I'm not to happy with that on a brand new switch. I also brought my amp clamp home to test draw. Fans together 29A Performance Engineering fuel pump 18A Miezere water pump 7.5A headlamps,tail,dash 12.5A Doug