okay so I did e-fan on the truck and loving it I just put in a 95 ford tarus fan its a beast, at idle with headlights off and fan on low speed and ac on its 14.5v all day but with the headlights,e-fan,ac all on 13v holy crap!! so I put the 160amp alt on it help a little like now its at 13.4-.5 at the fan its pretty much the same V, battery is couple years old an 850cca the e-fan needed 10ga which I did with 50amp relay and fuse what could be wrong with this setup at idle with the low voltage, now when driving it goes back to 14.5v with everything on