Ok looks like windows decided to change my internet settings
Ok so why did i choose a single wire.
I dont have an ignition light, nor does deans caddy
I dont have a water pump driven by a belt, mines electric.
No one had a 160A unit over here any way so i got mine from jegs.
Plain and simple, if your car already has an Alternator stick with a 3 wire if it doesnt go with a single.
As for sensing, i have digital guages telling me everything going on with my motor, if the water pump stops the guage tells me. Also i have an ammeter which is wired in series with the battery telling me my current draw i dont need to know voltage.