Thanks 3B
My ammeter was not working correctly it was showing discharge. I did not have a battery in it when I got the truck and the battery cable going to the frame was a red positive cable so someone before used the wrong cables.

Thanks red58
I assumed it was positive because it was red and the black negative cable was going to a starter that has a solenoid which I'd like to convert to the foot starter as original.

Thanks again gentlemen, that answers my concerns.