2013 and 2014 both have EPS, 2013 was the mid model refresh which brought many new electrical improvements.
With that being said I am going to venture a guess and say , no, it can't reasonably be done. Since it was a refresh and electrical update the Ram went with "pulse width modulation" in the electronics with 2013 and up, prior to that Ram had a standard 12 volt system.
Maybe someone else may have some different info.