Finding positive side of a switch Tagged: Positive, Switch, wire This topic contains 1 reply, has 2 voices, and was last updated by Joe L 1 year, 3 months ago. Author Posts November 3, 2016 at 4:26 pm #7881 Ed FrancisParticipant Is there a way to determine which terminal is connected to the “off” side of a switch? Need to attach it to a wire. Thanks November 3, 2016 at 4:38 pm #7882 Joe LGalco Representative Hey Ed, Switches are actually very easy – They do not have any sort of polarity! This means that the terminals will act interchangeably. Good luck on your project! Author Posts You must be logged in to reply to this topic.