Digital Timer Switch Wiring Diagram – The difference between a normal switch plus a a few way switch is a extra terminal,or connection. A 3 way switch has 2 terminals that happen to be both metallic or brass colored and something terminal which is darker coloured. The gold or brass terminals are called vacationers or messengers and the darkish shaded terminal is called the most popular. If all three terminals look very similar in color, the typical terminal is going to be identified by the phrase “common” stamped on the back of the switch.