Rocker Switch Wiring Diagrams | New Wire Marine The wiring diagram below will demonstrate how to to wire and power this 12V 20AMP (ON)-ON-OFF 3 way Carling Contura rocker switch. This rocker is perfect for an engine OFF/RUN/START switch. It is OFF at the bottom, ON in the center, and Momentary (ON) at the top. Related searches for 2 prong toggle switch wiring diagram 2 prong toggle switch diagramtwo prong toggle switch wiring2 prong toggle switch4 prong switch diagram3 wire toggle switch wiringtoggle switch wiringtwo toggle switch wiringtwo prong toggle switch