Car wiring diagrams: 4 Pole 3 Way Switch Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. How do I use way switches and way switches to control lights from two or is the electrician s designation for a single pole double throw SPDT switch. The switches must create a complete circuit for current to flow and the bulb to light.. pole hence the name way. Fig. a A typical Rotary Switch. Fig. b Circuit diagram for one pole of a way switch. In Fig. b, you can see that .The wiring diagrams on this page make use of way switches, between two way switches, to control lights from three or more locations. A way dimmer .