3 Way Switch Definition February 9, 2019 Charles Petzold. Charles Petzold is the author of the books Code and The Annotated Turing www.charlespetzold.com 12 2 RomexPaddle Switch WiringSingle Switch Multiple LightsGround Wire Size2011 Gmc Sierra Trailer Wiring Diagram4 Way Plug TrailerPioneer Deh-2100ib Wiring DiagramLuxpro Thermostat Wiring