Why Does My 3 Way Switch Not Work May 21, 2019 Linear WD500Z installation issues. I"m trying to hook a WD500Z into a 3 way switch setup in a new house. This would be the master switch and, if I can ever get it working, I would put one of the WT00Z switches as a slave.Here& Wiring Multiple Light Switches From One Power SourceHow To Wire A Timer Relay5 Pole RelayHow To Wire 4 Light Switches In One BoxKenwood Kdc X592 Wiring Diagram12 Gauge RomexWiring Diagram For Trailer Hook Up110 Ac Plug Wiring