3 Way Wall Switch May 28, 2019 Understanding Three. Three-way wall switches are most commonly used to control a light fixture from two locations, such as from both ends of a hallway or stairway. www.thespruce.com How To Install A Fan SwitchThe Wire Red TopsTwo Gang SwitchWasher 4 Prong To 3 ProngJohn Deere 4020 Wiring DiagramHow To Hook Up Electric DryerHouse Wiring Red WireCeiling Fan Light Works But Not The Fan