How to Install a 3-Way Switch

Convert an existing two-way switch to a three-way switch and run new wire to the second switch location.

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

  • Clamps
  • 4-in-1 screwdriver
  • Corded drill
  • Needle-nose pliers
  • Drill bit set
  • Electrical tape
  • Hacksaw
  • Non-contact voltage tester
  • Utility knife
  • Wire stripper/cutter

You'll also need a fishtape. And, if you need to run the cable through finished walls, you'll also need tools for patching and painting the holes in the walls.

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • 14-3 or 12-3 cable
  • Three-way switches (2)
  • Remodeling boxes (2)