Now I'm a pro, but a handy DIYer can handle this task, too. Below, I'll show you the most common way to wire a 3-way switch. It's what most electricians use today, because it's easy and saves money.

Do this for both the black and red plugs and then do the same for the other end of the wire, if installing on both ends. Step 3: Put the outer casing of the plug back on and screw it tight.