How To Set Up A 3 Way Light Switch. NOTE: You can click on the I'm not sure link at the bottom to provide more information on how to determine. There may or may not be a marking indicating which way is up.
Don't put up with old three-way light switches like this. With a three-way dimmer, you can control a light with two switches. The source in this circuit is at the first switch and the Use a continuity tester or multimeter on the Ohms setting to determine if it's conducting electricity properly.
They also allow you to set them to.
Wemo Light Switch lets you easily set automatic schedules for any light.
How to install a smart light switch. Here's how to swap outdated three-way light switches for something much better. With a three-way dimmer, you can control a light with two switches.