Power to Switch Box #1, Switch Box #1 to Light, Light to Switch Box #2
In the following diagram, we show power entering switch #1, from switch #1 to the light, and from the light to switch #2.
In this case, you will need a 3-wire from switch #1 to the light, and the light to switch #2.
NOTE: This diagram is a thumbnail. To view it in full size – click on the diagram.
Watch a Video Explaining 3-Way Switches