I have a light at the bottom of a staircase with a single switch at
the top of the stairs. I want to make this a 3 way setup, adding a
second switch at the bottom of the steps.
The current switch has only 2 wires going to it so I'd assume that the
power is going directly to the light.
Can someone provide a wiring diagram for converting this to a 3 way.
You can't do it without either replacing the cable from the fixture to the
existing switch to something with 3 conductors (plus ground) or
converting the switch wiring to a signal circut and using a relay.
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