I helped a friend with his 3-way switches today. He has two 3-way
dimmers that used to work to dim one light. He removed the one light
and added six recessed lights, but all should work the same.
Unfortunately now neither of the dimmers work, and each light switch
only functions if the other is in the opposite position (e.g., switch1
only functions if switch2 is down, and switch2 only works if switch1
is up). I followed the following diagram at:
http://www.homeimprovementweb.com/in...ch-option4.htm
and it is wired accordingly. The only difference is that it is an old
house and there are no ground wires. The switches also aren't labeled
with "common", but it seems obvious that the odd-colored screw is the
common...and besides, it worked before and the only wiring we redid
was at the light (where the power enters as well). Any clues?