Good explanation: I thought about that before reading your post
and couldn't figure out how to describe it other than provide a
link to a diyer site; which I also can't remember! G Good
post.

Pop



"RBM" rbm2(remove wrote in message
...
: If you disconnect all six wires, at one of the locations you
will have one
: hot wire. It is the common on that side and the two travelers
go to either
: of the other screws. After you connect the wires on that
switch, check the
: three wires at the second location. One will now be hot. It is
a traveler.
: Flip the installed switch to the other position. You will now
have a
: different wire that is hot at the second location. It is your
second
: traveler. The remaining wire is the common which goes to the
light
:
:
:
: "Steve" wrote in message
: . 142...
: I have 2 3 way swithces off from a 75 year old house. All
three wires are
: black, and I don't know which one is the common wire. Is
there any way to
: find out? And does it matter which screws the other 2 wires
are attached
: to if you have the correct common wire? Right now I have it
hooked up and
: it works on both switches, sometimes..
:
: