I've got an older house, built around 1930.
There are a number of light switches that would appear to call for a 3-way switch - two switches, each on opposite ends of a hallway, for instance, controlling the same light.
However, when I removed the old switch, the wiring didn't seem to make sense. I see three wires, rather than four! The color on the wires is a bit faded, but it looks like I've got a white, black and red.
I tried several permutations - some resulted in no lights on at all, while one gave me lights, but in a unusual way. On the three way switch I have, there are two connections on the 'bottom' portion, and one on the 'top'; there's also a ground, but I'm not using it in this case.
To the top, I connected the black, and on the two bottom ones, I connected the white and red. Now, when both switches are thrown the same way, the lights go on. But, I'm not able to use both of the switches as toggles - they've both got to be the correct way, or the whole deal is blown.
Looking at the old switches, I'm wondering if they were interruptors, and not 3-ways?
So, I've got a few questions:
1.) Was there an old-school way of dealing with multiple switches back in the 1930s? Were 3-ways not around, or not in use then?
2.) Is there a way for me to safely make use of a true 3-way in this situation - without rewiring my whole house?
3.) Is it possible to make use of an interruptor, or some other type of switch?
Any help on this would be most appreciated.