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I have a light controlled by two "three-way" switches. It has worked properly for many years. It started getting a little flaky. I noticed that one of the switches needed to be pushed up a little harder for it to work. I replaced that switch (I checked the continuity of the old switch, and it was flaky). I got some of the functionality back, but not all. Then I pulled the other switch and it was bad as well. I replaced it and still did not get total function back. So, I pulled both switches off, and with no wires connected in either box and with the power on, found power going to each of the switches. I am baffled at how this could ever have worked. Is there any explanation other than I have some sort of short in my wiring?

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    And you're sure you did not confuse the common with the travelers? That happens a lot befause people expect screw position to be not different on every switch... – Harper Jun 29 '18 at 23:43
  • What did you "find power" with? False positive from a non-contact voltage tester?. If it worked fine before, there's a 99% chance you messed up the travelers - partial functionality is indicative of this. – Mazura Jun 30 '18 at 0:32

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