I have a light that is controlled with 2 switches. I want to control it with a smart switch, so I bought a "3-Way" smart switch, since that's what the online guide said to get.
The switch I received has 5 cables: Neutral, Live, Ground, T1, and T2.
I opened up the socket to replace the old switch, and found that it was only connected to 3 cables: a white, a black, and a red. I'm not sure how they're wired. I foolishly did not record what was connected to where when I took out the switch, but I THINK the white was connected to a slot labeled "common" on the old dumb switch?
I tried connecting black to "Live," white to "Neutral," and red to "T1". When I turned on the breaker, my smart switch powered up! Great. Except when I told the switch to... well, switch - the light stayed off. I tried using the other of the two switches to manually turn on the light, and it instead killed power to my smart switch, and the light remained off.
What should I connect to where? I have pictures of the switch I want to replace and the other of the 2 switches (which I'd prefer to not replace, but can if it's the only option).
First picture: switch I want to replace Second two: switch I would rather not replace but controls the same light. One of the cables on this switch appears to be running into the back of the other switch in the gang box, which controls a separate light (and is the only switch that controls that light).