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I swapped a couple switches for a caseta dimmer and pico remote but the light just remains on! Press and hold the off button but no green leds.Both boxes just have a single cable. One box has a neutral gang but the other box does not. I tried the dimmer in both boxes with the same result.So is the problem with neutral or is the LED fixture the problem (integrated bulb)?Thanks,Jon
Sounds like you have the old "California" three way. Easiest solution is to call an electrician to figure it out. Others here can do a better job of explaining how to decipher the wiring.
If you have a single cable in both boxes, there is another switch (maybe more) somewhere. If the lights are switched from 3 or more locations. There is a 3-way switch at either end and 4-way switches in the middle.
I had the same issue listed here. Each box had two black wires and one red. Issue was one switch was hot and controlled the connection to the second switch. I am not an electrician but I connected all three together at the unpowered end and then connected the two black wires to the dimmer. I capped the red off and the whole system then worked.
Did you cap off 1 red in just one of the boxes, or did you cap both the red wires in each box?