Getting deeper into smart house improvements with my SmartThings and glad to have found these forums.
I’m not new to electrical work, having wired rooms from scratch and wired in sub panels to outbuildings, but this one has me scratching my head.
Have a hallway with 2 overhead lights (red C and D in diagram) in it with a 3 way wall switch at each end. The (black/white/ground) line comes in at the south end wall switch. See attached drawing.
When I hook up the primary GE smart switch at that south end switch box where the power comes in (red A in diagram) and out with the 3-wire (red/black/white/ground) the way I’ve done all the others successfully in the house (minus the red wire so it functions like a single switch to try to figure out what it controls) it controls power to the wires at the north end switch location (red B in diagram) and sends no power to either of the overhead lights. Flipping the smart switch on actually does nothing with either light but sends power to the other switch. The lights worked with the traditional 3 way switches hooked up as you’d expect.
Any input would be great. This has me quite confused. Wish I could see through the drywall.