Currently I have two independently powered switches powering two lights. The dining room is a single pole switch controlling the light. The kitchen used to have two 3-way switches controlling the light prior to removing a wall. After removing the wall, I just capped the old 3 wire in the basement so the remaining 3-way switch is the only control of the light. What I'd like to do is have both existing switches turn on both lights simultaneously but I'm not sure how to (or if I can) accomplish this.
Here's a rough text diagram of the current set up
Dining room: Feed ----- single pole switch ----- light
Kitchen: Feed into light --3wire ---3 way switch --- 3 wire -- terminated in junction
One thing that seems odd to me is that there's a 3 wire from the light to the first (and now only) 3way switch. Let me know if this makes sense.
The black coming into the hall switch is what provides power here. I think it I tap into the red wire coming off the top of the 3way switch and a neutral, I can pass that power to the dining room light.