Ok thank you. Same setup I had.
Box 1 needs your master switch.
- Remove the white wire from the bundle of black wires, this will become your neutral for the Aux switches.
- Get a small wire and add that to that black wire bundle, this becomes your line.
- Get a small white wire and add that to your neutral bundle, this becomes your neutral
- Cap black wire that is in same wire as your white wire taped black, you don’t need it.
- Then hook up wires to your switch:
a. New small white wire and black taped white wire to neutral. You can remove tape if you want to since it’s no longer a positive wire.
b. New small black wire to line.
c. Other black wire from 3 way to your load, not one you capped
d. Red wire from 3 way to your traveler
You can turn back on power and test that this switch now works.
Then in box 2:
- Cap both black wires as you don’t need them.
- Hook up both white wires to Aux neutral
- Hook up both red wires to Aux traveler
Then in box 3.
- Cap black wire
- Hook up single white wire to your Aux neutral
- Hook up single red wire to your Aux traveler
You are done! Hopefully this makes sense.