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ubonline 06-06-2010 06:46 PM

help with 3 way wiring
1 Attachment(s)

Hi, I'm replacing a set of 4 switches and I did something wrong and now the lighting is all messed up. See attached for a diagram. The 2 switches on the left are 3 way (and the matching 2 switches on top are fine, I did those first and it all worked until I replaced the set of 4). The 2 switches on the right are simple 2 way. No matter what I try, at least one of the 4 doesn't work properly, and now I'm so far from the original wiring I don't know how to get back. Any help is appreciated.

Also, the 4 white wires are tied off together in the back.

ubonline 06-14-2010 01:27 PM

1 Attachment(s)

OK, sorry for the delay, let me try to be clear.

In the new image attached it shows the room set up, box of 3 on top, box of 4 on bottom. All were pre-existing and worked fine, I just replaced the 7 switches (they were old & nasty & wrong color for room). I tried duplicating exactly what was already there but obviously did something wrong when wiring the switches.

After replacing the box of 3 on top first, all worked fine, so those must be wired properly.

For the box of 4 on the bottom, the 2 on the left are 3-way, the 2 on the right are 2-way (I used all 3-way switches because that is what was there).

To the best that I can tell, each switch has its own group of 3 wires (red, black, white) coming from the back of the box, with all white wires tied together and covered with a plastic cap. I didn't create the setup, and its worked for the 8 years we've lived in the house, so it must work if wired properly.

So, the questions:

1-Must I replace the two 2-way switches on the bottom right with 2-way switches, or can it be wired using 3-way and just leave one post unused?
2-How do I wire the 4 black and 4 red wires coming from the bottom?
3-How do I connect the 4 switches in sequence?

Thanks for all your help.

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