Need a wiring diagram for 4 way switch with source in centre and light on end

I currently have two lights in my porch at either end that are both controlled by separate 3 way switch circuits. At the middle door it a double box with the supply and two 3-way switches, from each switch is a 14-3 wire to another box on opposite ends of the porch with another 3-way switch. From those switches is a 14-2 to each individual light.

How would I go about only having 3 switches and turning both lights on at the same time, or in other words i want to tie the two lights together and be able to turn them on/off from any one of 3 switches. I can easily go into the attic and add a wire between the two lights, adding a wire between boxes gets into drywall work.

Similar to the image but the light would have to be off either one of the 3-way switches in the diagram.

• Can you post photos of the insides of the existing boxes? Commented Feb 23, 2017 at 3:35
• I have created an illustration that I believe matches your descriptive text. Please let me know if I'm wrong. Commented Feb 23, 2017 at 6:38
• Yes That is the way it is wired now, the answer below is exactly what i was thinking will work. I found the original picture I linked and knew it was close, once I slept on it I realized how to do it by wiring the 3-way switch that supplies the light the "normal" way or same way it is now and by using the white wire to supply power to the other 3-way switch first. Once I woke up I thought i had it figured out but it is always great to have someone else agree and especially to see it in picture form. Thank you very much. Commented Feb 23, 2017 at 12:47

Making the connection in the attic saves you

Here's what you can do with existing cables in wall.

The black-red grouped pairs are messengers. On 3-way switches, "C" marks the common.

Smart switches

That's the sure way to do this thing, but it's a little complicated. In this case you re-task red as a signal line (as needed by the smart switches).

• Yes the picture you edited in is the way it is wired now, your answer below is exactly what i was thinking will work. I found the original picture I linked and knew it was close, once I slept on it I realized how to do it by wiring the 3-way switch that supplies the light the "normal" way or same way it is now and by using the white wire to supply power to the other 3-way switch first. Once I woke up I thought i had it figured out but it is always great to have someone else agree and especially to see it in picture form. Thank you very much. Commented Feb 23, 2017 at 12:49
• Is there a program or website you used to create that image or is it a "Paint" type drawing? Commented Feb 23, 2017 at 14:02
• @M.Blyth Adobe Illustrator CS5 and some clip art I had laying around. For what I do, CS2 would suffice. Commented Feb 23, 2017 at 14:39