Originally Posted by Stratmando
Yes the 4 way has 4 connections(wires), 2 go to 2 screws of one three way, and the other 2 wires go to other 3 way.
Only 1 3 way gets power to common screw, the other 3 way common screw goes to light.
Whites and grounds all get connected at all boxes(not to each other)
Where power comes in with 14-2 hook the power to common screw of first 3 way. red and black of 14-3 go to other 2 screws, red and black from first 3 way, connects to same colored screws of 4 way, connect the other red and black to other 2 screws on 4 way.
Now at the last switch, red and black hook to 2 same screws on 3 way.
Then with lights run to last switch, hook light hot to common and the red and black to same 2 screws on this last 3 way, and the lights white to white.
You don't have enough wires for a constant hot for recepticle downline from last 3 way.
You could hook a recepticle downline, just tie on to the light wires, however it will be 3/4 way switched with light.
It is best to run lights to last 3 way. Good Luck.