My husband was replacing the ceiling fan or light switch and did not mark the wires. Now all I know is I have (3) 12-2 bundles and (1) 12-3 bundle coming into the box for separate fan and light switches. I know which black is the hot. I believe the 3 bundle comes from the fixture because I can get the light to turn on but not the fan. Also, I believe it is a pass through or a 3-way. When the light is on - no power gets to the hallway switches (3 in one box) The reason I say possibly a 3 way is I do not know what one of the 3 hallway switches if for.

I was going to insert a photo but I only got the option to put an url in and not browse on my computer?

Desperate for help,

Patricia

If it the old style switches, 3 ways have no ON/OFF, the regular single poles switches have on and off on the switch.
Since your grounds are intact, you could jump the hot to a wire that has no resistance to ground and see which is hot at the other end for identifying.
I might use my tone generator and detector to speed things up.

I assume your are saying that all these wires are in the switch box. I assume that the switch box is a 3 gang box that is to say that it has places for 3 switches. I am guessing that 2 of those switches are single pole or regular. They have On and Off stamped on the switch lever. These switches will have two screws for attaching wires. The third switch will be a 3-way switch. It will have three places to attach wires and will not have an Off or On stamped on the lever.

One of the single pole (regular) switches probably controls another light fixture. The second single pole (regular) could control another light fixture or it could be a switch for turning the fan of the fan/light on and off. The 3-way switch, along with another 3-way switch some where probably turns the light of the fan/light on and off.

Please us tell what the switches are suppose to do. You need a meter to test for voltage. If I am correct you will have voltage between the white wire of each 2-wire cable and ground.

Post back with information about switches and if you have a meter.