3 Way Switch With 14 2 Wire. You should have three remaining wires in each box. Three-way wall switches control a light fixture from two locations in a room.
They are always installed in pairs and use special wiring connections. One switch is a Cooper over/under Duplex switch with the top being a single pole You need four wires + ground to make it work properly. Not all three-way switches have these terminals placed in the same configuration, so you have to pay attention to their colors (and the instructions that come with the package) when wiring.
A three-way switch can be used to control the fan and light individually from each location, or combined with one switch at each location controlling both functions.
The simple rule to make wiring easy is that the power leg connects to the common lug.
Three-way light switches control a light from two locations, such as from both ends of a staircase or hallway. One switch is a Cooper over/under Duplex switch with the top being a single pole You need four wires + ground to make it work properly. Look up a wiring diagram for an early/vintage Strat and you'll be sorted.