Houses wired with plastic sheathed cable almost always have bare copper ground wires that you ll connect to the toggle dimmer switch.
Dimmer fan switch wiring.
Wiring a replacement dimmer switch.
How to wire a ceiling fan with a dimmer switch 1.
Switch off the wall switch as well.
New dimmers have either a green grounding wire or a green ground screw that you ll have to connect to a grounding source if one is available.
Eric the concern here is that you will need a speed control switch that will be rated for both ceiling fan motors.
If a rewired switch is causing a circuit breaker to trip there is most likely a dead short between a neutral and hot wire a dead short on the wire to the light fixture or two separate circuits are wired to the same light switch.
Further pairs connect the wires to the dimmer switch wrapped the joint with electrical tape.
Follow the manufacturer s instructions to hook up your dimmer fan switch at the switch box.
Then test the dimmer switch and if that works tight fit the unit back into the wall being careful not to twist and bend wires.
Tighten the screws holding the dimmer to the electrical box.
Turn off the power for the room with the ceiling fan at the breaker box.
Carefully tuck the wires back into the electrical outlet box.
If you locate this switch then both ceiling fans can be wired from one switch.
A dimmer switch for the lights will be available in several watt sizes.