Changing A Single Switch To A Double Light Switch. If the fixtures have been wired singly on separate cables, the average homeowner can change out the switch to make the fixtures independent. You had to turn on the light at the switch and then dim it from across the room.
But as with any project involving electricity, it's essential to exercise caution. A great way to know if you turned off the correct breaker is to turn on the light switch before cutting the power. If your wall switch as three or four insulated wires connected to it rather than two, you are not looking at a standard single-pole switch, but rather a three-way or four-way switch.
If your configuration is panel/power -> fan/light -> switch box then the setup will be a little different.
You will have to add some additional wiring, as it is most likely the existing garage light control switch will just have a permenant live supply and a return switch line back to the light fitting.
Count the […] How To: Replace a Light Switch For any confident do-it-yourselfer, it's easy to replace a light switch. A single wall switch controls the power to the fan and light together, whereas a dual wall switch has two separate switches - one for the fan and the other for the light. Replace the switch cover and tighten its two screws.