Hi,

I have 3 lights in my garage controlled by a single switch. The wiring goes from the switch box to the first light in the center of the garage. From there, two wires run to two more lights. How would I add a switch so the first switch controls two of the lights and the second switch controls one light. I have access to the attic space above the garage and can get to all the wires. My house is 10 yrs old. I'm guessing this is pretty simple, but some detailed instructions would be much appreciated. Thanks.

Second Light
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First Light---------------Switch
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Third Light

 

Tell us where power enters the picture and we'll go from there.

 

Hi,

Power enters at the switch box.

Second Light
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First Light--------------Switch-------power-------CircuitBreaker
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Third Light

 

Where do you want to add this new switch?

 

In the same switch box, right next to the current switch.

 

Replace the cable from the witch to the first light with with three conductor cable (plus ground).

Add the second switch, use the red wire for the second switched hot, make the changes at the first light.

 

Some of the details depend on which of the three lights you want to be separately switched.