Light Switch Two Red Wires One Black. The new switch has red, black, green and yellow wires. Those two wires go to the switch and the blue-red wire goes to your lamp.
Wiring in the switch is a easy task for a DIY type person but be sure to call a professional if in doubt.
The black wire is the hot wire that leads to the switch.
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The pigtail gives you two hot wires instead of just one. The first time I saw a red wire on a light switch, it certainly confused me. Light fixture has two wires (black and white) + ground wire.