Light Switch Wiring Diagrams - Do-it-yourself-help Wiring Two Switches for Two Lights. Here two switches are wired in the same box to control two separate lights. The source is at the switch box and a 2-wire cable is run to each light. One source is spliced to each switch with a pigtail to power the two lights. Wiring a light switch? Here's how. - Easy Do It Yourself Wiring a light switch with the power coming from the light(s) to the switch is probably the easiest way to wire a switch. If you have the chance, wire your lights this way as it is the easiest scenario.