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. Light Switch Wiring Diagram - Easy Whether you have power coming in through the switch or from the lights, these switch wiring diagrams will show you the light. Light Switch Wiring Diagram (Single Pole) This light switch wiring diagram page will help you to master one of the most basic do it yourself projects around your house Light Switch Wiring Diagrams - Do-it-yourself-help Multiple Light Wiring Diagram. This diagram illustrates wiring for one switch to control 2 or more lights. The source is at SW1 and 2-wire cable runs from there to the fixtures. The hot and neutral terminals on each fixture are spliced with a pigtail to the circuit wires which then continue on to the next light. Wiring a Basic Light Switch Diagra - Electrical Online Wiring a basic light switch, with power coming into the switch and then out to the light is illustrated in this diagram.