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 Diagram Turn Signals and Brake Lights | autocardesign Wiring Diagram Turn Signals and Brake Lights– wiring diagram is a simplified standard pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the skill and signal friends between the devices.