The switch comes with wiring diagram. you can also get wiring diagram in descriptions and photo. Cable length:37″ (950mm). 3 function signal switch for 24V 36V 48V Scooter, Switch Functions: Headligh Button( Self-Locking Switch), Turn Signal Light Switch(Slide Switch), Horn Button(Press-on Switch) Fit for 22mm(7/8″) Handlebar,will fit most scooter go kart pocket Bike Product description 3-function switch assy fit for Spotlight Scooter Electromobile Moped, with 37″ (950mm in millimeter) length cable. The Switch fits all scooters / motorcycles / Bikes with 22mm or 7/8″ Handlebar. Switch Functions: Headligh Button( Self-Locking Switch), Turn Signal Light Switch(Slide Switch) Horn Button(Press-on Switch) The switch is with 7 cores wire. Please see photo for Wiring Diagram: Horn button: 2 white cores Lamp button: 2 blue cores Left Signal Switch: yellow, red cores Right Signal Switch:green, red cores Package includes: 1 X 3 function signal switch 1 X Wiring Dia