The wiring is very straightforward. On the rear lights, there are two wires from each LED module; these connect up to an LED control module. This control module has three other wires, that connect to the bikes tail light, brake light, and ground. The front lights are the same, just with two wires to connect to - switched power and ground. The only challenging part to the install is actually getting your hands into the area behind the brake light on the bike to access the wiring. Let’s just say it would help to have small hands.