For connection of reverse lights on newer cars that lack a 12V positive signal or have a pulsed signal (PWM). Finally, there's an opportunity to install additional reverse lights on cars that lack a 12V positive signal. The Canbus module reads the reverse signal in the car's canbus system and converts the signal to an analog 12V positive signal. Additionally, an extra light wiring kit is needed to illuminate the reverse lights. The module is connected to the Can Bus wiring inside the car's cabin.