Motorhome brakes were not designed to stop the added weight of a towed vehicle. RV'ers towing a vehicle need BrakeBuddy, the best selling auxiliary braking system that shortens the overall stopping distance and keeps them legal with all North American towing laws. In the event that your towed vehicle separates from your Motorhome, the steel cable pulls the receptacle out of the junction box. This activates your BrakeBuddy which brings the towed vehicle to a controlled stop. The brakes will continue to be applied until the receptacle is reconnected to the junction box.