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. This 12 volt kit upgrades the towed vehicle's cigarette lighter socket to 12 volts by connecting direct to the towed vehicle's battery. First, attach the mounting bracket to a convenient location in or under the towed vehicle's dash. Attach the 12 volt receptacle to the mounting bracket. Attach the wire extension to the 12 volt receptacle and route through the firewall of the vehicle. Attach the black wire to the negative post of the vehicle battery. Attach the white wire to the inline fuse and connect it to the positive post on the vehicle battery.