When the towing vehicle hits the brakes the towed vehicle surges forward and activates a master cylinder putting hydraulic pressure on the two dolly brakes. Harder the two vehicle brakes harder the towed vehicle brakes.
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho