The breakaway system actuators will apply the trailer brakes if the trailer becomes completely detached from the tow vehicle while under power. Failure to properly connect the breakaway system prior to towing may result in serious injury or death and/or property damage. The breakaway cable is a line of defense at separation. Before the breakaway cable is pulled, the coupler must become detached from the hitch ball and the safety chains must fail. At this time the break-away cable is pulled and applies a braking force to the trailer. Note that the breakaway system is not intended to lock up the trailer brakes after separating from the tow vehicle but rather to apply just enough braking force to keep the trailer from free-wheeling.