Did you read Hound's post?
The dump valve is the "actual emergency" failsafe cutoff for the cruise system. In the event that the electronics don't successfully disengage cruise, it will ensure the servo lets go of the throttle.
The dump valve is the "actual emergency" failsafe cutoff for the cruise system. In the event that the electronics don't successfully disengage cruise, it will ensure the servo lets go of the throttle.

