Originally Posted by Curmudgeon
"locking out" the actuator only disbles the brake in reverse.
Uhhh, I believe 'locking out' the actuator also disbles 'normal' actuation of the surge brake system, which is what he wants ...
Yes, I stated that wrong. Fingers moving faster than brain.
However, if the brakes are dragging, locking out the actuator will not stop the dragging. The OP will have to find the cause of the dragging and correct it or remove the offending part(s).