The small pin that sticks out of the switch drops into a slot machined into the valve itself and locks the valve in the fail over position...
Some switches have the tip of the pin rounded off when manufactured,,,which will allow the pin to be forced back over the lock groove if the pedal is stomped on hard enough...
I have always felt that removing the switch takes only a few minutes and allows the valve to center itself again with only a light application of the pedal.
There is no chance of any fluid loss...
I have had vehicles come to me with the brake dash light stuck on...removing the switch usually show the tip of the plunger snapped off...new switch will fix it every time.
These bias switches are a necessary item and should not be omitted or disconnected...they are a quick alert to a failed brake fluid circuit.
