Commonly used to control the inflation & deflation of air suspension bags.
Manual mode allows for movement of the trailer without re-inflating the air bags by inserting the 0361 Breather Plug into the Pilot Port (do not use sealant on the Breather Plug – Pilot Port must never be plugged)
Auto Reset mode resets valve to fill air bags when trailer parking brakes are released by not using the Breather Plug & connecting the supply line to the Pilot Port