So then Paul and ILUVMISL? Then explain what are the wires for that plug into the air bag. And you do know they sometimes show a battery and test leads used to release the air by jumping these pins in the bag to install on some models.
So the release air function is actuated at the manifold and not the airbag? and why the audible hiss either front or rear when the system balances after parking. How does the rear bag let pressure off, which it does, At the Bag, audibly, if there is no solenoid there.