I'm thinking it's the master valve, as when all the locks funtion, everything unlocks, including the trunk. I can't even use the key to unlock it, because I do not have the square headed key.
When I pulled up the master lock really hard, then all the loks opened. In my infinite wisdom, I wanted to see if they all would lock. They did, and now they will not unlock. I should have just left well enough alone and left it unlocked. Oh well nothing in the trunk needed except spare tire and jack...
None of the locks, except for the fuel door are locking and unlocking with the master.
All locks will pull down when the master is locked, but you have to manually unlock the rest of the doors.
Also, when I test the vacuum keeper, it holds vacuum. The locking curcuit does not. I know it's on the locks some where....