Need Help with Vacuum locks
 

By the Numbers, I have never had to work on these before.
syptoms:
all doors will lock with drivers door but not unlock.
Front Passanger door will lock itself
trunk will not open without a key.

the only other Vacuum problem that I have noticed is no air blowing out of center vents. related?
this is on an 84 300D(cali) with just shy of 151k.
I need trouble shooting help with exact locations of parts.

could be anything. you should buy a 'mity-vac' to trouble shoot your vacuum system though. my doors wouldn't lock or unlock as there was a vac hose that managed to fall off the tube going to the pod that opens closes the fresh/recirc vent. after you get the mity vac then you can start to test different things and eventually you should get it...could be the a trunk leak, could be a fuel door........could be a pod, could be the valve behind the driver's door panel that tells all the other door locks to do........sorry so vague