05 caravan passenger power sliding door will lock but not open

It's possible. But does the lock seem like it is already in the lock posistion? It gets stuck as kids and people put there hands on it. A flat head could unlock it. There's also one other thing the locking mechanism may not be working anymore and not able to grab the bar to close it.

U will have to take the inside door cover off and manualy open it. And replace the electric door locking switch. Very common problem. Get the new lock and latch assembly from dealer,

There are contacts in the door jam, first check and clean these contacts. If they seem fine, and you have a way to check for power on these, test and make sure they supply voltage with a volt/ohm meter. If you are getting power through the contacts, that only leaves the lock actuator itself as being faulty.

If neither the lock or unlock works, first check the power lock fuse(s). If the fuses are good, then have the relay tested. You can call your dealer to find out where these components are located on your specific vehicle.

if all the doors lock and unlock except the one sliding door then the right rear sliding door locking motor has gone out.but if both the back sliding doors did not unlock it would be a door unlock relay.

I assume it has power locks, so I would look inside the door for a bad door lock solenoid or linkage rod is off. If it is not power, I would look for a linkage rod being disconnected or broken

Replace the wire harness/track assembly in the lower door opening. It plugs in behind the B pillar and runs down through the trough to the door. They have a history of failing with all the movement they encounter with the door opening and closing.

i have replaced many sliding door lock actuators on these vehicles..dealer part..mostly on passenger side sliding door..also possible you have a broken wire in door track harness..follow wiring from door into what looks like a plastic chain in door track at door opening

the reason the locks dont work more then likely there is a code stored in the bcm for a lock output circuit normally caused by one if not both of the sliding door acuators. even if you change the acuators the locks still will not work until the code is cleared.