Power lock drivers sliding door lock wont unlock

SOURCE: 2002 Dodge Grand Caravan Driver Door Lock/Unlock Switch

sorry not sure the 12v prob will help this swtich works on 5v off 3v unlock 1v lock single wire lock/unlock logic signals
I found wiring diagrams at
http://www.dodge.com/bodybuilder/2004/docs/wd/rswd/tc.pdf
it is 2004 but use the wiring diagrams to test the wires
(most likely to fail where they flex)
because it is using logic gates disconnect the plug at each end of the wire you are testing or the damn thing will find a few diffrent ways to trick you.

SOURCE: 2006 Dodge Caravan - ONE power door lock stopped working

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

SOURCE: 2004 Dodge Ram 1500 Quad Cab Drivers side power door lock broken

Sounds like the link rod to the latch are jammed in the locked position by something inside the door or it came off. Any way, you have to remove the door panel to get access to it.

SOURCE: 2005 Grand Caravan power door lock quit working.

The lock actuator is probably broken in that door. We got one of the internet for 80$ and replaced it outselves and it solved this problem. IOD fuse is very temporary fix as system is sensing problem and flipping to protect itself like the breaker switches in the house.

SOURCE: 2006 dodge caravan sxt passenger door sliding door won't unlock or open at all, manually or by remote

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,