All windows work, except drivers side (when locking or unlocking with remote) driver side will not unlock

SOURCE: Sliding door lock

If you check the doorlock actuator it is more than likely bad. On my caravan I had to replace actuators on both sliders. Cannot get correct actuators at autoparts stores. Either go to a salvage yard or to the dealer to get them.

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: 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: Keyless Entry won't Lock/Unlock back door

Factory keyless?

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.