SOURCE: Door locks dont work
2 things I would try before replacing an expensive BCM. Disconnect your battery for 5 minutes or so, then reconnect, and see if that helped at all. I have heard in some cases it worked successfully. If that doesn't cure it, I would go to the plug on the BCM itself, (with battery disconnected) and pull the plug off, inspect it, and clean it & mating pins on BCM very thoroughly with contact cleaner or similar electrical cleaner. Add a little di-electric grease to connection & put it back together nice & tight & see what happens. The BCM is usually located on passenger side in kick panel area,(by right foot when sitting) either behind kick panel or above it.
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 Grand Caravan
Actually this sounds like the actuator inside the door is to blame. Basically a small motor/gearbox assembly tied to the door lock mechanism. I had one die under warranty. Same symptoms you described. The dealership changed it, charging 0.2 hours of labor against the warranty. Basically, remove the inside trim panel from the door, unbolt/disconnect the old actuator, and install the replacement.
SOURCE: 2008 Grand Caravan won't start. The lock/unlock
Check see if crank fuse blow / also check see if any thing around battery could be louse /you may need to test wire at starter is getting power when key is in start position/ large wire should always have power / small wire only when key is in the start position. should you have any further questions feel free to ask we are here to help Thank You .
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