Front doors lock fine but rear passenger door will only lock manualy
Check the wiring harness into the rear doors - they tend to get crimped and break the wires
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: rear door power lock--1996 Dodge Ram van (Roadtrek)-- won't open
Check all of your dash fuses inside the glove box if these are fine. Remove the door panel nd check to see that the wires have not come loose they tendto come loose from closing the rear door.
SOURCE: 2004 dodge ram truck door lock will not open from
You have to pull off the inner door panel and reattach the lock mechanism
Testimonial: "That did the trick-Thanks Brother!"
SOURCE: 1999 Dodge Ram 2500 changing front-to-rear hydraulic brake line
It will be a lot easier to do with the bed removed. It will also save time. So unfortunately yes that is true.
SOURCE: 2004 dodge ram 4dr window switches wont work on
If the window lock-out swich located on the drivers side door master switch is in the off or un-lock position, then the problem will be a broken wire or wires in the weather boot that runs between the door and the body of the vehicle. Any broken wires that you find should be repaired by soldering them well, use the same gage wire to lengthen any broken wires in order to successfully solder them, and do not use wire connectors if you want the connection to last.
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Passenger front door lock switch
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LH rear door lock switch
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RH rear door lock switch
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LH middle door lock switch (w/ V4U)
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RH middle door lock switch (w/ V4U)
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Driver door switch assembly (DDSA)
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Driver door module (DDM)
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Passenger front door module (PDM)
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LH rear door module (LRDM)
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RH rear door module (RRDM)
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Left middle door module (LMDM) (w/ V4U)
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Right middle door module (RMDM) (w/ V4U)
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Driver door lock actuator
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Passenger front door lock actuator
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LH rear door lock actuator
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RH rear door lock actuator
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LH middle door lock actuator (w/V4U)
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RH middle door lock actuator (w/ V4U)
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Driver door cylinder unlock switch
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Rear integration module (RIM)
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DRVMDL fuse (10-amp)
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PASS MDL fuse (10-amp)
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RRDR MDL fuse (10-amp)
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Class 2 serial data link
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The driver door module (DDM)
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The passenger door module (PDM)
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The rear door module (RDM)
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The LH front power door lock switch
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The RH front power door lock switch
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The LH front door lock actuator
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The RH front door lock actuator
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The LH rear door lock actuator
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The RH rear door lock actuator
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The remote control door lock receiver (RCDLR)
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The power door serial data circuit
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The class 2 serial data circuit
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The DRVMDL Fuse - 10 amp
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The PDM Fuse - 10 amp
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The RRINMDL Fuse - 10 a
Class 2 and Power Door Serial Data Links
The class 2 and power door data circuits are both serial data links. The serial data circuits replace cables in the vehicle by multiplexing (time-sharing) data to and from each device over a single wire referenced to ground. If the power door serial data is lost, both the rear door module (RDM) and the passenger door module (PDM) enters the sleep mode. With the RDM and the PDM in sleep mode, no power door operations are possible.
Your best bet is to take it to the dealer or an ASE certified repair shop .
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