Started not working on only the left rear door, now they all do it, but seems to work inconsistently
SOURCE: Rear Door will not Lock
After researching this problem, I suspect it is the door lock actuator located in each affected door. They can be purchased online. If you also suspect this and want to fix it yourself by removing the door panel and the old actuator, then installing the new actuator, test the locks, then install the door panel. Or for more detailed information, go to this website for a how to with pictures and written instructions. http://www.ford-trucks.com/user_gallery/displayalbum.php?&albumid=12198
SOURCE: Power windows and door locks sometime works.
time to take it to a shop, you need a new power window motor regulator :(
SOURCE: Rear door dosn't lock
the problem is the lock actuator . it needs to be replaced and its no easy job
You are on the right track.
Door panel is easy to take off. you need a screwdriver and a panel popper (or if you don't have one carefully pull the panel off with your hands, you may have to get new panel clips) ,they are cheap so no big deal.
SOURCE: 2000 Ford Focus electric locks/acuator failure recurring problem
I would follow their recommendation as I had the same problem with my car. They unhooked the power to that door and it was fine. The problem was a short in the wiring in the door that was causing the problem. So maybe get them to check the wiring in the door as well.
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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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