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Thread: Anyone replaced/programmed a Driver's Door Module on a Town Car?

  1. #1
    Kaysboat Kaysboat's Avatar
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    Default Anyone replaced/programmed a Driver's Door Module on a Town Car?

    I have a weird problem on the 2007 Town Car I have narrowed down to a faulty driver's door module. When I parked the car, there were no issues, but when I started it up the following things didn't work:

    1. Keyfob locks and trunk release
    2. Driver's seat
    3. Power mirrors
    4. Dome light does not come on when door opens

    I'm fairly sure it's a faulty driver's door module, and can get one off ebay and replace it no issues. But, I understand they need to be programmed. Does anyone have any experience with that, or know any other info about these I should know (beside buy the exact part number replacement)?

    Thanks.

  2. #2
    Beater gonna beat sly's Avatar
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    You should check the grounds under the driver side of the dash and kick panel and the fuses first to rule out a bad connection or blown fuse causing your trouble.

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  3. #3
    Southern
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    Ah yes. I'm all too familiar.

    Yes, all of these items do come back to the Driver Door Module.

    For your car, you can use any Driver Door Module from any 2006-2008 Town Car. Keep in mind a 2008 Town Car will have TPMS enabled, so it'll start whining on the dashboard about that if you get one from a 2008. You could get one from a similar era Crown Vic or Grand Marquis but will probably be missing functions.

    If you have a laptop and a obd2 adapter, you could use ForScan to validate inputs/outputs from the box to make sure everything is otherwise OK.

    2003-5, and 2006-8 Town Cars do have flakey door modules - usually with solder joint failures inside the plastic box. Constant door slamming plus cold temps don't give them great durability.
    -Nick M.
    Columbia, SC

    66 Squire, 89 Colony Park, 90 TC, 03 TC, 06 TC, 07 TC (2x)
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  4. #4
    Stow It! GM_Guy's Avatar
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    With all those functions down, wiring/grounds as Sly suggests. Unless the towncar is different, power seats is just a switch on the door panel and doesn't communicate with the ddm, same for power mirrors.

  5. #5
    Kaysboat Kaysboat's Avatar
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    Humm, ok. Thanks for the info on the parts.

    Yesterday, the functions started and stopped working randomly (basically every time I opened and closed the door). Fairly sure it's a bad connection. TechNical, I assume the solder joints you were referring to are internal to the box and can't really be fixed?

  6. #6
    Still Wrenchin'! friskyfrankie's Avatar
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    The joints can be fixed if you are adept with a soldering iron. I would also check all the wiring harnesses going into the unit especially the ones going through the rubber cover going into the door. That last part may take some doing.
    What I Own: 1993 Mercury Grand Marquis GS
    What I Help Maintain: 1996 CV / 1988 CV / 1988 Tempo

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