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Thread: Mysterious malfunction

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    Default Mysterious malfunction

    Subject: 2006 Town Car

    The wife was telling me during dinner the wipers on the Town Car came on magically today while she was driving. They wouldn't shut off. She stopped for an errand and they shut off when the car shut off and did not come back on magically when she returned to the car to come home.

    Great, I'm thinking a short somewhere or possibly a bad multi-function switch.

    Following dinner, I proceeded to take out the garbage and heard this thump-thump in distance. I went to investigate and found the Town Car sitting in the driveway with the wipers cheerfully running. The radio was on as well.

    I returned to the house to get the keys and a flashlight. Looking in the owners manual, I located the fuse for the wipers and that successfully stopped the wipers. I had to pull the delayed accessory circuit breaker to get the radio to go off.

    I'm not even sure where to begin.

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    Is there any chance that thing has rain sensing wipers that were heretofore disabled?
    Mike Martin

    1997 Mark VIII LSC 5.0
    2001 Dodge Dakota

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    Well that sounds interesting... Hope you don't have to pull out too much hair trying to figure this one out!
    -Bryan-
    1998 Mark VIII LSC - 1990 Thunderbird SC 5spd - 2005 Explorer Limited 4.6L - 1995 Taurus LX 3.8L - 2003 Taurus SEL 24V - 1988 Kawasaki EX-500

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    It's possessed

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    It doesn't have rain sensing wipers.

    I took the easy way out and dropped it off at the dealer. It needed service anyways.

    We'll see what the diagnosis is and go from there. My thoughts is the Lighting Control Module is suspect?

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    whatever controls retained accessory power (RAP) would be suspect as well.
    1996 Lincoln Mark VIII LSC Opal Opalescent on grey
    1995 Lincoln Mark VIII LSC Indigo Lights on black
    2002 Ford Focus SVT Sonic Blue on black

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    Apparently, the car was struck by lightning.

    I received a call from the service advisor and after he almost gave me a stroke with the rundown of the estimate, I had him email me a copy.

    Customer states WIPER BLADES AND RADIO COMES ON THEIR OWN - EVEN WITH CAR OFF AND LOCKED *INTERMITTENT
    ISSUE* ----- TECHNICIAN VERIFIED CONCERN. TECHNICIAN TESTED WIPER MOTOR AND FOUND INTERNAL SHORT IN MOTOR. FOUND WIPERS STUCK ON HIGHEST SETTING DUE TO INTERNAL SHORT IN MULTIFUNCTION SWITCH. TECHNICIAN TESTED RADIO AND RADIO TESTED OKAY. TECHNICIAN INSPECTED GROUNDS AND WIRES AND FOUND LIGHTING CONTROL MODULE SHORTED
    I guess my question is how does something like this happen? Three individual items shorted out simultaneously?

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    How can there be a short in the wiper motor if the motor still works?

    Bill
    1994 Deep Jewel Green 183,142 miles
    1997 White LSC 135k miles
    1998 White Collectors Edition 175k
    1994 Black (#2) 100k miles
    1993 Deep Jewel Green Convertible

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    Quote Originally Posted by billcu View Post
    How can there be a short in the wiper motor if the motor still works?
    I wondered the same though I am aware of the translation that often occurs between the tech and the service advisor. I'd really like to talk to the tech that worked on it.

    I can *almost* believe the Lighting Control Module going bad but I think they may just be throwing parts at the wiper issue because I know from experience the lengthy troubleshooting charts involved with the wiper system. I'm just not convinced it's coincidence that the two separate systems failed independently at the same time.

    I think I'll just get my complimentary oil change and hope my Lincoln "Owner Advantage Rewards" balance covers whatever diagnostic fees there may be and bring the car home for repairs. Tammie will just have to suffer and drive the Navigator for a while.

    It looks like I'll be getting intimate with the EVTM and service manuals for the Town Car in the near future.

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