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Thread: VicCrownVic's 1998 Mercury Grand Marquis LS

  1. #101
    Wagon Addicted Tiggie's Avatar
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    Mar 2006
    Location
    Bedford, VA
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    5,631

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    Sounds like broken wire syndrome.

    Nice score on the driveshaft. Been looking for years. They all get bent here.
    1988 Crown Vic Wagon - daily
    1990 Country Squire - weekend cruiser, former lawn ornament
    Other: 95 Ranger, 74 F250, 68 Mustang, 94 Mustang
    Sold: 1982 LTD and 1987 Crown Vic

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  2. #102
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Nov 2012
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    Shelby Township, MI
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    After looking over the EVTM, I think the most reasonable explanation is a "broken leg" in the driver door pass-window switch. This would cause both directions to not work from the driver door and only one direction to work from the passenger door.

    I checked this switch for power, which looked right. Not knowing the circuit well enough, I didn't check when each leg goes to ground. Now that I know, I'll specifically be looking for the T/LB leg to be going to ground at rest and in the up position. I suspect I will find open loop to ground. I guess I'll most likely have to make another JY run for a driver door switch.

    I couldn't believe my eyes when I saw that driveshaft. Same thing always happens here; the loader always mangles them. I looked it up and down, spun it around and found nothing more than a scratch. BTW, I didn't forget about the turbine lug nuts, there was only one box, a TC, in the yard. My JY list in my phone still has that note to self.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - My rotting winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  3. #103
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
    Join Date
    Nov 2012
    Location
    Shelby Township, MI
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    3,124

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    EVTM pointed me right to the problem. I found two pins with corrosion and one was indeed the T/LB wire.

    Second and third down on the left.


    Cleaned those up with the a dremel wire wheel and removed the female ends from the connector block to clean them. Now the p-side front window works in both directions from both doors.
    Attached Thumbnails Attached Thumbnails IMG_20200531_131110150~2_compress14.jpg  
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - My rotting winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

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