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  1. #1
    Junior Member
    Join Date
    Mar 2017
    Location
    New York
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    24
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    Cadillac XLR

    2005 Black XLR

    Default Trunk won’t open

    Just pulled out my 2005 XLR from winter storage. Trunk won’t open using the FOB button, dash button or the button on the trunk. I can hear the latch button mechanism working. I can lift the trunk manually. Negotiate sure what fuse to check. Can’t hear a relay “click” when I press the FOB trunk button. Any ideas out there? Thanks BobT

  2. #2
    Pit Crew
    Join Date
    Feb 2015
    Location
    Province of Québec
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    223
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    Cadillac XLR

    2004 silver XLR

    Default

    Hi BobbyT.

    If you can open the trunk lid, then open the hood for a battery check and make sure it is full charge at all times or replace the unit.
    Check for message on the instrument panel, then...
    Check for hydraulic oil level in the pump situated in the trunk LH rear side well, low level is bad….
    Check for moistures on the module next to the pump, is the well drain tube obstrue…

    If the oil level is low that mean a lost of pressures ( leaks ), and the pump can not lift the trunk lid.

    If you find some moistures on the module it could very well be the problem, as the computer ( module ) is the center of all the top and its rear trunk actions.

    Check the fuses under the hood, 7,26,29,33 they are battery sources for the related systems.
    Check the fuses inside the passenger side under the carpet, is the BCM (an other large fuse box) The fuse 22 is for the retractable top switch and the fuse 44 is for the retractable trunk latch, while you are in it, check the 8 and 32 related fuses.

    Check the auxiliary relay in the same area of the passenger side, also perhaps, the block relay in the same area

    The trunk lid sensor locate in the interior of the LH hinge could be check for its operation.

    Visit T/H site, indicated on the heading of this page, they have produce many Videos in showing the retractable top systems and its parts functions....its very cool, maybe you will find the problem.

    Give him a call, as he is the expert.

    Good luck.

    IAN
    Last edited by IAN; 03-19-2020 at 04:07 PM.

  3. #3
    Pit Crew
    Join Date
    Jun 2016
    Location
    Calgary AB / Palm Springs CA
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    269
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    Cadillac XLR

    2006 Red XLR / 2007 XLR-V

    Default

    What about the struts ? If the trunk is unlocking that's the first thing I would checked.
    John F.

  4. Likes IAN liked this post
  5. #4
    Junior Member
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    Mar 2017
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    New York
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    Cadillac XLR

    2005 Black XLR

    Default

    Not sure what you mean. If I lift the trunk by hand, it still won’t go stop by pushing the buttons. Thanks for your input
    BobT

  6. #5
    Pit Crew
    Join Date
    Feb 2015
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    Province of Québec
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    Cadillac XLR

    2004 silver XLR

    Default

    Hi BobT.

    Find enclosed some photos/images explaining how the folding (Retractable ) top and related components works.

    First the top operation, then the folding top inputs, then the 8 hydraulics cylinders and their positions, including the pump and its module. Finally the hydraulic pump oil container and the vital oil level indication.

    All the cylinders parts numbers are shown for references and the name of the supplier.

    Referring to the note send to John F the commun word '' strut '' is used for a decklid with cylinders already fill of gaz.... contrary to the hydraulic cylinders of the XLR.

    Hope this will clarify the know how the folding top works.

    Oregon is for sure faraway for the repair of your XLR, however a New York area Cadillac dealer could have the solution.
    Your choice of an experience dealer that have sold many XLR could strongly help, usely they have the trained staff, the tools, the parts and a warranty, also a repair shop Cadillac/Corvette that have the same knowledge could help.

    Good luck

    IAN.
    -fold-top-jpg-a1-composantes-pour-le-toit-ouvrant-jpg-a9-cadillacxlrdiagram-1-jpg-t-5-jpg

  7. #6
    Pit Crew
    Join Date
    Feb 2015
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    Cadillac XLR

    2004 silver XLR

    Default

    -a8-0911246y12-003-1-copie-jpg

    -s-l1600-3-jpg
    Hi John.

    You mean the black gaz cylinders that support the hydraulic system, there is 2 for the lid and 2 for the top, this represent 12 cylinders for the XLR retractable top.

    We most of the time ear only about the hydraulic repairs ones, however perhaps many hydraulic deck lid cylinders were changes for the only reason that….. they could be defectives.

    Enclosed are the drawings were these cylinders ( black painted ) are located on the car.

    ( Correction…. the drawing for the deck lid, the hydraulic cylinder #11 should not read Gaz, instead it should read hydraulic)
    -a8-0911246y12-003-1-copie-jpg


    Regards.

    IAN.
    Last edited by IAN; 03-21-2020 at 04:39 PM. Reason: Correction

  8. #7
    Pit Crew XLRATING's Avatar
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    Jul 2011
    Location
    Virginia
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    Cadillac XLR

    2006 Infrared XLR (Beauty); 2008 GT500 (Beast); 2007 Black XLR-V (Victor)

    Default

    These babies don’t like sitting and a fair number of people have a new electronic problem when they take them out of storage. It might just need a “reboot” by disconnecting the battery. Go to google advanced search Google Advanced Search, put in *disconnect battery*, then go down and enter this site URL under “narrow results” and “site or domain.” That will help you find info on it; may be in the owners manual too but I haven’t checked.

    Good luck!

    yep, I drive a hybrid - a V8 bred for high speed!

    2006 Infrared XLR
    Corsa exhaust
    XLR-V sway bar
    Powder coated calipers
    Drilled & slotted rotors
    Custom engine cover
    Custom hood & trunk liner
    Zaino polish

  9. #8
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    Cadillac XLR

    2004 silver XLR

    Default

    Hi XLRATING.

    Why not trying it, its an economical way in rebooting a battery, however a weak battery remains a battery at the end of its life.

    The XLR is known for having a battery that would not stand its charge, as the multi modules needs the energy for operating, when sitting with no charge for weeks it do not pull very much, but after many weeks it will drained it and would not give the proper power for starting the car.

    At springtime when getting it on the road it is wise to make first, a full battery charge and also making a test for its holding charge, if it fail then the replacement could be a solution.

    Next fall, it would be wise to get a Battery TENDER, when time will come to put in storage your XLR, this way you will put all the chances on your side that your car, will start as expected in springtime.

    Regards.

    IAN
    Last edited by IAN; 03-21-2020 at 04:14 PM.

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