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Thread: Moisture in Headlight Lense

  1. #1
    arthall is offline Cadillac Owners Member
    Automobile(s): 2008 CTS
    Join Date
    Jun 2010

    Moisture in Headlight Lense

    I have moisture in my 1993 Allante drivers side headlight lens. How do I get in there to
    clean it? Is this a well known problem? How can I reseal the assembly? Thanks.

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  3. #2
    carnut is offline Cadillac Owners Master
    Automobile(s): 1999 BMW 740 Il. 2005 Jag XK8, 1988 Mercedes Benz 300 SE
    Join Date
    Feb 2003

    Re: Moisture in Headlight Lense

    All composite headlight housings have a drain hose. Condensation is rather common if the rubber O ring on the bulb itself is mispositioned or the drain hose is kinked or plugged up with debris. Assuming the bulb O ring is OK and the drain hose is as well, clear silicone can be applied around the lens where it joins the back. Use the cap with the second sized opening cut off its tip.


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