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Thread: New to Allante - Allante Headlight Problem

  1. #1
    Carzguy is offline Cadillac Owners Member
    Automobile(s): 1987 Allante, 1969 DeVille Convertable, 1970 Deville Conv,
    Join Date
    Jan 2010
    Posts
    2

    New to Allante - Allante Headlight Problem

    Hello,
    I just purchased a 1990 Allante and it has numerous problems that I am trying to figure out and fix. The headlights do not work. I have pulled the bulbs out and tried them in another non Cadillac car and they work fine. I metered the wire connections on the Allante and I have voltage at the wires (11.7 volts), yet the lights don't work.

    What am I missing?

    Thanks
    Guy
    1990 Allante


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  3. #2
    OffThaHorseCEO is offline Cadillac Owners Connoisseur
    Automobile(s): 2013 ATS Premium 3.6, 1989 AllantÚ
    Join Date
    Jul 2005
    Location
    Fayetteville NC
    Age
    33
    Posts
    4,513

    Re: New to Allante - Allante Headlight Problem

    are you getting any lighting codes or does the dic indicate that any of the bulbs are out?

    does the headlight switch for for other functions such as the fog lights?

  4. #3
    Join Date
    Jun 2004
    Location
    West Palm Beach, FL.
    Posts
    188

    Re: New to Allante - Allante Headlight Problem

    The lighting system on 1987 through 1992 AllantÚs is very sophisticated. The bulb filaments are turned on by solid state switches called OSM's which are operated by the body computer module. You need to get a factory service manual to troubleshoot this system.

  5. #4
    Carzguy is offline Cadillac Owners Member
    Automobile(s): 1987 Allante, 1969 DeVille Convertable, 1970 Deville Conv,
    Join Date
    Jan 2010
    Posts
    2

    Re: New to Allante - Allante Headlight Problem

    Yes I am getting the lighting codes and the dic indicates that the bulbs are out. The headlight switch lights the other lights including fog lights.


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