"Door" function of dome lights don't work... On switch functions normally?

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  • jprastrullo
    Advanced Member
    • Jul 2012
    • 169

    #1

    "Door" function of dome lights don't work... On switch functions normally?

    What is the issue here... switching the position to "on" allows the light to turn on, but the "door" function doesn't work.

    What is the usual culprit here?

    My '87 Alpinweiß 325is Build Thread | Parts FS | Parts Wanted | Feedback
  • Red88
    E30 Enthusiast
    • Nov 2008
    • 1159

    #2
    Curious as well. I always figured there was no door function it then I saw the buttons in the front of the door jam. Can't figure it out.

    Have you made a purchase from www.blunttech.com recently?
    sigpic<< wrecked

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    • ELVA164
      R3V Elite
      • Dec 2011
      • 4861

      #3
      Remove the light and inspect it. The switch functions by moving a metal plate from one side to the other, and if the contact on one side has corroded or broken off that side of the switch won't function. Also, the wiring and/or plug on one side may be messed up somehow.
      Interested in vintage cars? Ever thought about racing one? Info, photos, videos, and more can be found at www.michaelsvintageracing.com!

      Elva Courier build thread here!

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      • jprastrullo
        Advanced Member
        • Jul 2012
        • 169

        #4
        Originally posted by ELVA164
        Remove the light and inspect it. The switch functions by moving a metal plate from one side to the other, and if the contact on one side has corroded or broken off that side of the switch won't function. Also, the wiring and/or plug on one side may be messed up somehow.
        I've inspected the 2 metal plates... obviously one is functioning fine.

        The one that isn't functioning doesn't have any noticeable defects... What do you recommend cleaning this with?

        Lastly, if the wiring/plug is messed up on the other side -- then am I screwed? haha.

        My '87 Alpinweiß 325is Build Thread | Parts FS | Parts Wanted | Feedback

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        • ELVA164
          R3V Elite
          • Dec 2011
          • 4861

          #5
          Originally posted by jprastrullo
          I've inspected the 2 metal plates... obviously one is functioning fine.

          The one that isn't functioning doesn't have any noticeable defects... What do you recommend cleaning this with?

          Lastly, if the wiring/plug is messed up on the other side -- then am I screwed? haha.
          Mine was completely broken so it was easy to see it was messed up :p If you flip the switch, the plate definitely makes positive contact?

          You can clean the plate with something like scotchbrite and brake parts cleaner, but if it's excessively burned there may be something else going on. Most likely, the wiring would be burned/melted near the bulb itself. Obviously it could be messed up further down the line, but I honestly don't know exactly where the wires pop out for you to inspect.
          Interested in vintage cars? Ever thought about racing one? Info, photos, videos, and more can be found at www.michaelsvintageracing.com!

          Elva Courier build thread here!

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          • vpilarrt
            R3VLimited
            • Jun 2006
            • 2096

            #6
            Could be the door switch itself. The contacts can get corroded. Remove the switch by removing the Philips head screw and inspect.

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            • E30335i
              E30 Enthusiast
              • Feb 2014
              • 1035

              #7
              Revived. When my door is closed its dim but when open its off. Pretty stumped on it as I checked the connections on door and on some light itself


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