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Thread: Third Gen Black Faced Meter (BFM) Information - 2015-01-09

  1. #301
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    Quote Originally Posted by hupshall View Post
    I took apart my D type BFM to see about getting the security light to work. Although the circuit actually exists on the circuit board, none of the components are present.



    I populated these components and tested the board:



    The other problem is that the gauge silkscreen doesn't expose the security LED, so I carefully cut out the underlying shape (which was a key)



    I put in translucent red acrylic behind that hole and once installed behind the smoked plastic lens of the BFM, it disappears.

    Here it is all complete



    Seems to work just fine.
    When you populated the board, what resistors, diodes, caps, etc did you use? Soldering in some LEDs is pretty straightforward but I'm not sure what to use to populate the other components which are in the circuit. For example, the Security circuit connects to what's labelled as:

    R409
    D401 (which goes to pin 7 on the 30 pin connector)
    C415 & R410 (which I'd assume sets the time constant for the flashing?)
    the sport shift light bulb socket (easy to source)
    D171
    TR172 (perhaps a A1674?)
    CR512
    R174 (SMD?)
    R175 (SMD?)

    Any idea on these? Can you share where you found a diagram or what you did? It would be very much appreciated. I tried taking apart the USDM cluster I took out of my car and it's a different circuit... I have an Impreza cluster I can rob parts off of but this JDM board is a lot more complex than the USDM boards I've messed with before.

  2. #302
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    I do have a European market cluster which has the security LED preinstalled, so I will take at look at the components there when I get a chance.

    That said, I know that R174, R175, C512, D171, and TR172 are for the sportshift backlight, not the security light.

  3. #303
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    Thanks rkrenicki, much appreciated!

    I was just tracing the lines when I came up with those...I definitely could have traced wrong but I believe that one side of the sport shift light is in line with one of the security light diodes. Please do let me know when you have a chance.

    -Romy

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