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Thread: Anyone know what this connected to?

  1. 07-03-2015, 05:24 PM #1
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    Anyone know what this connected to?

    Hi,
    While replacing my headlights in the '03 540it, I noticed this on the passenger side near the air box. I don't recall pulling it off anything but there it is, staring at me.
    I have some other stuff I wanted to do under the hood today so if anyone knows what it is supposed to connect to or if it's a diagnostic terminal, please let me know.




    Or help point me in the right direction to figure this out. Thanks!
    Last edited by Plattus1000; 07-10-2017 at 10:47 PM.
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  2. 07-04-2015, 08:05 AM #2
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  3. 07-04-2015, 10:20 AM #3
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    that must be an Individual option...
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  4. 07-04-2015, 10:31 AM #4
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    Quote Originally Posted by geargrinder View Post
    Pre-wiring for forward-facing destructor beam option. You need the dilithium crystal power pack option as well for it to be functional.
    removed mine, really clears a path but makes the car a bit nose heavy....

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  5. 07-04-2015, 04:05 PM #5
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    There are times when I forget that you gurus have a sense of humor. This was hilarious and I love the replies.
    Clearly none of you noticed the perfect trilateral symmetry for accepting the triple helix matrix for the flux capacitor.

    Honestly, I'm going to have to pull the passenger headlight out and try and figure it out. It's killing me.
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  6. 08-03-2015, 06:04 PM #6
    Richard Stutsma
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    Check out the wire colors and look them up in the Bentley manual.
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  7. 07-10-2017, 10:48 PM #7
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    I gave that half of the Bentley manual set away to an engineer who bought my previous 540i.
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  8. 07-12-2017, 08:21 AM #8
    itsbrokeagain
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    Hrm...I almost want to say AC pressure sensor connector? Or secondary air? Thems some thick wires
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  9. 07-12-2017, 08:43 AM #9
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  10. 07-12-2017, 10:25 AM #10
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  11. 07-12-2017, 11:52 AM #11
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    Quote Originally Posted by BimmrMeUpSnotty View Post
    That'z no BMW plug.
    But here it is.

    - - - Updated - - -

    Quote Originally Posted by geargrinder View Post
    2yr zombie revival.
    2 yr old mystery still.
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  12. 07-13-2017, 03:02 AM #12
    HartgeM5
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    It looks like the plug for the AC condenser fan (auxillary fan). Turn the AC on and see if the fan behind the front grill spins.
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  13. 07-13-2017, 05:25 PM #13
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    Quote Originally Posted by HartgeM5 View Post
    It looks like the plug for the AC condenser fan (auxillary fan). Turn the AC on and see if the fan behind the front grill spins.
    I'll give that a shot as soon as I get home. Thanks.
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