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Has anyone tapped a BlackVue to the domelight to get constant 12V for always on power?

Discussion in 'Model 3' started by plasmo, Oct 24, 2018.

  1. plasmo

    plasmo Member

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    I saw this video, and was wondering if anyone has been able to successfully hook up a dashcam (i.e. BlackVue) to tap into the yellow domelight wire to get constant 12v power.... and confirm that this will not hurt the battery?

     
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  2. outie

    outie Active Member

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    Been doing this for a month plus without issue.
     
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  3. plasmo

    plasmo Member

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    Nice thanks. So did you connect directly into the yellow wire, like the video shows? I think other methods have caused Battery errors after a few months.
     
  4. outie

    outie Active Member

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    Yes the yellow and black wire in the dome light. Used t-tap to tap into the wires. The cable goes in the dome assembly and comes out of the other side of headliner very nicely. Used a zip tie to fish it.
     
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  5. iTech

    iTech Member

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  6. MP3Mike

    MP3Mike Well-Known Member

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    Just a note that it isn't a constant 12v power, it drops to 9v while the car sleeps. But it appears that the dashcams people use are OK with that.
     
  7. plasmo

    plasmo Member

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    @outie -
    Is this the only area you used (yellow and black wires under the dome light) to hook up your dashcam?
    Only reason why i'm asking is because I'm seeing all these other threads in different locations (under the footwell area, side of dash, etc) that people are tapping into...which seems much much more complicated. Just wanted to make sure...thx again
     
  8. outie

    outie Active Member

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    Yes. I cut the BlackVue cigarette adapter wire and tap into yellow and black in the dome light, no where else.
     
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  9. JPP

    JPP Active Member

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    I have had this setup (as in the video) for 3 weeks with a Blackvue dual front rear 900 model and no issues. Just cut the Blackvue power cable and removed the cigarette lighter plug, stripped the cable (note that the power cable has the woven metal sheath as ground, and the solitary center insulated wire as the positive), and used Positaps to connect to the yellow and black. It is kind of a tight fit to shove the Positaps and existing connector back into the small aperture provided, but it does work. All good.
     
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  10. plasmo

    plasmo Member

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    Thanks @outie and @JPP for your info.

    I am fairly confident on the hookup process, BUT does anyone know if there is a video (or photos) already out there showing the steps (i.e. has someone already made a tutorial on this?).... it would be very helpful for people to make sure they are doing the correct steps.
    I did some searches, but only able to find video tutorials of tapping into the other 12v areas in the car, and not the dome light.

    thanks
     
  11. outie

    outie Active Member

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    You linked to the video I used in the first post of this page. It’s really obvious what you need to do after opening it up. Just shoot over any question you have after you open it.
     
  12. kengchang

    kengchang Active Member

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    What awg size to get for posi-tap?
     
  13. BobAbooey

    BobAbooey Member

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    So the camera is always recording this way?
     
  14. outie

    outie Active Member

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    The red ones. 20awg or so?

    Yes.
     
  15. BobAbooey

    BobAbooey Member

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    Does that hook to the little 12v battery?
     
  16. kengchang

    kengchang Active Member

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  17. outie

    outie Active Member

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    Via the dome housing power yes.
     
  18. outie

    outie Active Member

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  19. kengchang

    kengchang Active Member

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    How do you wire the woven metal sheath as ground on the blackvue cable to the dome light black cable?
     
  20. plasmo

    plasmo Member

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    So does anyone have any video showing the actual hookup/connection using the domelight yellow and black wires with the dashcam? The video in the original post shows how to access the wires, but doesn't show the actual dashcam connection.
    Can someone who has done this take a video or post some pics on how they tapped their wires? thanks!
     

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