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Key switch power in headliner?

Discussion in 'Prius v Accessories and Modifications' started by MattFL, Oct 15, 2024 at 10:46 AM.

  1. MattFL

    MattFL Member

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    For a 2012 Prius, is there any power in the headliner/map-light area that switches on/off when the car is switched on/off? I'm installing a dash cam and it would be super convenient if I could get power from up there.
     
    #1 MattFL, Oct 15, 2024 at 10:46 AM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    No. Unless you have a factory homelink mirror.
     
    #2 rjparker, Oct 15, 2024 at 10:58 AM
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  3. Air_Boss

    Air_Boss Senior Member

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    I used the switched, proximate Homelink circuit to power the radar detector.
     
    #3 Air_Boss, Oct 15, 2024 at 1:28 PM
  4. MattFL

    MattFL Member

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    Thanks for the info. I'm not sure which mirror is in there (my wife's car), what identifying marks should I look for to identify it as homelink or not? Also would the car not be wired for a homelink mirror even if it didn't have one? My thought is it's a snap-in option, but maybe I'm wrong?
     
    #4 MattFL, Oct 15, 2024 at 2:17 PM
  5. Air_Boss

    Air_Boss Senior Member

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    The harness isn't present on a v without a factory Homelink mirror, but can be added.
     

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    #5 Air_Boss, Oct 15, 2024 at 2:48 PM
  6. rjparker

    rjparker Tu Humilde Sirviente

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    Dealers have a battery powered homelink mirror they can add which requires no wires.

    The easiest thing to do for a dashcam is to run a power wire down to the fuses and install a fuse tap. You can get unswitched 12v and ground at the map lights or pickup everything at the interior fuse box.

    Some dashcams can be wired to unswitched 12v and use logic to go into a sleep mode based on a loss of the higher charge voltage when running. Others will wake up if their impact or motion sensor detects something.
    IMG_6434.jpeg

    This is what your map light will have:

    20 pin schematic.jpeg
    As a side note, if you manually turn on a map light it will not turn itself off when you leave the car. A guaranteed dead battery in the morning.
     
    #6 rjparker, Oct 15, 2024 at 6:07 PM
    Last edited: Oct 15, 2024 at 6:15 PM
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