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Polarity

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by J Humes, Sep 2, 2017.

  1. J Humes

    J Humes Junior Member

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    On the 2012 Prius Hatchback -
    The backup light bulb has a white and red wire.
    Which one is positive +?
    My Toyota dealer won't tell me.
    JR
     
    #1 J Humes, Sep 2, 2017
  2. bisco

    bisco cookie crumbler

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    nice dealer.:confused: generally, red is positive and white is ground.
     
    #2 bisco, Sep 2, 2017
    J Humes likes this.
  3. tankyuong

    tankyuong Senior Member

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    or use volt meter
     
    #3 tankyuong, Sep 2, 2017
  4. J Humes

    J Humes Junior Member

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    Thanks all - :)
     
    #4 J Humes, Sep 2, 2017
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  5. ChapmanF

    ChapmanF Senior Member

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    Or wiring diagram.

    I've found white-with-a-black-stripe to be a widely-used ground color in Prii. (Still no substitute for checking the particular circuit you're looking at, with a voltmeter, or the diagram.)

    Uncover any of the ground points in the Prius, and you'll see scads of white-with-black-stripe wires attaching to it.

    -Chap
     
    #5 ChapmanF, Sep 2, 2017
    Elektroingenieur likes this.
  6. NutzAboutBolts

    NutzAboutBolts Senior Member

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    Red is usually +positive, white and black are ground.
     
    #6 NutzAboutBolts, Sep 2, 2017
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