Where to get power for accessories?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by IwasBirchyFirst, Sep 17, 2025 at 12:35 AM.

  1. IwasBirchyFirst

    IwasBirchyFirst Junior Member

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    I need to add some extra lighting and wonder what the options are for getting a fused source of 12v DC.
    I don't want to use the lighter ports, they are in use for other things. I presume that leaves under the dash, as I don't see anything under the hood.
     
    #1 IwasBirchyFirst, Sep 17, 2025 at 12:35 AM
  2. ChapmanF

    ChapmanF Senior Member

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    I'd usually start by deciding when I want it to have 12 volts (all the time? When the car is in ACC? IG ON?), and where I want it (in the cabin? out under the hood?) and then start looking in the wiring diagram:

    Toyota Service Information and Where To Find It | PriusChat

    Sometimes you even find your trim has a fuse slot already present that isn't used, and the inner-circuit diagram shows you which connector terminal it comes out on.

    Of course, how much current you want also matters. It wouldn't be a good idea to use a larger ampacity fuse in a slot that was intended for a smaller.
     
    #2 ChapmanF, Sep 17, 2025 at 10:51 AM
  3. ASRDogman

    ASRDogman Senior Member

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    What type of lighting? Depending on how much amperage you're going to need, there are likely
    fuses that aren't being used you can tap into. Like the heated seats? If you don't have heated
    seats, you can use that spot.

     
    #3 ASRDogman, Sep 17, 2025 at 11:07 AM
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  4. PriusCamper

    PriusCamper Senior Member

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    More lighting for what? How many watts are the lights? The wiring you would do for exterior lighting is way different than what you'd do for interior lighting
     
    #4 PriusCamper, Sep 17, 2025 at 2:35 PM
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