Rear fog light to US Prius

Discussion in 'Gen 5 Prius Accessories and Modifications' started by Egidijus Zideckas, Nov 27, 2024.

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  1. Egidijus Zideckas

    Egidijus Zideckas New Member

    Joined:
    Oct 9, 2024
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    Location:
    Lithuania
    Vehicle:
    2023 Prius
    Model:
    XLE
    I'm in a progress to convert US Prius 2023 to comply EU requirements.
    I need to add turn light signal to mirrors, this is discussed in separate thread.

    Now I need to add rear Fog light. I have:
    1. switched to EU version rear bumper (part no: 5215947950)
    2. rear fog light (8148047030)
    3. Switch, turn signal handle (8432912170) - this I'm not sure if it will work. So

    I don't have wiring diagram to verify if US car will work with EU turn switch (with fog switch), maybe @Hammersmith could help with this?

    Only one diagram which I found is mentioning FOG RR Relay:
    upload_2024-11-27_22-7-45.png

    upload_2024-11-27_22-12-2.png

    Turn signal handle connects to Spiral Cable sub assembly - have no idea what these pin names mean.
    upload_2024-11-27_22-16-49.png
    Spiral cable then has CAN bus to whatever ECU.
    So, if I'm lucky, I'll switch turn signal handle and relay FOG relay starts clicking, right?
    Guess I'll have to find out :)
     
    #1 Egidijus Zideckas, Nov 27, 2024
    Last edited: Nov 27, 2024
  2. Junting

    Junting New Member

    Joined:
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    Location:
    Portugal
    Vehicle:
    2024 Prius
    Model:
    Limited AWD-e
    I am about to attempt this too as my car just arrived in Portugal, would love to hear whether you were able to get all the modifications done!
     
    #2 Junting, Feb 27, 2025 at 4:30 PM
  3. Hammersmith

    Hammersmith Senior Member

    Joined:
    Jul 26, 2021
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    Location:
    North Dakota - USA
    Vehicle:
    2023 Prius
    Model:
    Limited AWD-e
    I must have missed this before. I can't speak for the spiral cable or the turn signal switch, but just about all* Priuses come with the same Power Distribution Box Assembly. That means all the US models have the rear fog light relay.

    I discovered this when doing my power folding mirror conversion. I thought my project was dead for a while because of the relays built into the PDBA until I found out almost all Priuses use the same one. That meant the relays were already there. I had to add wiring from the PDBA to the mirrors and mirror switch, but everything worked once that was done.

    I don't have easy access to the European wiring diagrams, so I don't know what differences there are between the rest of the rear fog light system. It might be minor or it could be major.



    *I found a second PDBA for the Prius, but I think that one is exclusive to the Japanese market and is for the very bottom trim sold there.
     
    #3 Hammersmith, Feb 28, 2025 at 3:18 PM
    Last edited: Feb 28, 2025 at 3:30 PM
    soft_r likes this.
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