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Fuse tap to use for radar

Discussion in '458 Italia/488/F8' started by Rev488, Jul 13, 2025.

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  1. Rev488

    Rev488 Rookie

    Jun 23, 2025
    22
    Dallas, TX
    Full Name:
    NM
    #1 Rev488, Jul 13, 2025
    Tried 4 different fuses in the fuse box located under the steering wheel in my 488 but none of them are powering my Uniden R8 utilizing a fuse tap. Powers fine when hooked directly to the battery but I don't trust the battery saver setting in the R8. Anyone successfully used a fuse tap? If yes, which exact fuse position worked for you? Tried searching and all the ones people used do not work for me. Thank you.
     
  2. luvair

    luvair Formula 3
    Owner Rossa Subscribed

    Jun 4, 2005
    1,601
    #2 luvair, Jul 13, 2025
    This works for a 458. Hopefully helpful for your 488.


     
    Rev488 likes this.
  3. Rev488

    Rev488 Rookie

    Jun 23, 2025
    22
    Dallas, TX
    Full Name:
    NM
    #3 Rev488, Jul 13, 2025
    Thanks for the link. Gonna try it tomorrow and will report back.
     
    luvair likes this.
  4. Rev488

    Rev488 Rookie

    Jun 23, 2025
    22
    Dallas, TX
    Full Name:
    NM
    #4 Rev488, Jul 14, 2025
    The fuse location used in this video worked great for me. It's actually one I tried before, but my problem was that I was using a 15A fuse for my radar and it needed at least 20A. As soon as I got this swapped out, powered up perfectly fine. Appreciate the help!
     
    luvair likes this.
  5. Phelips

    Phelips Karting
    BANNED

    May 30, 2025
    66
    Full Name:
    Russel Phelips Brown
    #5 Phelips, Jul 14, 2025
    Try fuse F47 (20A, passenger compartment fuse box) it’s ignition-switched and works for many radar detectors in the 488. If that fails, check F3 (10A) or F54 (15A). Use a multimeter to confirm 12V with ignition on. Some Ferrari fuse boxes are finicky ensure the tap is fully seated and making contact. If still no luck, hardwiring to the mirror (if equipped) is another clean option.
     
    tfos750 likes this.

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