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Keyed on fuse block

Discussion in 'Boxers/TR/M' started by Threeofnine, Aug 3, 2025 at 8:38 PM.

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  1. Threeofnine

    Threeofnine Formula Junior

    Dec 11, 2020
    414
    Birmingham, AL USA
    Full Name:
    Jarrod Heath
    #1 Threeofnine, Aug 3, 2025 at 8:38 PM
    I hardwired a radar detector, laser (LiDAR) jammer system and a police scanner in my US spec Testarossa. I’m trying to work out how to power everything. Ideally these components should only receive power when the ignition is in the on position. An external fuse block would probably be my best bet. How hard would it be to set one up where it only has power when keyed on?

    Temporarily, I have everything, except the radar detector, directly connected to the battery.
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,846
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Aug 3, 2025 at 9:25 PM
    You should not add so many things directly to the ignition switch (if they don't have an always +12V wire to supply their main power, and an ignition wire that only turns them "on" and does not supply the power to run them). If they only have a single wire to get their power, you need to add another ...113 relay that is energized by the ignition key, and then that relay supplies +12V power from the battery to those things. JMO.
     
    Threeofnine likes this.

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