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Easiest way to run a new wire through firewall?

Discussion in 'Gen 3 Prius Technical Discussion' started by Seymour1, Sep 26, 2024 at 5:17 PM.

  1. Seymour1

    Seymour1 Junior Member

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    I want to add a new horn but to use independately. I need a wire to go from a new horn button to the engine compartment. Any ideas?
    I once had a Camry that the weak horn operated normally unless I also had my foot on the brake petal. Then, the loud horn blew. I could select loud or soft.
     
    #1 Seymour1, Sep 26, 2024 at 5:17 PM
  2. ChapmanF

    ChapmanF Senior Member

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    #2 ChapmanF, Sep 26, 2024 at 6:04 PM
  3. Seymour1

    Seymour1 Junior Member

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    Thank you. This is exactly what I was looking for.
    At first, I was a little confused by ebay commercials in between posts. The commercials looked highly technical
    but did not make sense.
     
    #3 Seymour1, Sep 26, 2024 at 8:36 PM
  4. TNToy

    TNToy Member

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    This is easy to set up with a relay, for the record., using the factory horn button on the steering wheel. You’d only have to run a wire tied into the stop light switch (12v+ with brakes applied) into the engine bay.
     
    #4 TNToy, Sep 26, 2024 at 10:59 PM
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