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Horn Upgrade --- DIY

Discussion in 'Gen 3 Prius Accessories and Modifications' started by evpv, Jan 2, 2011.

  1. reidhester

    reidhester New Member

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    Thanks for the write up. So you didn't need to wire in a relay?

    I put a Stebel horn on my 2010 BMW R1200GS motorcycle last year. At 135db it gets your attention! So I've been considering doing this for the Prius also but would prefer the big Caddy sound to the Stebel's more euro sound.
     
  2. evpv

    evpv Active Member

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    No relay is needed for these horns, just a simple plug-in installation.
     
  3. Fla Fla Flo Fly

    Fla Fla Flo Fly Junior Member

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    I replaced mine last weekend after someone was changing into my line while I laid down on the horn. They didn't hear a thing, and neither did my wife who was in the passenger seat!

    So far, I'm happy with the cheap and easy upgrade! :rockon:
     
  4. SmellyTofu

    SmellyTofu Average punter

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    Interesting read. Just wondering if anyone that did this mod had the radar cruise/Pre-crash system module up front behind the badge?
     
  5. reidhester

    reidhester New Member

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    Thanks for the reply.
     
  6. johnmaci

    johnmaci Junior Member

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    What I did not see is where the grounding wires were attached?
     
  7. alanderego

    alanderego Member

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    Check out my install. You can see the sensor.
    No problems at all with the dynamic cruise control.
    Alan
     
  8. alanderego

    alanderego Member

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    Check out my install. I am sure I showed where I landed the ground wire.

    Alan
     
  9. evpv

    evpv Active Member

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    The FIAMM horns come with ground wires. One end plugs to either plug on the horn, the other has an eyelet. Just place the eyelet between the bracket and mounting nut, the metal mounting bracket will ground it to the chassis.

    [​IMG]
     
  10. chikai

    chikai Member

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    Awesome...thanks for the write up. Just ordered and installed this T-Day break. $18.88 via Amazon delivered for both.

    WOW I can't wait to use it the next time someone cuts me off. Wahhhh-wahhhhh!!!
     
  11. Alexma

    Alexma Member

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    Have you ever tried spraying some silicon on the male and female end before putting it together, this along with a good wrap of 3M electrical tape should keep it dry.

     
  12. reidhester

    reidhester New Member

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    Have you ever tried spraying some silicon on the male and female end before putting it together, this along with a good wrap of 3M electrical tape should keep it dry.

    Another alternative is to use shrink wrap tubing and a heat gun.
     
  13. Alexma

    Alexma Member

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    That works good too. The only problem I had with that is there is sometimes some exposed sections on the connections.

    I used to start at the relay and keep wrapping the tape until I got to the bundle of wires. about 2 inches below the bottom of the relay.

    It all depends on where the relay is mounted or placed.

    It seems like every time a relay and connectors needed to be replaced, the wires would end up being too short after cutting the bad stuff off.

    LOL..........never a problem if the relay is inside the car.
     
  14. torr310

    torr310 Junior Member

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    Great job! The small horns bother me when I switched from a medium sized sedan. It's hard to be heard by these big trucks.
     
    D_n_D likes this.
  15. Motorman

    Motorman Junior Member

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    Thanks EVPV, the instructions were great. After almost being backed into by a lady backing out in a parking lot as I was waiting for a pedestrian. I decided I needed a real horn. What a difference!
     
  16. Motorman

    Motorman Junior Member

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    Thanks evpv your instructions were very complete. The sound is so much better.
     
  17. Volstylexx

    Volstylexx New Member

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    So i just completed this DIY and i must say that I am a very avid DIYer and have worked on many many vehicles in the past. This is by far the MOST difficult project I have ever done. I just completed and i literally had to pull the upper part of the bumper back to get in to the existing horn bolts. Unless you have incredibly small hands, this will tear your arms up. Mine look like i just got into a fight with a thorn bush.
     
  18. SoCalBPrius

    SoCalBPrius Active Member

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    I also did this mod & thought the instructions were excellent & straight forward.
     
  19. Volstylexx

    Volstylexx New Member

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    yes ,couldn't have even attempted the project without this forum and post ,was just much more difficult than anticipated with my large hands lol
     
  20. SoCalBPrius

    SoCalBPrius Active Member

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    Haha, totally understand what your sayin as this is one of the few times I can say my smaller hands were an advantage over your bigger hands;).