Guide: Replacing Stock Horn with Hella Supertone for Prime

Discussion in 'Prime Accessories and Modifications' started by Mavi, Dec 13, 2019.

  1. Mavi

    Mavi Active Member

    Joined:
    Oct 12, 2015
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    Location:
    San Diego,ca
    Vehicle:
    2007 Prius
    Model:
    Five
    So I replaced the stock horns on the Prius prime with Hella supertones. I've also done dualtones before and they're close enough to me sound wise. Both are an improvement I just went with the supertones since I got a new set for $13.

    Step 1: Pop hood, remove the 6 clips with a flat head screwdriver or plastic trim remove. Then pull off the plastic engine cover.

    Step 2: disconnect the connectors from both left and right horns.

    Step 3: use 12mm socket to remove the lower bolt from the horn harness. Do on both, stock horns will now come out.

    Step 4. Make a ground strap. I used a spare copper electrical wire, but any copper wire include speaker wire will work . I crimped it using home depot electrical connectors for the rest.

    Step 5: Use a screw driver or sand paper to sand under the intake box screw. This is where ground wire will bolt to .

    Step 6 bolt in the two new horns using existing screws.

    Step 7: Either of the two spade connection can be a ground of positive doesn't matter which. Plug the ground strap to one. And to the other horn as well.

    Step 8: now plug in the original positive spade you pulled from the stock horns earlier to the other.

    Step 9: test the horns. If all is well put the engine cover and clips back and close up.
     

    Attached Files:

  2. Salamander_King

    Salamander_King Senior Member

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    Prime Premium
  3. Mavi

    Mavi Active Member

    Joined:
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    Location:
    San Diego,ca
    Vehicle:
    2007 Prius
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    Five
    Salamander_King likes this.
  4. Goat herder

    Goat herder Junior Member

    Joined:
    Nov 21, 2013
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    Vehicle:
    2012 Prius c
    Model:
    Two
    GREAT set of photos, and a clean upgrade of the
    Meep sounding horn.

    A month ago It was early morning I was waiting for a railway train to cross a state Hwy. Several semi trucks were heading back to the rock quarry they were using their train horns to honk at the train. Taking advantage of the " It was not me defense of violation of city posted ordinance "
     
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