Air Horn 2009 International Prostar

Discussion in 'Trucks [ Eighteen Wheelers ]' started by trucker_maxwell, May 31, 2013.

  1. trucker_maxwell

    trucker_maxwell Bobtail Member

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    Jul 4, 2012
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    I have a 2009 prostar international. The air horn on it has seem to stop working. When I press the button all you hear is the compressor. I was windering if anyone has any ideas on what is wrong with it and where the horn is located.
     
  2. Heavyd

    Heavyd Road Train Member

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    So when you push the button, you hear the air compressor? That makes no sense to me. Are you saying all you hear is air leaking? The air horn is mounted under the front cross member. They are in a bad spot for getting damaged from road debris. They are only plastic and easy to break off.
     
  3. trucker_maxwell

    trucker_maxwell Bobtail Member

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    Jul 4, 2012
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    When you press the air horn button on the steering wheel it sounds like this! You hit it and it goes psht. Like when the button is pressed you can hear air escaping but no horn noise.
     
  4. Heavyd

    Heavyd Road Train Member

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    Either the horn itself is broken, or the air line going to it is popped off or leaking. Have someone push down the button while you track down the location of the air leak.
     
  5. trucker_maxwell

    trucker_maxwell Bobtail Member

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    Jul 4, 2012
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    So I messed with it today and you can feel air blowong through the horn bit it won't blow.
     
  6. Heavyd

    Heavyd Road Train Member

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    I have never opened one up, but there must be a reed valve or some thing inside a horn to make it sound. Simply must be broken or something stuck up inside. Rare failure. Should be easy to replace, only a couple of bolts and the one air line which should be a quick-connect type fitting.
     
  7. slavcha

    slavcha Light Load Member

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    Just replaced mine 2 days ago. Got one of eBay for $110 after OEM got damaged. I placed new one on the inner plastic fender close to fuel filter. Sound is 300% better.:biggrin_25525:
     
  8. slavcha

    slavcha Light Load Member

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    Oct 17, 2011
    Utica NY
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    After i lost my original i got one from harbor freight for $15 that had small air-compressor, i hooked this POS to 120 PSI and it sounded good, well for 10 seconds LOL. Then i was looking for it all over parking lot. Save your time and money, buy quality.
     
  9. Smaggs

    Smaggs Pie Crust

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    Pittsburgh, PA
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    sounds like the diaphragm is broken in the horn or maybe a seal leak. There is a piece in every air horn that flaps rapidly and the trumpet amplifies the tone. You need this to be road legal, so if it's not your vehicle, I highly recommend you report it so your equipment all works.
     
  10. GLR-Transport

    GLR-Transport Bobtail Member

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    Dec 30, 2015
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    Hey just for kicks press the air bags deflate button/switch. I had an air bag go bad and replaced it , one air line going to it no problem right, so when you press the deflate switch the air horns goes off and when you press the air Horn button on the steering wheel you hear the psht.. After pressing the horn button I realized the the air bags where deflating but when you press the deflate switch the horn goes off .
     
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