2014 Volvo 780 Air Horn not working

Discussion in 'Volvo Forum' started by Gentlemanfarmer, Mar 29, 2020.

  1. Gentlemanfarmer

    Gentlemanfarmer Medium Load Member

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    Feb 26, 2010
    Greenville, FL
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    My air horn on my VNL 780 is not working. The city horn works, but no response from the air horn when I push the center steering wheel. I would appreciate if someone would post a video of where the air horn is located under the truck and where the solenoid is located. I have been under the truck and have not located the horn. Either I am blind or the horn is missing.

    Has any one replaced the OEM horn with a Grand General train horn? If so, where did you mount the train horn?
     
  2. Snailexpress

    Snailexpress Road Train Member

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    Apr 28, 2014
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    Air horn is under driver seat area. Air horn solenoid is on the cross member under cab. There is solenoids pack for air horn, suspension lower, fifth wheel slide, differential lock.
    Most likely you have problem on steering wheel slide contact or fuse but first have to check solenoid.
     
    Last edited: Mar 29, 2020
    Gentlemanfarmer and QUALITYTRUCK Thank this.
  3. Gentlemanfarmer

    Gentlemanfarmer Medium Load Member

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    Feb 26, 2010
    Greenville, FL
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    Found the air horn and exploring the solenoids. Thanks for your help.
     
  4. nasriza

    nasriza Road Train Member

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    Feb 1, 2013
    Chicago, IL
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    chase red 1/4 air line from the horn to the solenoid mounted on chassis crossmember right behind trans.
     
  5. Gentlemanfarmer

    Gentlemanfarmer Medium Load Member

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    Feb 26, 2010
    Greenville, FL
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    Thanks for the help. Turns out the air horn needs replacing,
     
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