Denali Split Soundbomb Horn

Discussion in 'Technical Help' started by Sprinter1050uk, Jul 19, 2021.

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  1. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
    Recently fitted one of these to my ST1050 with the relay etc taking a feed from the positive side of the battery with an inline fuse. When I used it in anger due to an e scooter deciding that he could pull out into flowing traffic and stop in the junction I was turning into, the bike’s horn / indicator fuse blew. The horn was only sounded for about two seconds.Fuse replaced and all good as new until I went out into the country to test it, the fuse blew again after just two seconds. I have used air horns for years with relays and never had an issue, any suggestions apart from not using it.
     
  2. Cyborgbot

    Cyborgbot Guest

    Are you using the Denali wiring loom or did you make your own?
    Did you supply the relay?
    Any chance the high (direct from battery) and low (from the horn button) were mixed up?
    Did you take the original horn out of the circuit or keep it in?
    Photos help - even if only with the subject being kittens.
     
    • Like Like x 1
  3. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
    I have used my own wire which I have used before.
    The relay came with the horn.
    99.9% sure it’s wired up the correct way but as it’s under the fairing can’t just access it to double check as it’s biggish job stripping it down to see hence no pics.
    Other horn is removed
    Forgot to say when you first press the button it seems a little wheezy like it’s having to fill the tube with air so when I first go out I always ‘prime’ it so it works first time.
     
  4. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
    Yes other horn removed, didn’t think it would work the wrong way round but I suppose it is still getting the original feed which can’t cope with the extra power needed. Will have to strip fairing off and have a look. I’ll have another relay ready in case. Thanks I’ll let you know when it’s sorted.
     
  5. Cyborgbot

    Cyborgbot Guest

    #5 Cyborgbot, Jul 20, 2021
    Last edited by a moderator: Jul 20, 2021
    I shortened my hose once fitted as I liked it. That meant less time to build up pressure to toot loudly.

    What was the fuse in the indicator/horn circuit?

    Might be worth checking that it is the right amperage for the new horn that will draw more current than the original.

    Looking at the Denali website they supply a 20A fuse - obviously for the high current side of the circuit.

    The current on the relay coil should be 100 to 200mA
     
  6. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
    The standard horn /indicator fuse is 15amp and the one inline is 20amp but if it wired back to front do to speak that is why there is the issue. I might just pop a 20 amp in the horn / light and see if that makes a difference then strip the fairing off and check the wiring. Do relays come in different amps?
     
  7. Cyborgbot

    Cyborgbot Guest

    #7 Cyborgbot, Jul 20, 2021
    Last edited by a moderator: Jul 20, 2021

    You can put a fuse the wrong way around?

    I’d have though the 15A would be ok for the relay switch as it draws so little current. The horn draws 20A which is right on the limit of the 20A fuse. Maybe try a 25 or 30A assuming the wiring you used can take it.
     
  8. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
    Hailstorm stopped play in the garden this afternoon so went into the garage, stripped the fairing off, checked all the connections and ye ( including me ) of little faith they were all correct. Checked the inline fuse which is a 30 amp so as everything ‘ in order’ decided to change the relay. Hopefully neighbours didn’t get too upset but seems to last more than a short burst. Sun out now so off into the countryside to give it a test. Also shortened the air pipe which may help as well. Fingers crossed
     
    • Like Like x 1
  9. Cyborgbot

    Cyborgbot Guest

    The neighbours.

    1C043377-4AD1-4E0F-BF19-B96163628FCF.gif
     
    • Funny Funny x 1
  10. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
    When did you meet my neighbours?

    Anyway success, no blown fuses lots of ‘ BARPS ‘, not many sleeping s , or s out there tonight. Need to try them in town tomorrow on the dozy ‍♀️s and
    Need to get some of those Tour de France horns fitted.
    Thanks for all the advice anyway
     
  11. Sprinter1050uk

    May 4, 2017
    55
    18
    Mansfield, Notts
     
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