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  1. #1
    Active Member kdp1308's Avatar
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    Default Replacing horn with air horn, relay or no relay?

    Like the title says, I am replacing my stock horn (13 RTS) with a Wolo bad boy air horn. Do I need to use the supplied relay or not?
    Thanks,
    Keith

  2. #2
    Very Active Member Grandpot's Avatar
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    Use the relay. The current draw of the air horn is much higher than the OEM horn.
    2011 RTS (Sold to a very nice lady)
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  3. #3
    Very Active Member oldguyinTX's Avatar
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    Absolutely yes, and put an in-line 20 amp fuse on the positive lead.
    "A Wise Man Once Said, I Should Ask My Wife."
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  4. #4
    Member Rangerjames9's Avatar
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    I have Wolo bad boy horn on my 15 rtl ..... very happy with it
    2016 RTL , White

  5. #5
    Very Active Member Lew L's Avatar
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    Use the relay to get full amperage at the horn. Otherwise all the electrons are going through the little contact on in the horn button.

    Lew L
    Kaos----- Gone but not forgotten.

    2014 RTS in Circuit Yellow, farkle-ing addiction down to once every few months. ECU FLASH IS GREAT.
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  6. #6
    Very Active Member Lew L's Avatar
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    Just an up date here:

    The Wolo horn draws 16 amps. Use the relay.

    The Strieble draws 18 amps ( at 12 volts )

    I wonder which one is louder??
    Kaos----- Gone but not forgotten.

    2014 RTS in Circuit Yellow, farkle-ing addiction down to once every few months. ECU FLASH IS GREAT.
    2014 RTS , Circuit Yellow

  7. #7
    Very Active Member Grandpot's Avatar
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    Quote Originally Posted by Lew L View Post
    Just an up date here:

    The Wolo horn draws 16 amps. Use the relay.

    The Strieble draws 18 amps ( at 12 volts )

    I wonder which one is louder??
    I thought those horns were the same, just branded differently. Am I incorrect?
    2011 RTS (Sold to a very nice lady)
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  8. #8
    Active Member kdp1308's Avatar
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    I couldn't find anywhere how many amps the horn draws. Thanks, Lew. The kit that spyderpops sells doesn't show a relay. Somewhere I saw that the spyder had a relay for the horn but looking at the wiring diagram didn't show any. My horn is mounted inside the frunk so I will have to use some kind of connector. Maybe I will try to find a 4 pin plug to replace the 2 pin plug that is a pain to undo. I will wire in the relay just to be safe. That way I can use it a lot!

  9. #9
    Member Rickster48's Avatar
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    I have Fiamm Freeway Blaster horns to install on my RT. Had them on my Yamaha FJR and they're great. My question is, does anyone know if the horn button on a RT is on the positive or negative (ground) side? The instructions have a diagram for wiring the included relay for both situations. Also, I assume from Lew L's comment #5 that there is no relay on the factory horn. Anyone know if that is the case?

  10. #10
    SpyderLovers Sponsor cptjam's Avatar
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    Correct; no relay on the factory horn. We have done them both ways; with relay, and without. Never an issue either way.
    Joe Meyer



    Dealer for the Outlaw/ROLO laser Alignment system

  11. #11
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    If I'm not mistaken, and I frequently am, if the power to the horn goes through the horn switch then you will most definitely want to use the relay. The reason is, that an aftermarket horn can draw enough power to eventually destroy the horn switch. The switch is usually not designed for high current draw.

  12. #12
    Very Active Member billybovine's Avatar
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    Here are my thoughts. BRP does not use a relay for their horn. The horn switch in the left handlebar controls makes the connection to ground completing the circuit. I have not seen anywhere how much current that switch can safely carry. It may be able to carry much more current safely. Just don't know. So considering that to fix that switch, if you burn it out, would mean replacing the whole control assembly and cost $400 plus. A relay is just cheap insurance.

    2018 F3 LIMITED

  13. #13
    Very Active Member Lew L's Avatar
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    Quote Originally Posted by Grandpot View Post
    I thought those horns were the same, just branded differently. Am I incorrect?
    Concerning the Wolo "bad boy horn " and the Striebel " Nautilus horn:

    I've been able to compare the two side by side. One on my V-Max( with a relay, of course) AND on on my 1998 Honda Valkyrie ( with the relay). Good batteries, bikes literally side by side. The Striebel was noticeable louder. I was about 25 feet in front as my wife did the horns. She didn't like either one as both were loud.
    So are the horns the same?????? I don't know as I didn't take them apart. The Valkyrie had the safety chrome model. As hidden as the horn is on the ------ It is painfully loud, even to my old, well abused ears----- WHAT?

    Lew L
    Last edited by Lew L; 02-06-2019 at 10:47 PM. Reason: speeling
    Kaos----- Gone but not forgotten.

    2014 RTS in Circuit Yellow, farkle-ing addiction down to once every few months. ECU FLASH IS GREAT.
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  14. #14
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    I have been replacing the awful horns provided on motorcycles for 50+ years.( I have had 25 motorcycles)
    Take the old horn off and toss it. Wire in two 2 tone horns in series and connect to the horn power output.
    Done. Never had a problem.

  15. #15
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    Quote Originally Posted by azprince View Post
    Wire in two 2 tone horns in series and connect to the horn power output.
    Done. Never had a problem.
    Why in series ?
    While that would certainly cut down the total power draw, I would think it would cut the total volume to about half too.

  16. #16
    Very Active Member oldguyinTX's Avatar
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    Amazon sells the Wolo horn with the relay. That's where I got mine. Hardest part was getting wires down to the battery, but all in all, not too bad.
    "A Wise Man Once Said, I Should Ask My Wife."
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  17. #17
    Very Active Member Grandpot's Avatar
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    Quote Originally Posted by Lew L View Post
    Concerning the Wolo "bad boy horn " and the Striebel " Nautilus horn:

    I've been able to compare the two side by side. One on my V-Max( with a relay, of course) AND on on my 1998 Honda Valkyrie ( with the relay). Good batteries, bikes literally side by side. The Striebel was noticeable louder. I was about 25 feet in front as my wife did the horns. She didn't either one as both were loud.
    So are the horns the same?????? I don't know as I didn't take them apart. The Valkyrie had the safety chrome model. As hidden as the horn is on the ------ It is painfully loud, even to my old, well abused ears----- WHAT?



    Lew L
    Thanks for the reply. I have a Striebel on both my Valkyrie and 2011 RTS. Mounted them facing forward in the OEM positions.
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  18. #18
    Active Member Dmetcalf's Avatar
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    +1 for the 20 amp. Fuse and relay
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  19. #19
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    The Stebel is rated at 123 dB. I do not know what the Wolo is rated at. I have mounted Stebels on all my M/C's. The I will be mounting a Stebel this spring, OBTW, use the relay. I always do. Never had an issue.
    2018 Limited , Grey (Looks green to me but title says grey)

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