Dual horns - will the factory circuit support a 2nd horn?

[Tucker01]

Does anyone know if the factory horn circuit on a 2018 f3 limited can support a second horn ? TY

[redrazor]

Does anyone know if the factory horn circuit on a 2018 f3 limited can support a second horn ? TY

I added one more horn from Autozone right next to the stock horn on my 2014 RTL .... nice and loud now with good tone. NO Problems.

[al0vely]

Dual horn kits from Lamonster and Sling Mods work … so I guess the answer is yes.

[Tucker01]

Thank you

[pauly1]

I have dual Bad Boy air horns mounted on our F3 models. Wired in a 40 amp relay direct to battery, energized by OEM horn circuit, leaving the OEM horn is "play", too. Followed Kevin Story's lead with using different tones, creating a train horn dissonance. The less load difference one places on the CANBUS system, the better. Also, the switch in the handlebars is not rated for high amperage draw.

[UtahPete]

Does anyone know if the factory horn circuit on a 2018 f3 limited can support a second horn ? TY

Depends on total amperage. Keep it below 10 amps, it may be okay.

[GRHorst]

I used a relay kit from Amazon to connect dual horns. I'm not sure it was necessary. But it seemed to be in doubt. This kit switches full power from the battery to the horns via a relay switch activated by the factory horn button circuit.

[Peter Aawen]

I used a relay kit from Amazon to connect dual horns. I'm not sure it was necessary. But it seemed to be in doubt. This kit switches full power from the battery to the horns via a relay switch activated by the factory horn button circuit.

Probably a good idea to do it that way, cos if your dual horns happen to draw too much in the way of amperage & you operate them for too long, melting the switch that's an integral part of the Handgrip Control Module could be expensive!

Mind you, I haven't seen that happen to a Spyder horn button (not yet, anyway! ) probably cos they don't stay on for hours at a time... But I know for a fact that running too many extra lights without a relay that draw too much in the way of amperage thru the light switch can end up in a way that's not really pretty, and if you're lucky, it'll only be 'mildly expensive' to replace the entire handgrip when the switch itself &/or its wiring melts But it's not gonna be anywhere near so 'mild' in the expense department if the switch &/or wiring ignites the plastic &/or wiring insulation & the whole bike burns! You'll really wanta hope that your Insurance Co is sympathetic!

Just Sayin'

[Peteoz]

As others have said, if you are looking to add a full blown air horn like Lamont’s 18” long ones, no it won’t support it.
But…….you can certainly use the stock horn wiring and connectors if you replace your stock horn with something like the Wolo Bad Boy. It is designed to be plug and play. I believe Spyderpops description hasn’t been updated to include later model F3. I had one on my ‘16 F3 and now on my ‘21 RT.

https://spyderpops.com/the-bad-boy-h...odels-2015-16/

Pete