Scrambler 1200: New Horn Fitted - But Won't Work Properly

@Mr Moofo only thing i can think of here is the horn button has got stuck in the on or pressed location. You may have to undo the switch and clean it all up or get some plus gas into it. Check one of the horn wires has not got damaged and the horn is fitted properly.

 

Is the horn powered direct from the switch or does your Triumph do this via canbus?
If it's the former then you may have damaged the switch (I suspect the current drain of the Denali will be higher than the OE horn because it's louder)

If it's the latter then perhaps disconnect the battery for 15 minutes to see if it resets the canbus system. If that doesn't work it might need plugging into a diagnostic reader to see it there's any fault codes showing and go from there. I have a soundboard mini on my ditchpump, but it's as an additional horn, powered through a Hexezecan not a replacement using the OE wiring

 

Agree it looks like it might have damaged the switch as it draws more current than the original horn. Are there any warnings in the installation instructions about relays for example?

 

I would probably start by looking at the horn relay (if it has one) first to check if it is still functioning properly. It is possible that the contacts have fused together due to the higher current draw but the handlebar switch should be ok?

 

The Denali website says it draws 5 amps

The DENALI SoundBomb Mini is EASY to Install https://share.google/9k4OHi9uRtVzfeK7c

There are installation instructions on their website, but they don't mention anything about checking the current drain

Instructions_TT-SB.10200_rev02.pdf https://share.google/f3QTDMfx1V7cTcgnz

 

The horn button is merely a make and break supply to the horn. If it is dirty or greasy it could affect the horn on and of.