Old thread I know but it inspired me because I just picked up a 2015 and the horn is still pitiful.
So I fitted a Dinali Soundbomb Split. It's stupidly loud. Great!
My install was a bit of a rush job using what I had to hand and I'll revisit the compressor cable tie solution and tidy the wiring into some heatshrink another day. I'm still happy enough with it though.
Anyhow, here's how I did it in a couple of hours and will be happy to hear tips on how you did a tidier one.
For anyone interested;
In addition to the horn
http://www.rg-racing...T-SB10100B.aspx (comes with a couple of basic mounting options and relay)
you'll need some extra cable ties, spade connectors and maybe blade connectors to suit, an inline fuse and a 15 or 30 amp fuse.
You'll remove both sides, frontnand bottom of the bellypan. Easy enough, just take out all the screws you can find. The little tray underneath also attaches via a peg through a rubber grommet. Ease it downwards and it'll come off.
Unbolt the existing horn and ease off the connectors. The one with the purple-ish wire is the switched live.
Now connect the air hose to the soundbomb and offer it in making sure to get it snug in the recess with the horn sound outlet facing front and bottom.
Route the air hose over the top and out.
I used the multistrip mounting from the original horn, bent it to better suit my position and fixed it in as you see in the photos with some extra washers for good measure.
I then used some builders fixing band (like this
http://www.wickes.co...mx10m/p/246015#) to make a fixing that the original horn bolt secures and it hooks round the sound opening on the soundbomb. Might be think overkill, but your choice. You might also have the skill/time/materials or tools to do something more elegant.
Now remove the battery clamp and follow the diagram that came with the horn for the wiring.
I used a 15 amp fuse (didn't like the idea of a 30 amp) and it all works fine.
Tuck the relay up and out of the way using a cable tie to secure it. I was able to put it just behind the battery.
Make sure you have enough pos and ground cable to reach the compressor which will be just under the lower tank body panel, in the trellis frame.
Offer the compressor in (You might need to ease some existing cables out if the way) but don't secure it yet.
Now route the compressor hose and cable up to where the compressor will be and connect the pos and ground cables to it.
Test your horn button and make sure you've got a good tight grip on the compressor before you do.
It should whizz. If not, back up and check your wiring.
Connect the compressor hose after trimming it to the right length.
Secure the Compressor using as many cable ties as you see fit (I used 2 x 10mm).
Again, if you figure a more elegant solution, post it please so we can copy your genius.
I also put some pieces of rubber between the compressor and frame to protect both.
Now hit the horn button but make sure it's not early in the morning or late at night and that there is no-one nearby that has a heart condition ;o).
enjoy.
