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Replacement Horns

N

Nik

Tuned and Synch'ed
Joined
Oct 21, 2011
Messages
34
Location
Ashford, Surrey
Hi
Am putting a pair of horns on my Stelvio.
Two horns, 4 pin relay, lots of wire.
Am going to try and fit them in the upper air duct in the side fairing covers, may need to create a mounting bracket as there's nothing near to fasten them to.

Anyone have a wiring diagram/ hints+ tips please.

Best regards
Nik
 
Try a search here for all sections, plenty of posts on the subject.
 
GT-RX
Thanks for your reply. I've searched the site as best I can as you say there are a lot of posts but I can't find a simple wiring diagram for wiring in 2 horns. I don't need the bikes full wiring chart. Sorry to be so 'high maintenance'.
Best regards
Nik
 
Usually the wiring kit to add a second horn will cover it, or are you just adding one on your own?

Posted for future use:
 

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Hi
Two completely new horns and making up the wiring myself. Only using the two wires to the original horn.
Hope this helps and thanks for your help.
Best regards
Nik.
 
Does the original horn use a relay, if not you could burn out the horn switch with too much current passing through it. On my Breva I installed a relay and used the original horn wires to operate it. This in turn operated a compressor for 2 air horns.
 
Kevin.NZ said:
Does the original horn use a relay, if not you could burn out the horn switch with too much current passing through it. On my Breva I installed a relay and used the original horn wires to operate it. This in turn operated a compressor for 2 air horns.
Click to expand...

The Stelvio does NOT use a stock relay. The horn button is huge metal pieces and unlikely to be damaged. But the stock wiring will not handle the current very well.

I ran my dual Fiamms from the stock wiring. Occasionally one of the horns would fail to kick on due to the weak wiring.
I ran a fused hot wire from the battery to a relay, used an easy frame ground. Made a bit difference in the sound level too.

I mounted the horns on each side of the oil cooler.

As for the schematic. A quick Google gets you:
http://bit.ly/UeK9Q0
 
Thanks all for your help. Yes I had planned to use a fused wire from the battery to the relay and find an earth on the frame. I was mainly after which wires go where on the relay.

I have also looked at siting them by the top of the oil cooler but really wanted them hidden away.
I like a bit of 'stealth' noise! LOL.
Cheers all
Nik.
 
Not to be talking down to anyone...but you can get your relay info here: http://www.bcae1.com/relays.htm

I'd recommend using the OEM horn + connection (check with a volt meter to make sure you are correct) as the trigger for your new relay. Then connect a + fuzed wire from the battery to the relay. The relay will have a ground connection and you can find lots of good places for that. Finally, connect the horns to the switched output from the relay. It is important to use large enough wire on the battery-to-relay circuit as well as the relay-to-horn. These horns really gobble up electrons and you don't want to choke off that supply if you want loud horns.
 
Nik said:
Thanks all for your help. Yes I had planned to use a fused wire from the battery to the relay and find an earth on the frame. I was mainly after which wires go where on the relay.

I have also looked at siting them by the top of the oil cooler but really wanted them hidden away.
I like a bit of 'stealth' noise! LOL.
Cheers all
Nik.
Click to expand...
I just finished installing a pair of horns from a GL1500 Gold Wing. Really wanted GL1800 horns but couldn't find any other than new. I installed 1-to-2 splitters on each terminal of the left horn and plugged the bike's original wires onto that horn. Then I made a harness for the right horn from 16-gauge wire with heat shrink covering all but 3" on each end. The original horn was removed, and with the lower oil cooler bolt out, the new harness slipped under and behind the oil cooler. Finished by attaching the new harness to the right horn and to the remaining terminals at the left horn. The bike now sounds like a big ol' American car when the horn button is pressed, and no warmth can be felt either on the wires or terminals, even after 10 seconds of continuous use. So I'm not worried about the wiring and didn't use a relay. Ymmv.

For location, I removed the side panels and the cadmium colored 13mm hex nuts/studs that are used as stand-offs at the lower front of each panel. Then used the nuts/studs to secure the horn brackets with the front side of each horn facing the outside of the bike. The horns are completely hidden with the panels reinstalled. I have a pic of the install if you need it.

Stu
 
Thanks all very much for the diagrams and the advice.
I'm almost there now and have devised a mounting bracket to go from the same location as in Stu's post but is bent enough to site the horns completely in the upper air duct of the side panels. Totally out of sight. I made them out of some 10" shed door hinges so should be man enough to cope with the vibrations. All now sprayed and lacquered, looking good.
Thanks all again, now to go riding and frighten the good people of London if they transgress.

Best regards
Nik.
 
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