Stebel Nautilus wiring question

[AdrianS]

Following on from a recent thread it was mentioned that the Nautilus could be connected to the existing wiring and that the BMW relay was OK to use.
Installed mine today on my R1150R and it blew the fuse after the first use.
It is a 7.5 amp fuse which blew and on replacing the fuse and reconnecting the original horn all was ok.
I believe the fuse also supplies the auxiliary socket.
What have others done to use the existing wiring? Not keen on just increasing the fuse value.

 

[bisbee]

A Nautilus drags circa 18 amps iirc So a relay is a must before you fry something Do a search it will reveal wiring diagrams a plenty

 

[Edward]

The Clymer manual (not always 100%) wiring diagram shows that the original horn is operated through a relay so you should not need another one.
In the previous thread about the Stebel someone posted they had fitted a few without the another relay without problems.
Is the horn a genuine Stebel or a copy which could be faulty?

 

[YYguy]

I participated in that thread too. I've seen conflicting info on this so decided to err on the side of better safe than sorry and ordered the horn plus wiring and a relay yesterday. Your post clarifies that I made the right decision. At least it's an easy fix for you.

 

[AdrianS]

Bought a genuine one.
Worked once then blew the 7.5 amp fuse!
I was surprised to see that others had no problem fitting it to the existing wiring when on the Stebel packaging it mentions 18A current.
I wonder if those who got away with the existing wiring had a much higher fuse fitted to that circuit?
Anyway, going to have to lift the tank now to access the battery terminal. Give me a chance to bleed the ABS system and fit a new battery as the old one is getting a little tired!

 

[YYguy]

Bought a genuine one.
Worked once then blew the 7.5 amp fuse!
I was surprised to see that others had no problem fitting it to the existing wiring when on the Stebel packaging it mentions 18A current.
I wonder if those who got away with the existing wiring had a much higher fuse fitted to that circuit?
Anyway, going to have to lift the tank now to access the battery terminal. Give me a chance to bleed the ABS system and fit a new battery as the old one is getting a little tired!

I'm curious about that too. The wire and relay kit was only an extra 12USD so I decided it was worth the insurance. Plus I'm adding a fuse panel anyway so I'll be in there and it didn't really add much work.

 

[Steptoe]

Two different Stebel horns are available and people get mixed up between the two when posting how they fitted theirs without a relay.

One requires a relay, the other is a straight fit.

 

[Belper phil]

One requires a relay, the other is a straight fit.

Ye, mine was a straight swap

 

[Loiq]

how do you know which is which?

 

[davegs]

Horn

All you need to do is run a new pair of good size cables from the battery putting a fused in the positive near the battery
to ,a new relay mounted as close as possible to the horn. These should be connected thus; the negative to the horn and the positive from the battery to on of the SWITCHED contacts on the replay from the other SWITCHED contact a cable to the horn. Now connect the coil terminals on the new relay, to the old horn connections on the original relay. Thus the horn circuit
remains as was all the happens is the original relay now operates the new relay instead of (or why not both for a bit more noise?) the thick cables are required owing to the high current used by the new relay and will prevent volt drop and loss ,of performance, when you've only got twelve volts to start with you do not want to lose any!. That's how I did it on my 1150 and it is nice and loud.

 

[slimbo]

just do yourself a big favour and fit with a relay , no isues and safer...!

 

[torp]

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=291092563943

comes with relay, wiring, everything to make your like simple!

 

[nud1e]

The Nautilus draws 18A so would need a relay.
The Magnum takes 6A and doesn't need a relay.
Have a look at http://www.stebel.it/public/stebel.pdf for more info
You may note that there is a 3db difference between the Nautilus and the Magnum as well as a significant difference in size.
From the Yamaha Sound Reinforcement Handbook "It turns out that a sound which is 3 dB higher than another is barely perceived to be louder; a sound which is 10 dB higher in level is perceived to be twice as loud."
With all the fitting hassle, the Magnum is the better buy.