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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Quzzy on April 30, 2020, 01:39:38 PM

Title: Additional horn relay...answered thanks
Post by: Quzzy on April 30, 2020, 01:39:38 PM

Have just ordered a Denali Soundbomb horn, it comes with a relay which I would happily use, but as theres an existing standard relay, is it necessary?
If I just use the existing, perhaps I should beef up the wire from that to the horn?

thanks

Title: Re: Additional horn relay...necessary?
Post by: kioolt on April 30, 2020, 04:50:04 PM

It would depend on what the amp rating is on the oem relay and how much more the Denali uses.  When I installed a Denali Soundbomb on my bike I determined that there was an increase  in current draw that was enough to be concerned about.  I don't remember how much but I decided it would be prudent to install the relay and bigger gauge wire.

Title: Re: Additional horn relay...necessary?
Post by: Quzzy on April 30, 2020, 05:05:09 PM

Thannks, did you use the OEM relay to trigger the additional one?

Title: Re: Additional horn relay...necessary?
Post by: Martin on April 30, 2020, 05:29:41 PM

I fitted a Nautilus 140 Db air horn and used the OEM  horn wire to trigger it. I had it configured that I could switch between the OEM horn and the air horn plus the OEM. I was originally  told that the 140 Db horn was illegal but have since found out that it is not a problem.
Regards Martin.

Title: Re: Additional horn relay...necessary?
Post by: The Mighty Gryphon on April 30, 2020, 07:29:31 PM

The OEM horn relay has contacts rated for 30 amps.  The 15 amp fuse that supplies the horn will blow before there is a problem with the relay or the wiring.

The relay supplied with the aftermarket horn is to protect the horn button contacts on bikes that don't already have a relay.

Title: Re: Additional horn relay...necessary?
Post by: Quzzy on May 01, 2020, 03:24:30 AM

Thank you gentlemen, thats all I need to know.
Q