Extra horn

[jarek_rugby]

Hello,
I am adding extra horn (fanfare) with air pump.
From which place should i take power (+) ?
It will be extra horn working on separate switch.

[Gary Lewis]

Jarek - Does it play any special tunes?  

Seriously though, do you know how much current it pulls?  With a bit of searching I found that some have a max current draw of 20 amps.  So, if yours is the same you'll want to fuse for a bit more, like 25 amps.

The next question is if you want the horn to be able to honk with the key off?  If so, you need a source that is hot at all times.  If not, a keyed source is needed.

If you want it to honk at any time then you could get an accessory fuse holder and wire it to the battery.  But if you want it to be keyed that's another issue since there is only one fused source of more then 20 amps, and that's your heater/Air Conditioning fuse and you don't want to use that.

Anyway, let's see which way you want to go, meaning honk at any time or honk with the key on, before going further.

[jarek_rugby]

Gary,
I need it only when engine is working or as You wrote i need keyed source.
It is one tone, 12  V.
IMG_20190315_193124.jpg

[Gary Lewis]

Jarek - First, instructions on posting pictures are here: Bullnose Forum/FAQ's.  But I've copied the pic in for you - this time.  

And, looking at that pic I see that it includes a relay.  So, you'll need a fuse and you can wire it this way:

EDIT: You could get the switched power from the radio circuit.  It is shown here, but is yellow/black.

[jarek_rugby]

Gary,
i am no so good in electricity and i need more info.
From which "place" should i take "+" for "fuse and 30" ?

[Steve83]

A large ring terminal on the starter relay, going to the fuse holder.  That would be the safest & probably easiest, but not the neatest (because the fuse holder will just dangle in the engine bay).

[jarek_rugby]

This place?

[Gary Lewis]

Yes, the big terminal on the relay where the battery cable goes.

(See, I told you that the forum is better than emailing me.  Steve responded while I was busy.  

[jarek_rugby]

Yaa, You are right :)
Is it importent to which end i'll conect wire with fuse?

[Gary Lewis]

No, fuses are bi-directional - they don't care which way the current flows.  But, as Steve points out, try to route the wire with the other wires in the area, and possibly zip-tie the wire just before and after the fuse holder to the other wires.

And, clean up the battery cable connection to the starter relay while you are doing it.

[jarek_rugby]

I will.
So could i plug it here

[Gary Lewis]

No.  If you connect it there then the horn will only honk when you are starting the engine.  Hook it to the terminal at the bottom where the positive battery cable connects.

[jarek_rugby]

Ok. Thx.

[jarek_rugby]

Finaly works :) I did it :) thx for all

[Gary Lewis]

Yippee!!!  Well done!