Additional aa oo gaa horn install Help

[mcalva]

Hi.
I would like to mount an additional aa oo gaa horn as "fun" on my f3, respecting the original with a switch to select one or the other.
The positive should come out from the electrical socket for user accessories and the negative would be the one that comes out of the
horn's push button.
I would like to do it as sure as possible and install a relay to not to damage the horn button.
Any suggestion? I saw an outline where
it was explained, but now I can't find it, now.
Thank you in advance

 

[spyder01]

If the oogah horn draws a small amount of current like the original horn does then you dont need a relay.The relays are needed for the air horn like the Wolo Bad Boy like I have ,although many guys aren't even using a relay with those and they work fine.So if you dont need a relay then just get a DPDT toggle switch and hook the original horn wires to the middle 2 terminals and then a pair of wires from the left side to the new horn and a pair of wires from the right side to the old horn.Try to keep the polarity the same but it may not matter much.

 

[Grandpot]

Here's a link to a video I did on installing a horn relay. You will need to modify it to install the selector switch.
https://www.youtube.com/watch?v=Frhi-ShgY_c

 

[IdahoMtnSpyder]

Hi.
I would like to mount an additional aa oo gaa horn as "fun" on my f3, respecting the original with a switch to select one or the other.
The positive should come out from the electrical socket for user accessories and the negative would be the one that comes out of the
horn's push button.

Don't think so, if I understand what you're saying! Most all devices on the Spyder are switched on the ground side of the device, i.e., the horn button is between the horn and ground. The power side of the horn is connected directly to 12 volt power. You could use a single pole 3 way switch and switch the power wire between the two horns, or OEM horn and a relay coil. Connect the ground side of the horn or relay to the ground side of the OEM horn.

 

[RICZ]

Note that the wires coming from the horn button has a live positive. When the button is pressed, that completes the negative circuit.

 

[mcalva]

I have a lot to learn. So I'll start by looking at the electrical diagram.
If the amperage was similar I'd have not problems but I don't know.
Is it possible to measure it?
I will explain how it ended.
Thank you very much!

 

[mcalva]

Duplicated. I'm sorry.

 

[mcalva]

Do you think these are correct?



Thank you!

 

[IdahoMtnSpyder]

Duplicated. I'm sorry.

Great sketch! Lot better than what I usually draw! That will work just fine. Good way to go.

 

[mcalva]

OK. Now I have everything to start mounting my complementary agoohaaa horn. Fuse, porta fuses, relay, connectors, horn …… but now, I, as the rest of the people, over here, can not go to the car park to look my Spyder neither work on it. So, doing a little memory exercise I think fuse and relay will not be a problem to install but where do you thing I could install the horn?
As I have not anything better to do, I’ve been thinking about the best position to install a horn. Looking up, down, front or rear. Is it really important?
I do not in States, here we say that something as: “when the dog does not know what to do it kills flies with its tail” �� Thanks again.

 

[spyder01]

Nice diagram but I think a 25 amp fuse may be way too much but you can just check the specs for your new horn.

 

[Grandpot]

The rating of the fuse should be equal to or less than the current capacity of the smallest wire in the circuit. The purpose of the fuse is to keep the wires from overheating and starting a fire. The physical placement of your fuse is correct.

 

[mcalva]

Yes. I agree. 25 Amp. may be too much. I will try to find the specifications. Unfortunately I threw away the blister.
Thank you very much!

 

[Grandpot]

Don't worry about the horn current. Look up the maximum allowable current for the smallest wire in the circuit. If the horn draws more current than the wires allow, you will need larger wires.

 

[mcalva]

Don't worry about the horn current. Look up the maximum allowable current for the smallest wire in the circuit. If the horn draws more current than the wires allow, you will need larger wires.

I think I don't understand it well. :dontknow:

If the consumption is of a certain amperage, I will need cables of a different diameter. So the higher the consumption, greater wire's diameter.
Then fuse should be the closest amperage to the horn consumption. I would need to know the horn amperage to calculate the wire diameter and fuse.
I think if I connect the ammeter, serial mode, on the positive wire before the horn I will find out.

 

[ThreeWheels]

Hi.
I would like to mount an additional aa oo gaa horn as "fun" on my f3, respecting the original with a switch to select one or the other.
The positive should come out from the electrical socket for user accessories and the negative would be the one that comes out of the
horn's push button.
I would like to do it as sure as possible and install a relay to not to damage the horn button.
Any suggestion? I saw an outline where
it was explained, but now I can't find it, now.
Thank you in advance

Sounds like a great idea. Do you have a link to the horn you bought ?

 

[mcalva]

Something like this. Mine is in red. I bougth in 2016 for my RT but never mount it.
Now is the time.

https://www.amazon.es/Antique-Vintage-Sirena-AHH-OOO-GAH-AHOOGA/dp/B07DNJPYBC/ref=sr_1_13_sspa?__mk_es_ES=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=old+car+horn&qid=1588876424&s=automotive&sr=1-13-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExN0NEMVBQSFlSQUxXJmVuY3J5cHRlZElkPUEwNDk1MTMyMUNZTUxRNVVINDdHMyZlbmNyeXB0ZWRBZElkPUEwMjMzMTA3MTAyR0pKQ1NHSlZLQSZ3aWRnZXROYW1lPXNwX210ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=