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Replacing stock horn with an air horn

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Old Oct 4, 2009 | 11:29 AM
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Congrats! Hope you like the new sound!

Which horns did you go with? Did you replace both horns or only one?

How long did the install take you?

Does anyone one know if on the GTS if I need to go through the wheel liners to access the original horns? I assume my engine bay configuration is similar to the S.

Originally Posted by GreyPepper
I fitted the new horns via the wheel arch covers. A little tricky to get at the wiring connector and the short length of wiring to the horn, but got there in the end. I did not go big horns though, just new and better. Just a little louder.
 
Old Oct 4, 2009 | 02:39 PM
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Originally Posted by Polar993
Congrats! Hope you like the new sound!

Which horns did you go with? Did you replace both horns or only one?

How long did the install take you?

Does anyone one know if on the GTS if I need to go through the wheel liners to access the original horns? I assume my engine bay configuration is similar to the S.
I replaced both horns. Just standard small red snail shell shaped ones ( slightly bigger than originals) The first one took me about 50 minutes ( trouble accessing the small length of wires visible) and the second one about 10 minutes ! I removed the front fog lamp on the second one, which makes access to the wiring much easier.
I should think the GTS is the same setup as the S.
 
Old Oct 4, 2009 | 04:08 PM
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Originally Posted by GreyPepper
I replaced both horns. Just standard small red snail shell shaped ones ( slightly bigger than originals) The first one took me about 50 minutes ( trouble accessing the small length of wires visible) and the second one about 10 minutes ! I removed the front fog lamp on the second one, which makes access to the wiring much easier.
I should think the GTS is the same setup as the S.
Are they direct bolt on? do you have to add any relay or special wiring? will these also change the alarm sound on the car or just for honking? Do you have the link the the horns? Thanks.
 
Old Oct 4, 2009 | 07:30 PM
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I ordered one Hella horn. It has two trumpets, but the two trumpets replace only one horn.

How do I disconnect the second horn that is not getting a replacement? I simply want to disengage it but need to make sure by doing so that it doesn't thow a warning light.
 

Last edited by Polar993; Oct 4, 2009 at 07:37 PM. Reason: Type-o
Old Oct 5, 2009 | 06:02 AM
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there are no warning lights connected or concerned with the horns.
you will have no dramas there.
 
Old Oct 6, 2009 | 06:54 AM
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This is the view of the wheel arch screws removed and the view behind the panel. Notice the original horn removed from its bracket above. This method however gives you very limited access to the wiring. Removing the fog light( very easy) gives much better access and view.
 
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Old Oct 6, 2009 | 06:53 PM
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Thanks for taking the time to take pictures for the rest of us that has not seen it. It will make it so much easier when our time comes... A picture is worth a thousand words so thanks for two thousand words!
 
Old Oct 20, 2009 | 03:09 AM
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So I finally got my air horns installed last weekend. I had my mechanic do the install....took about 30 mins per side.

I ended up replacing both stock horns on the GTS with Hella dual trumpet air horns. They work great and sound great, BUT....I keep blowing a fuse when I press the horn for longer than 1-2 seconds.

It's fuse #16, and it's a 20amp fuse. I suppose the amperage with the two air horns is too high for the 20amp circuit/fuse.

Does anyone have any suggestions on how to remedy this problem? The horns themselves do not have fuses as they were wired directly to the oem wiring.

Is is possible to replace the 20amp fuse with a 30amp fuse? Excuse my ignorance, but I'm not an electrical engineer, so I don't know if this is even possible.

Any help would be greatly appreciated!!!!
 
Old Oct 20, 2009 | 03:36 AM
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i had excatly the same problem, there are 2 remadies.
firstly you can simply uprate the fuse, i did and it works just fine.
secondly you can add relays (the proper solution)
both work fine.

good luck.
 
Old Oct 20, 2009 | 09:34 AM
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Awesome.....so I can simply change the 20amp fuse in the fuse box near the driver's door to a 30amp fuse?

As long as by doing so doesn't screw anything up, I prefer to go that route, as accessing the horns and installing a relay is a pain in the a$$.

Please confirm and I'll switch out the fuse.

Thanks ONE234!!!!!!

Originally Posted by ONE234
i had excatly the same problem, there are 2 remadies.
firstly you can simply uprate the fuse, i did and it works just fine.
secondly you can add relays (the proper solution)
both work fine.

good luck.
 
Old Oct 20, 2009 | 09:43 AM
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thats all i did.
for piece of mind when you change over the fuse leave the fuse cover off and watch the fuse as you sound the horn for 5 secs or so, that way you will see if there is any dramas.
im not sure of the current surge of both your horns but it worked/works perfectly for me.

give it a go, its only a fuse and that will give before anything else.
 
Old Oct 20, 2009 | 09:30 PM
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Did you use a 30amp fuse?
 
Old Dec 6, 2012 | 05:15 PM
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I want a scary sounding horn! Mine now is broken, and sound pathetic. People laugh when they see a matte black cayenne with a weak sounding horn. My friends horn on his CS is also broken, but his has a deep grunty sound, so he does not want to fix it
 
Old Dec 7, 2012 | 10:14 AM
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haha. I had the same problem too. Honking my horn was just downright embarrassing in traffic and had no affect. So I bought some big mothers (with the red body, not sure the brand, Hella maybe) and installed them and they are loud as hell and provide the intended message now.

My alarm horn is still embarrassing though!! LOL oh well.
 
Old Aug 24, 2018 | 08:10 PM
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Marco Tornado & Marco Hurricane

What are installed is one Marco Tornado & one Marco Hurricane, together. The tornado is a 112 db dual-tone horn using frequencies 520 & 660 Hz and the Hurricane is a 110 db single tone horn using a frequency of 310 Hz. Together they make for a very loud tri-tone horn.

I used the original horn wire as the trigger to an 80A relay along with a 40A resettable automotive breaker. The relay is fed by a larger gauge wire that comes from the jump post under the hood on the driver's side and it grounded to the ground rod in that same area. The heavy gauge red 12v feed wire goes through the 40A breaker then to the 80A relay. Since I used the OEM wire a the relay trigger, that wire is already fused and then the horns are fused by the 40A breaker.


Horns mounted and wired in factory location



40 A Resettable Breaker (small fuse holder you also see here is for my Battery Tender hook-up, not the horns circuit)



80A SPDT Relay that feeds the horns



Hurricane Horn Specs


Tornado Horn specs
 
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