Fitting a High Tone Horn

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Poppy1

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I see in the forum pics section someone has managed to fit a high tone horn next to the foglight - behind the cover plate. Mr Tait says this sounds far better. Anyone had a go at this before?

2003 FSi SE in Ebony Black Pearlescent; Climate; DIS; Winter Pack; Sports Steering Wheel; Copilot Light and Upgraded bulbs
 
Hi
Poppy 1
Fitting the High tone horn along with the standard Low tone makes a world off difference to the sound quality, try it you wont be disappointed
Regards
[24]Bill
 
hello
When you fit the extra horn do you have to upgrade the fuse in the fuse box for the system since fitting the extra horn increases the load on the wiring .
When i went to halfords the guy said i would need to increase the fuse rating.
Also are the horn wires the one's that are clipped to the metal strut near to the main light wires, on the drivers side.

cheers

Andy

A.D.Simmons
 
Hi Andrew
You do not have to upgrade the fuse for the horn as the horn fuse has been made heavy enough 25A to cope with the sky roof system whether it is fitted or not.
And yes the horn (twin) wires do run down behind the driver side headlamp and into the bumper area.
Regards Bill
 
Is the horn fuse used for the opensky system ??

Does it open when you honk ??

Dennis de Held

Amulet Red 1.4 Tdi
 
Hello,

I have fitted some extra loud horns on my car. It is for safety, I do not want to get ignored when the turbo kicks in.

What you should do is to use a relay, and only draw the control current to the relay from the existing wiring to the orignial horn. If you buy a compressor horn from almost any supplier, they usually have a electrical installation drawing along with the hardware. If not, I can make one for you. By using a relay, you do not overload the original wiring or fuses.

I always use relays when I am adding something electrical to the car (besides the LEDs that draw very little current). The relays are connected to a +12V lead from the battery, or from the connection points that you have in the foot well on the drivers side. With a multimeter you can figure out what is ground and what is +12V. All relays I use have fuses (on the side towards the +12V connection), from 1A for my strobe lights to 30A for the multimedia entertainment system.

For the horn wiring, the simplest way to get the control current for your relay steering the new horns is to piggy back coupling the existing wiring in the engine compartment. The horn is located on the right side, beneath the bumper. Get someone to honk the horn while you searh for it :) if you can find it.

If you want to hack into the fuse box, it is fuse 8 (15A) that gives the current to the Open Sky slidng sunroof motor and to the original dual tone horn relay. Note, this is the current to the relay, not to the horn itself. Dennis de Held jokes about the opening of the sunroof if you honk, but this will not happen. The fuse 8 is connected to terminal A98 - which is positive connection in dash panel wiring harness (aka central +12V connection point).

So this will not help you a lot beside giving you a constant +12V connection. I recommend you use the wires going to the original horn to control your relay for the new horns.

These can be found in the engine compartment: 1.5mm2 brown wire going to ground/earth connection in right headlight wiring harness, 1.5mm2 gray/blue going to the 17-pin connector, green, in connection point in A pillar right hand side. It is the latter one you should get your control current from.

Hope this helps.

Rune K.
Audi A2RS
 
Rune,

If I keep the current to the new horn below 15A (and I don't have open sky) would you then still recommend using a relay ??

My Precious is a company car. But I dislike the silly horn. So I want to change it with the least amount of changes to the car.

Thanks

Dennis de Held

Amulet Red 1.4 Tdi
 
Deheld
If you check number 8 fuse for the horn and the sky roof system it should be a 25amp fuse not a 15amp and if you intend fitting an additional Hi tone electric horn similar to the standard Low tone one fitted, you should not have to make any changes, after all how long do you normally hold the horn button down for?

Regards
Bill
 
Hello,

If you do not want to add any extra relay, then you should be OK with disconnecting the original horn and just connect the new horn to the orignal wires. What I have done is to keep the original horn in addition to the compressor horn. This is for safety reasons, I once experienced that my compressor horn did not work (not on the A2, but on my other Audi). This was the only time I really needed it to work (my wife was going to the hospital to give birth to my youngest son), and I had removed the original horn.

So, the choice is yours. It isn't that many extra wires to add, and who would you believe checked the engine compartment of your company car when you deliver it back to your (leasing) company ?

I still recommend add the extra wires and the relay. It is a much "cleaner" installation, and the extra Euros it cost to have the relay and wires should not be a problem.

If you want, I can install the extra wires and the horn in July....

Rune K.
Audi A2RS
 
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