[s-cars] [Fwd: Stebel Air Horn]

[Jerry Scott]

Why could you not just use a SPDT switch without the relay?  I know that 
the switch would be carrying the full current of the horn, but maybe 
this is not so bad.  The only reason that horns are relayed is to keep 
the horn button from arcing and eventually burning up the contacts. It 
also reduces radio interference.  The SPDT switch would not be switched 
while the current is flowing, unless you were to hold the horn button 
down while moving the SPDT switch.
Jerry

Steve Powers wrote:

>you'll want a relay with normally open (N.O.) and normall closed
>(N.C.) contacts, e.g. an SPDT relay like these:
>
>http://www.rallylights.com/hella/Relay_Mini_SPDT_12v.asp
>
>go to this page: http://www.rallylights.com/hella/Relays.asp, and look
>at the SPDT diagram.
>
>here's how to wire the relay to enable normal horn operation and to
>enable stebel operation when high beams are lit.
>
>wire horn signal to terminal 30
>stock horn positive to terminal 87a (terminal connects to 30 when relay is off)
>wire stebel horn postive to terminal 87 (terminal connects to 30 when
>relay is on)
>wire terminal 85 to chassis ground
>wire stebel horn negative to chassis ground
>wire terminal 86 to some signal, e.g. high beams, that goes to 12V
>when active. you can substititute almost any function - low beams,
>wipers, brake lights, etc. to trigger the relay to honk the stebel
>horm (horn switch must be pressed also)
>
>pat attention to this page when wiring your horns.
>http://www.rallylights.com/useful_info/horn_wiring.htm
>
>
>Steve
>
>
>
>
>On Fri, 18 Mar 2005 11:10:38 -0600, James Murray (QA/EMC)
><james.murray at ericsson.com> wrote:
>  
>
>>hmmm... 1st steering press activates the Audi horn, 2nd press activates the Stebel... sort of like a tap on the shoulder, then a bat across the head... ;-)
>>
>>-----Original Message-----
>>From: s-car-list-bounces at audifans.com
>>[mailto:s-car-list-bounces at audifans.com]
>>Sent: Friday, March 18, 2005 12:10 PM
>>To: s-car-list
>>Subject: [s-cars] Stebel Air Horn
>>
>>I am wondering if it would be possible to wire the Stebel so that you
>>could select either the standard Audi horn or the Stebel.  Of course you
>>would want either to be activated by the steering wheel horn button. If
>>someone comes up with a relay and switch to do this, please post.
>>Jerry
>>
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>>    
>>
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>