http://www.the12volt.com/relays/relays.asp

On Wed, Aug 21, 2013 at 3:48 PM, mark drillock <mdrillock@cox.net> wrote:

> Almost, the trigger is a ground from the horn button.
>
> The power line to the horn gets split off to also feed 86 of the relay
> trigger, constantly. Then 85 is wired to the horn button wire and the
> horn button grounds 85 when pressed. So the button ground is the real
> trigger.
>
> Mark
>
>
>
> Jim Felder wrote:
>
>> So, big 12v wire straight to the horn, big ground wire interrupted
>> through the relay at  85 and 86, with the trigger and ground as usual?
>>
>> Jim
>>
>>
>> On Wed, Aug 21, 2013 at 5:17 PM, mark drillock <mdrillock@cox.net
>> <mailto:mdrillock@cox.net>> wrote:
>>
>>     Yes, the relays with a mounting tab can be handy, like the one in my
>>     photo has. Your description of your use of pins 85 and 86 is not
>>     what I did at all for the horn usage though. I guess I will post
>>     more details about the relay wiring at a later time. Because it is a
>>     horn circuit we are actually using the relay for controlling a
>>     ground wire after the horn rather than the more common usage for
>>     controlling a power wire before the power consumer. Electrically it
>>     amounts to the same thing but people visualize it differently.
>>
>>     Mark
>>
>>
>>

--
Casey