Neat site. Bookmarked.

Jim

[We have] socialism for the rich and rugged free market capitalism for the poor.
-- Martin Luther King, Jr.

On Aug 21, 2013, at 3:52 PM, Zeitgeist <gruengeist@GMAIL.COM> wrote:

> 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