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<p>Using a relay (as I had originally thought <i>might</i> be
there... but wasn't, and Theo recommends) would simplify the
situation<u> if the horns are actually grounded already</u> as you
state. The already present 12v+ near the horn would become the
relay input (30) and loop to provide 12V+ power to the relay coil
(85). The ground-able horn contact would provide ground to the
relay coil - (86) and complete the 12V+ circuit providing 12V+
power output (87) to the horns. The numbers refer to the typical
relay designations. And, yes the 12V+ just daisy chains to the
next horn also.</p>
<p>So, the ground is constant at the horn. 12V+ is constant at the
relay input and the coil +. Grounding the horn at the steering
wheel ring will trigger the relay to close and send 12V+ to the
horns.<br>
</p>
<p><img src="cid:part1.sINtAvPe.oolUFZaK@verizon.net" alt=""></p>
<div class="moz-cite-prefix">On 9/24/2023 5:41 PM, Robert Wanty
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOCAEMWb4=OuPbNbY+dAttKZS8Wk3iT6H3rpTcu1B9tJEzHt4A@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Thanks for the responses.
<div>
<div>Everything is wired to the horns, they look original.
There are 2 purple wires to each horn, one is hot from the
fuse box the other wire goes to ground when the horn ring is
pressed. When I plug the hot wire to the horn it works
fine, even honks. So the horns must not be original since
they are grounded to the frame. I still have 4 purple wires
when I only have connections for two and the wiring diagram
only shows two wires, one to each horn.</div>
</div>
<div>So should I isolate the horn frame ground, plug the hot
wire to the horn, use the existing jumper between the horns
and connect the horn ring wire to the other horn?</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Sep 24, 2023 at
1:50 PM Theo Smit <<a href="mailto:tsmit@shaw.ca"
moz-do-not-send="true" class="moz-txt-link-freetext">tsmit@shaw.ca</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">
<div dir="ltr">Correct except that Rootes (or Lucas) would
never use a relay where they could instead pass all the
current through a finicky sliding contact. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Bob, the horns, when properly adjusted, draw
about three amps each. It would be a good idea to wire in
a cube type relay so that the ring contact does not have
to pass that much current. </div>
<div dir="ltr">If you like I can draw up a wiring diagram
for that. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Theo<br>
<blockquote type="cite">On Sep 23, 2023, at 10:52 PM, Tom
Witt via Tigers <<a
href="mailto:tigers@autox.team.net" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">tigers@autox.team.net</a>>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<p>I believe most horns have a relay and the 12v+ is
already at said relay. When the horn ring makes
contact it GROUNDS the relay (completing the circuit)
and the relay contact points connect. That passes
through the 12V+ to the horns. So, typically the horn
ring simply grounds the relay to activate it. Sorry
too late for me to check the manual for Tiger
specifics but MOST cars function that way.</p>
<p> Think of yourself standing at a light switch in the
house. When someone presses you on the shoulder
(connecting to ground) you and the switch act like the
relay moving the switch to the on position. This then
send power to the light (horn). When the person
pressing on your shoulder releases you turn the switch
off. Hope that helps.<br>
</p>
<div><br>
</div>
<div>On 9/23/2023 5:59 PM, Robert Wanty wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I am working on wiring the horns for
the first time since my 15 year restore. I am
working with the original wiring harness and horns.
Starting at the horns there is one on each side
with a jumper wire between the two horns, there are
2 purple wires leading to each horn, one wire on
each side is hot and wired to the fuse box the
second wire is not hot or grounded. I installed a
new horn ring from SS and have one wire from the
contact on the horn ring and a second wire for the
circle contact off the signal switch, I think the
wire for the circle contact should be hot but I
don't seem to have a connector for it in the harness
under the dash and nothing for the wire to the horn
ring.
<div>It would seem to me that I should have a hot
wire to the ring contact then a hot to the horns
when the horn ring is pressed. but the wiring
harness does not seem to follow that way of
thinking.<br>
<div>The wiring diagram is some help but as usual
my limited knowledge on this will probably start
a fire.</div>
<div>Any help would be appreciated, I would rather
not rewire the circuits so hopefully I can
restore the Lucas <a href="http://system.to"
target="_blank" moz-do-not-send="true">system.to</a>
its original splendor.</div>
<div><br>
</div>
<div><br>
</div>
<div>Bob </div>
<div> </div>
<div><br>
<div> </div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
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