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Dave, if those are the old style Windtone horns, like the ones on my TR3, =
check the insulators on the relay mechanism inside the horns.=C2=A0 One of =
mine started breaking down and created a short to ground.=C2=A0 I made a re=
placement out of some modern thermoplastic and restored proper operation.
If that is a 20 amp SAE fuse 17 amps will be handled easily by the fuse.=C2=
=A0 It is rated to carry 20 amps continuously and will trip at 35 - 40 amps=
.
=20
Dave=20
=20
=20
-----Original Message-----
From: Dave Connitt <dconnitt@fuse.net>
To: Triumphs <triumphs@autox.team.net>
Sent: Wed, Jan 27, 2021 2:50 pm
Subject: [TR] TR4A Horn Question
Hi All,
One of my winter projects is to determine why the horn fuse in my TR4A keep=
s blowing.=20
I had installed a Advanced AutoWire harness during the restoration. The har=
ness contains a 20 amp fuse for the horn. The horns are new as of the resto=
ration. I went through the wiring harness and could not find a issue there =
so now I am looking at the horns themselves and that is where I need your h=
elp. I measured the horn coil resistance and it is 0.8 ohms in both of them=
. If I use 13.8 VDC as my battery voltage, I get 17.25 amps at the fuse whi=
ch is too close to the 20 amp fuse rating in my opinion. If the resistance =
was even 0.9 ohms, the fuse current would be a little over 15 amps which wo=
uld make more sense. Does anyone know what I should see as a horn coil resi=
stance on a good horn?
Thanks in advance,
Dave Connitt=20
Sent from my iPhone
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
sey@cs.com
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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">Dave, if those are the old style Windtone horns, like the
ones on my TR3, check the insulators on the relay mechanism inside the
horns. One of mine started breaking down and created a short to
ground. I made a replacement out of some modern thermoplastic and
restored proper operation.</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">If that is a 20 amp SAE fuse 17 amps will be handled easily
by the fuse. It is rated to carry 20 amps continuously and will trip at
35 - 40 amps.</font><br>
</div>
<div> <br>
</div>
<div style="clear:both"><font size="4">Dave </font><br>
<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: Dave Connitt <dconnitt@fuse.net><br>
To: Triumphs <triumphs@autox.team.net><br>
Sent: Wed, Jan 27, 2021 2:50 pm<br>
Subject: [TR] TR4A Horn Question<br>
<br>
<div dir="ltr">Hi All,<br>
</div>
<div dir="ltr">One of my winter projects is to determine why the horn fuse in
my TR4A keeps blowing. <br>
</div>
<div dir="ltr">I had installed a Advanced AutoWire harness during the
restoration. The harness contains a 20 amp fuse for the horn. The horns are new
as of the restoration. I went through the wiring harness and could not find a
issue there so now I am looking at the horns themselves and that is where I
need your help. I measured the horn coil resistance and it is 0.8 ohms in both
of them. If I use 13.8 VDC as my battery voltage, I get 17.25 amps at the fuse
which is too close to the 20 amp fuse rating in my opinion. If the resistance
was even 0.9 ohms, the fuse current would be a little over 15 amps which would
make more sense. Does anyone know what I should see as a horn coil resistance
on a good horn?<br>
</div>
<div dir="ltr">Thanks in advance,<br>
</div>
<div dir="ltr">Dave Connitt <br>
</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Sent from my iPhone<br>
</div>
<div dir="ltr">** <a ymailto="mailto:triumphs@autox.team.net";
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **<br>
</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Donate: <a href="http://www.team.net/donate.html";
target="_blank">http://www.team.net/donate.html</a><br>
</div>
<div dir="ltr">Archive: <a href="http://www.team.net/pipermail/triumphs";
target="_blank">http://www.team.net/pipermail/triumphs </a> <a
href="http://www.team.net/archive";
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</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Unsubscribe/Manage: <a
href="http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com";
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</div>
</div>
</div>
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