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Re: [Healeys] Ignition Circuit

To: Patrick & Caroline Quinn <p_cquinn@tpg.com.au>
Subject: Re: [Healeys] Ignition Circuit
From: Roger Grace <roggrace@telus.net>
Date: Sat, 25 May 2019 10:23:43 -0600 (MDT)
Cc: healeys@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <004201d512c9$dc3b06c0$94b11440$@tpg.com.au> <CAB3i7L+ABZpnmSxd7c2Xo0-ypQ6Yj1vkABrkXT4mj=rxT3VoEg@mail.gmail.com> <00a101d512ec$5f725d50$1e5717f0$@tpg.com.au>
Thread-index: AQNHcxa8ziivn3rVhG3v6if7WQG1+QJXOKwZo4Q4VqACWijfBw== UKFd/v3CBmEYn8F/Dcc+9vKapDtJ0J75Q5GbPWOZLtgqGqiZ6PveXng61bez9DJ1Wx7LwG+kfbxr3wLPvMe+2AtGvgmYfuA371eiTGbzpgBOIllWaS9yNTy0 iHhScEzaAIchPP/+wo39MA==
Thread-topic: Ignition Circuit
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Suggest that you consider powering the fan via a relay (reduces current thr=
ough ign switch) and also an in line fuse for good practice when adding new=
 circuits.
Also as Perry says the ign warning light coming on is not a complete disast=
er. It just tells you you are at full capcity and you could probably drive =
for a few hours if your batt is OK. Sounds like you have an ammeter - just =
keep an eye on it when using the fan and note the discharge the current -  =
probably less than 5A - and note too the increased make up charging current=
 after you switch off the fan.rg
----- Original Message -----
From: Patrick & Caroline Quinn <p_cquinn@tpg.com.au>
To: 'Michael Salter' <michaelsalter@gmail.com>
Cc: healeys@autox.team.net
Sent: Sat, 25 May 2019 05:24:07 -0600 (MDT)
Subject: Re: [Healeys] Ignition Circuit

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-->Hello Michael And to obtain a wiring harness for a real Healey would mea=
n that it has to be specially made. Thanks Patrick Quinn From: Michael Salt=
er [mailto:michaelsalter@gmail.com]=20
Sent: Saturday, 25 May 2019 9:09 PM
To: Patrick and Caroline Quinn
Cc: healeys@autox.team.net
Subject: Re: [Healeys] Ignition Circuit Hi Patrick,  I would agree that usi=
ng the fused connection on the "ignition switched" side of the fuse block a=
s the source would be a good idea. The ignition switch is not fuse protecte=
d so by using that as a source you do run a risk of "letting the smoke out"=
 should a short to ground occur in your fan system. You may find that the e=
lectrical demands of your fan are more than the fuses can handle as the sys=
tem was not designed with heavy continuous loads in mind. To circumvent tha=
t issue you could use the unfused side of the "ignition switched" section o=
f the fuse block as the source and install an "in line" fuse to protect the=
 fan circuit. I cannot overemphasize the importance of protecting the fan c=
ircuit with a fuse, it very easy to damage a wiring harness and replacing o=
ne is a major undertaking.  M On Sat, May 25, 2019, 3:17 AM Patrick & Carol=
ine Quinn, <p_cquinn@tpg.com.au> wrote:Hello Seeking advice from those who =
understand automotive electrics. My real Healey has an electric fan in fron=
t of the radiator that was controlled by a thermo switch. Worked reasonably=
 well, but drew quite a bit of power but nothing concerning. When on, the a=
mp gauge needle would always hover in the negative. Personally I don=E2=80=
=99t like thermo switches, so the fan has now been wired direct and operate=
d by a discreet switch under the dash. Power is taken directly from the out=
going side of the ignition switch so that the fan only comes on when the ig=
nition is on along with the specific switch. Works well, but now when the f=
an goes on the ignition light is illuminated and will not go out. Does that=
 mean that the ignition circuit doesn=E2=80=99t like what I have done? I am=
 thinking of taking the power direct from the incoming side of the ignition=
 switch so that the fan is powered direct from the battery. Would that work=
? Any electrical whizzes out there? Thanks Patrick QuinnBlue Mountains, Aus=
tralia Virus-free. www.avast.com___________________________________________=
____

Archive: http://www.team.net/pipermail/healeyshttp://autox.team.net/archive

Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys

lter@gmail.com

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<html><head><style> body {height: 100%; color:#000000; font-size:12pt; font=
-family:arial,helvetica,sans-serif;}</style></head><body><div><div>Suggest =
that you consider powering the fan via a relay (reduces current through ign=
 switch) and also an in line fuse for good practice when adding new circuit=
s.<br></div><div>Also as Perry says the ign warning light coming on is not =
a complete disaster. It just tells you you are at full capcity and you coul=
d probably drive for a few hours if your batt is OK. Sounds like you have a=
n ammeter - just keep an eye on it when using the fan and note the discharg=
e the current -&nbsp; probably less than 5A - and note too the increased ma=
ke up charging current after you switch off the fan.</div><div>rg</div></di=
v><div><br></div><div>----- Original Message -----<br>From: Patrick &amp; C=
aroline Quinn &lt;p_cquinn@tpg.com.au&gt;<br>To: 'Michael Salter' &lt;micha=
elsalter@gmail.com&gt;<br>Cc: healeys@autox.team.net<br>Sent: Sat, 25 May 2=
019 05:24:07 -0600 (MDT)<br>Subject: Re: [Healeys] Ignition Circuit<br></di=
v><div><br></div><style><!--<br><div><br></div>@font-face<br>=09{font-famil=
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:"Calibri","sans-serif";<br>=09mso-fareast-language:EN-US;}<br>@page WordSe=
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t;}<br>div.WordSection1<br>=09{page:WordSection1;}<br>--></style><div class=
=3D"WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;"=
 data-mce-style=3D"font-size: 11.0pt;">Hello Michael</span></p><p class=3D"=
MsoNormal"><span style=3D"font-size: 11.0pt;" data-mce-style=3D"font-size: =
11.0pt;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"font-size: =
11.0pt;" data-mce-style=3D"font-size: 11.0pt;">And to obtain a wiring harne=
ss for a real Healey would mean that it has to be specially made.</span></p=
><p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;" data-mce-style=
=3D"font-size: 11.0pt;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=
=3D"font-size: 11.0pt;" data-mce-style=3D"font-size: 11.0pt;">Thanks</span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;" data-mce-styl=
e=3D"font-size: 11.0pt;">&nbsp;</span></p><p class=3D"MsoNormal"><span styl=
e=3D"font-size: 11.0pt;" data-mce-style=3D"font-size: 11.0pt;">Patrick Quin=
n</span></p><p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;" data-=
mce-style=3D"font-size: 11.0pt;">&nbsp;</span></p><p class=3D"MsoNormal"><b=
><span style=3D"font-size: 10.0pt; font-family: 'Tahoma','sans-serif';" dat=
a-mce-style=3D"font-size: 10.0pt; font-family: 'Tahoma','sans-serif';" lang=
=3D"EN-US">From:</span></b><span style=3D"font-size: 10.0pt; font-family: '=
Tahoma','sans-serif';" data-mce-style=3D"font-size: 10.0pt; font-family: 'T=
ahoma','sans-serif';" lang=3D"EN-US"> Michael Salter [mailto:michaelsalter@=
gmail.com] <br><b>Sent:</b> Saturday, 25 May 2019 9:09 PM<br><b>To:</b> Pat=
rick and Caroline Quinn<br><b>Cc:</b> healeys@autox.team.net<br><b>Subject:=
</b> Re: [Healeys] Ignition Circuit</span></p><p class=3D"MsoNormal">&nbsp;=
</p><div><p class=3D"MsoNormal">Hi Patrick,&nbsp; I would agree that using =
the fused connection on the "ignition switched" side of the fuse block as t=
he source would be a&nbsp;good idea. The ignition switch is not fuse protec=
ted so by using that as a source you do run a risk of "letting the smoke ou=
t" should a short to ground occur in your fan system.&nbsp;</p><div><p clas=
s=3D"MsoNormal">You may find that the electrical demands of your fan are mo=
re than the fuses can handle as the system was not designed with heavy cont=
inuous loads in mind.&nbsp;</p></div><div><p class=3D"MsoNormal">To circumv=
ent that issue you could use the unfused side of the "<span style=3D"font-f=
amily: 'Arial','sans-serif';" data-mce-style=3D"font-family: 'Arial','sans-=
serif';">ignition switched" section of the fuse block as the source and ins=
tall an "in line" fuse to protect the fan circuit.&nbsp;</span></p></div><d=
iv><p class=3D"MsoNormal"><span style=3D"font-family: 'Arial','sans-serif';=
" data-mce-style=3D"font-family: 'Arial','sans-serif';">I cannot overemphas=
ize the importance of protecting the fan circuit with a fuse, it very easy =
to damage a wiring harness and replacing one is a major undertaking.&nbsp;<=
/span></p></div><div><p class=3D"MsoNormal">&nbsp;</p></div><div><p class=
=3D"MsoNormal"><span style=3D"font-family: 'Arial','sans-serif';" data-mce-=
style=3D"font-family: 'Arial','sans-serif';">M</span></p></div></div><p cla=
ss=3D"MsoNormal">&nbsp;</p><div><div><p class=3D"MsoNormal">On Sat, May 25,=
 2019, 3:17 AM Patrick &amp; Caroline Quinn, &lt;<a href=3D"mailto:p_cquinn=
@tpg.com.au" target=3D"_blank" data-mce-href=3D"mailto:p_cquinn@tpg.com.au"=
>p_cquinn@tpg.com.au</a>&gt; wrote:</p></div><blockquote style=3D"border: n=
one; border-left: solid #CCCCCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin-l=
eft: 4.8pt; margin-right: 0cm;" data-mce-style=3D"border: none; border-left=
: solid #CCCCCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin-left: 4.8pt; marg=
in-right: 0cm;"><div><div><p class=3D"MsoNormal" style=3D"mso-margin-top-al=
t: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt=
: auto; mso-margin-bottom-alt: auto;">Hello</p><p class=3D"MsoNormal" style=
=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=
=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;">&nbsp;</p><p cl=
ass=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt:=
 auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: =
auto;">Seeking advice from those who understand automotive electrics.</p><p=
 class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-a=
lt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-al=
t: auto;">&nbsp;</p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: aut=
o; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto=
; mso-margin-bottom-alt: auto;">My real Healey has an electric fan in front=
 of the radiator that was controlled by a thermo switch. Worked reasonably =
well, but drew quite a bit of power but nothing concerning. When on, the am=
p gauge needle would always hover in the negative.</p><p class=3D"MsoNormal=
" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce=
-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;">&nbsp;</p=
><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-botto=
m-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;">Personally I don=E2=80=99t like thermo switches, so the fan ha=
s now been wired direct and operated by a discreet switch under the dash. P=
ower is taken directly from the outgoing side of the ignition switch so tha=
t the fan only comes on when the ignition is on along with the specific swi=
tch.</p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margi=
n-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin=
-bottom-alt: auto;">&nbsp;</p><p class=3D"MsoNormal" style=3D"mso-margin-to=
p-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top=
-alt: auto; mso-margin-bottom-alt: auto;">Works well, but now when the fan =
goes on the ignition light is illuminated and will not go out.</p><p class=
=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: au=
to;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: aut=
o;">&nbsp;</p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso=
-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-=
margin-bottom-alt: auto;">Does that mean that the ignition circuit doesn=E2=
=80=99t like what I have done? I am thinking of taking the power direct fro=
m the incoming side of the ignition switch so that the fan is powered direc=
t from the battery. Would that work?</p><p class=3D"MsoNormal" style=3D"mso=
-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-=
margin-top-alt: auto; mso-margin-bottom-alt: auto;">&nbsp;</p><p class=3D"M=
soNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" =
data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;">A=
ny electrical whizzes out there?</p><p class=3D"MsoNormal" style=3D"mso-mar=
gin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-marg=
in-top-alt: auto; mso-margin-bottom-alt: auto;">&nbsp;</p><p class=3D"MsoNo=
rmal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data=
-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;">Thank=
s</p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-b=
ottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bo=
ttom-alt: auto;">&nbsp;</p><p class=3D"MsoNormal" style=3D"mso-margin-top-a=
lt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-al=
t: auto; mso-margin-bottom-alt: auto;">Patrick Quinn</p><p class=3D"MsoNorm=
al" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-m=
ce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;">Blue Mo=
untains, Australia</p></div><div id=3D"m_8615921404074116746m_5222258684688=
57056DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><p class=3D"MsoNormal">&nbsp;</p=
><table class=3D"MsoNormalTable" style=3D"border: none; border-top: solid #=
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