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<p>Nothing to worry about. The fan is drawing a lot of amps which
will result in a negative charge hence the ign. light is coming
on, probably only when idling. Before you most likely had the fan
wired directly from the main circuit in series with the Amp. meter
and not through the ignition circuit so the light might not show.
You could operating the fan using a relay switched on by the under
dash switch but getting the main current from the battery. It will
not solve the negative charge but it may avoid the light coming
on.</p>
<p>Perhaps the fan is a bit to powerful and drawing more Amps than
necessary. However the fan is only on for a very short while
unless in prolonged very heavy traffic and on long and slow steep
inclines<br>
</p>
<p>The best way is to revert to the old situation with the
thermo-switch (wired through the ignition circuit and use the
manual switch as an override switch so when you switch of the
ignition the fan will not work. These should switch a relay with
the main current coming directly from the main circuit with the
Ampmeter<br>
</p>
<p>Use a thermo-switch tot cuts in at say 90-95°C and cuts out at
about 5-10°C over the opening temperature of the thermostat.</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 25-5-2019 om 09:17 schreef Patrick
& Caroline Quinn:<br>
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<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Hello<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Seeking advice from those who
understand automotive electrics.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">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 amp gauge
needle would always hover in the negative. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Personally I don’t like
thermo switches, so the fan has now been wired direct and
operated by a discreet switch under the dash. Power is taken
directly from the outgoing side of the ignition switch so
that the fan only comes on when the ignition is on along
with the specific switch.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Works well, but now when the
fan goes on the ignition light is illuminated and will not
go out.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Does that mean that the
ignition circuit doesn’t 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?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Any electrical whizzes out
there?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Patrick Quinn<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif"">Blue Mountains, Australia <o:p></o:p></span></p>
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