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    <p>O/T (slightly).  I now understand how the 'ignition' light works;
      i.e. a balance between the battery output and the generator's. 
      I've also read the using an LED is somewhere between ineffective
      and dangerous, but I used an LED for the ignition light and it
      functioned just like a bulb for years.  I did, however, heed the
      warnings and put a bulb back in that circuit.</p>
    <p>Bob<br>
    </p>
    <div class="moz-cite-prefix">On 5/25/2019 9:23 AM, Roger Grace
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:413736495.314116452.1558801423696.JavaMail.zimbra@mailid.telus.net">
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        <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 circuits.<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 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.</div>
        <div>rg</div>
      </div>
      <div><br>
      </div>
      <div>----- Original Message -----<br>
        From: Patrick & Caroline Quinn <a class="moz-txt-link-rfc2396E" href="mailto:p_cquinn@tpg.com.au"><p_cquinn@tpg.com.au></a><br>
        To: 'Michael Salter' <a class="moz-txt-link-rfc2396E" href="mailto:michaelsalter@gmail.com"><michaelsalter@gmail.com></a><br>
        Cc: <a class="moz-txt-link-abbreviated" href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br>
        Sent: Sat, 25 May 2019 05:24:07 -0600 (MDT)<br>
        Subject: Re: [Healeys] Ignition Circuit<br>
      </div>
      <div><br>
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        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;">Hello Michael</span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;"> </span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;">And to obtain a wiring
            harness for a real Healey would mean that it has to be
            specially made.</span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;"> </span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;">Thanks</span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;"> </span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;">Patrick Quinn</span></p>
        <p class="MsoNormal"><span style="font-size: 11.0pt;"
            data-mce-style="font-size: 11.0pt;"> </span></p>
        <p class="MsoNormal"><b><span style="font-size: 10.0pt;
              font-family: 'Tahoma','sans-serif';"
              data-mce-style="font-size: 10.0pt; font-family:
              'Tahoma','sans-serif';" lang="EN-US">From:</span></b><span
            style="font-size: 10.0pt; font-family:
            'Tahoma','sans-serif';" data-mce-style="font-size: 10.0pt;
            font-family: 'Tahoma','sans-serif';" lang="EN-US"> Michael
            Salter [<a class="moz-txt-link-freetext" href="mailto:michaelsalter@gmail.com">mailto:michaelsalter@gmail.com</a>] <br>
            <b>Sent:</b> Saturday, 25 May 2019 9:09 PM<br>
            <b>To:</b> Patrick and Caroline Quinn<br>
            <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br>
            <b>Subject:</b> Re: [Healeys] Ignition Circuit</span></p>
        <p class="MsoNormal"> </p>
        <div>
          <p class="MsoNormal">Hi Patrick,  I would agree that using the
            fused connection on the "ignition switched" side of the fuse
            block as the source would be a good idea. The ignition
            switch is not fuse protected 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. </p>
          <div>
            <p class="MsoNormal">You may find that the electrical
              demands of your fan are more than the fuses can handle as
              the system was not designed with heavy continuous loads in
              mind. </p>
          </div>
          <div>
            <p class="MsoNormal">To circumvent that issue you could use
              the unfused side of the "<span style="font-family:
                'Arial','sans-serif';" data-mce-style="font-family:
                'Arial','sans-serif';">ignition switched" section of the
                fuse block as the source and install an "in line" fuse
                to protect the fan circuit. </span></p>
          </div>
          <div>
            <p class="MsoNormal"><span style="font-family:
                'Arial','sans-serif';" data-mce-style="font-family:
                'Arial','sans-serif';">I cannot overemphasize 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. </span></p>
          </div>
          <div>
            <p class="MsoNormal"> </p>
          </div>
          <div>
            <p class="MsoNormal"><span style="font-family:
                'Arial','sans-serif';" data-mce-style="font-family:
                'Arial','sans-serif';">M</span></p>
          </div>
        </div>
        <p class="MsoNormal"> </p>
        <div>
          <div>
            <p class="MsoNormal">On Sat, May 25, 2019, 3:17 AM Patrick
              & Caroline Quinn, <<a
                href="mailto:p_cquinn@tpg.com.au" target="_blank"
                data-mce-href="mailto:p_cquinn@tpg.com.au"
                moz-do-not-send="true">p_cquinn@tpg.com.au</a>>
              wrote:</p>
          </div>
          <blockquote style="border: none; border-left: solid #CCCCCC
            1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin-left: 4.8pt;
            margin-right: 0cm;" data-mce-style="border: none;
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            <div>
              <div>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">Hello</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">Seeking advice from
                  those who understand automotive electrics.</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="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 amp gauge needle would always hover in
                  the negative.</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">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.</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="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="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">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?</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">Any electrical whizzes
                  out there?</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">Thanks</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"> </p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">Patrick Quinn</p>
                <p class="MsoNormal" style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;"
                  data-mce-style="mso-margin-top-alt: auto;
                  mso-margin-bottom-alt: auto;">Blue Mountains,
                  Australia</p>
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