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<p>Which tach? Where did it come from?<br>
</p>
<p>For an MGB tach 'yes' if it has RVI on the dial. No if it has
RVC, for that you need a wire back from the points side of the
coil to the tach bullet connection.</p>
<p>Plus 12v and earth connections to the tach to power the
electronics, and that raises further questions. Have you converted
the car to positive earth? If not unless the tach is already
negative earth (the _original_ polarity is also on the face of MGB
tachs for example) you will need to reverse the power wires inside
the tach case and also the signal wires, which can be inside the
tach or outside depending on which tach you have.</p>
<p>PaulH.<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 30/07/2023 01:50, dave northrup
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f51ee42d371f46c2aa5df72be99fa0f4@ranteer.com">
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<p class="MsoNormal">I am trying to figure out how to connect
the tach on this car. it came to me in kit form<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img style="width:5.9916in;height:2.5583in"
id="Picture_x0020_1"
src="cid:part1.VpyrtiXX.0TV9Bi0m@gmail.com" class=""
width="575" height="246"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This diagram seems to show that in essence
the connection from power to the ignition coil goes through
the tach. That green wire goes off to the gage voltage
stabilizer – is that even needed?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So it seems to me that on my car, which has
an original early MGA wiring harness, all I really need to do
is run the white wire through the tach then to the ignition
coil, instead of going straight to the ignition coil. Am I on
the right tach here (haha)?<o:p></o:p></p>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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