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<p>Looks like they're both wired the same, and for neg. ground. Try
hooking them up to a 12V power source, and see which way makes
them fire (pump). If they don't run connected one way, try the
other. If it doesn't run right off the back disconnect lest you
overheat the solenoid body.</p>
<p>Are both diodes labeled the same?<br>
</p>
<p>Bob<br>
</p>
<br>
<div class="moz-cite-prefix">On 6/22/2018 3:18 PM,
<a class="moz-txt-link-abbreviated" href="mailto:hspethmann@t-online.de">hspethmann@t-online.de</a> wrote:<br>
</div>
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cite="mid:1529705897911.401922.b8f224fe3db279f943b926527275b72987cb6db9@spica.telekom.de">
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<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">My Healey:</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">BJ8 MKIII 1964</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;"># L27347</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">pos. earth</span></p>
<p style="margin: 0px;"> </p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">Fuel pump for the last 20 years:</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">SU AZX1307</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">now with a slow, but steady clicking
every 15 to 20 sec , when ignition is on.</span></p>
<p style="margin: 0px;"> </p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">I thought, the easiest solution is to
change the pump with a spare pump I have in my trunk for about
the same time as the first one. Both pumps look the same on
the outside. Both pumps are wrapped in black tape. But the
label on the box of the spare pump says: AZX1307 neg. earth.
</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">In the archives I found a very
instructive contribution by Steve Russel from Aug 2009. And it
ended with the words: "A picture would be worth a lot of words
right now."<br>
</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;"> So I removed the cap on both pumps to
see if there is any difference in the wiring and took a
picture, attached to this mail.. Both pumps look the same
inside. You see the old pump on the left, the new one on the
right. Under the cap you see a piece that looks like a
capacitor, labeled as BZX1013. But following the explanation
with terminal 1, 2 and 3 clockwise beginning with the power
input stud and ending with the internal ground terminal I
suppose the "capacitor" is a diode. But when there is no
difference in wiring between the old and the new pump, why
could it be, that the old one looking like a neg. earth ran 20
years in a car with pos. earth?<br>
</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">I'm confused and hoping for your
wisdom to shed some light on the problem.</span></p>
<p style="margin: 0px;"> </p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">Best</span></p>
<p style="margin: 0px;"><span style="font-family:
arial,helvetica,sans-serif; font-size: 10pt; color: #000000;
text-decoration: none;">Achim</span></p>
<p style="margin: 0px;"> </p>
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