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Re: [Healeys] Distributor to spark plug lead continuity

To: Bob Spidell <bspidell@comcast.net>, Linwood Rose <linwoodrose@mac.com>
Subject: Re: [Healeys] Distributor to spark plug lead continuity
From: jim via Healeys <healeys@autox.team.net>
Date: Thu, 21 May 2020 17:36:34 +0000 (UTC)
Cc: healeys@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <337efcea-dc9a-6207-8358-60d44158a7bf@comcast.net> <3C87934D-91C9-40B6-B7CF-7C27052B2870@mac.com> Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0
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 speel czech
jim

    On Thursday, May 21, 2020, 8:39:21 AM PDT, Linwood Rose via Healeys <he=
aleys@autox.team.net> wrote: =20
=20
 Don=E2=80=99t know how distributor cap turned into radiator cap?????Lin

Sent from my iPhone

On May 21, 2020, at 11:30 AM, Bob Spidell <bspidell@comcast.net> wrote:



=EF=BB=BF=20
 First, why on earth did you have a spark plug lead on a radiator cap??? (p=
resume you meant 'distributor' cap?)
=20
 It looks like you have your multimeter set to diode test (maybe that's how=
 continuity works on your MM?).* The reading is probably ohms, indicating a=
 very low resistance circuit, but to be sure turn the MM control knob one c=
lick clockwise, to the 200 ohm range ('200 omega').* It'll probably give th=
e same reading; i.e. .792 ohms, which is about what you'd expect from a sho=
rt stranded copper wire lead (IIRC, one ohm per foot of cable is considered=
 normal, even copper has some resistance).
=20
 Bob=20
=20
=20
 On 5/21/2020 7:55 AM, Linwood Rose via Healeys wrote:
 =20
=20
 Hi guys, Educate me. When doing some preventative maintenance, I pulled a =
spark plug lead out of the radiator cap (using a 123 distributor) the cable=
 pulled away from the terminal - not a particularly unusual outcome. Got a =
new 90 degree terminal and crimped it on to the cable (Pertronix cable) and=
 before I put the boot on the end of the cable I thought I would check the =
continuity. It barely dropped below 1.=20
  So then I checked a brand new, never used, cable made-up by AH Spares. As=
 shown in the image below when the sensors are attached to each end of the =
cable I get a reading of .792 which is not sufficient to even sound the bee=
per on the multimeter device. I suppose there are degrees of continuity (no=
t just on/off) but I guess I expected the alarm to sound and the reading to=
 drop to near zero.=20
  Could someone interpret these findings for me?=20
  Thanks, as always.=20
  Lin
=20
  <IMG_0608.jpeg> =20
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=20
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 =20
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<html><head></head><body><div class=3D"ydp2e0b4251yahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;"><div></div>
        <div dir=3D"ltr" data-setdir=3D"false">speel czech</div><div dir=3D=
"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false=
">jim<br></div><div><br></div>
       =20
        </div><div id=3D"ydp44c5e8d9yahoo_quoted_0096871469" class=3D"ydp44=
c5e8d9yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                    On Thursday, May 21, 2020, 8:39:21 AM PDT, Linwood Rose=
 via Healeys &lt;healeys@autox.team.net&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"ydp44c5e8d9yiv6939238946"><div>Don=E2=80=99=
t know how distributor cap turned into radiator cap?????<div>Lin<br clear=
=3D"none"><br clear=3D"none"><div dir=3D"ltr">Sent from my iPhone</div><div=
 dir=3D"ltr"><br clear=3D"none"><blockquote type=3D"cite">On May 21, 2020, =
at 11:30 AM, Bob Spidell &lt;bspidell@comcast.net&gt; wrote:<br clear=3D"no=
ne"><br clear=3D"none"></blockquote></div><blockquote type=3D"cite"><div di=
r=3D"ltr">=EF=BB=BF
 =20
    </div></blockquote></div></div><div>
 =20
 =20
    First, why on earth did you have a spark plug lead on a radiator
    cap??? (presume you meant 'distributor' cap?)<br clear=3D"none">
    <br clear=3D"none">
    It looks like you have your multimeter set to diode test (maybe
    that's how continuity works on your MM?).* The reading is probably
    ohms, indicating a very low resistance circuit, but to be sure turn
    the MM control knob one click clockwise, to the 200 ohm range ('200
    omega').* It'll probably give the same reading; i.e. .792 ohms,
    which is about what you'd expect from a short stranded copper wire
    lead (IIRC, one ohm per foot of cable is considered normal, even
    copper has some resistance).<br clear=3D"none">
    <br clear=3D"none">
    Bob <br clear=3D"none">
    <br clear=3D"none">
    <br clear=3D"none">
    <div class=3D"ydp44c5e8d9yiv6939238946moz-cite-prefix">On 5/21/2020 7:5=
5 AM, Linwood Rose via
      Healeys wrote:<br clear=3D"none">
    </div>
    <blockquote type=3D"cite">
      </blockquote></div><div>
      Hi guys,
      <div class=3D"ydp44c5e8d9yiv6939238946">Educate me. When doing some p=
reventative
        maintenance, I pulled a spark plug lead out of the radiator cap
        (using a 123 distributor) the cable pulled away from the
        terminal - not a particularly unusual outcome. Got a new 90
        degree terminal and crimped it on to the cable (Pertronix cable)
        and before I put the boot on the end of the cable I thought I
        would check the continuity. It barely dropped below 1.</div>
      <div class=3D"ydp44c5e8d9yiv6939238946"><br class=3D"ydp44c5e8d9yiv69=
39238946" clear=3D"none">
      </div>
      <div class=3D"ydp44c5e8d9yiv6939238946">So then I checked a brand new=
, never used, cable
        made-up by AH Spares. As shown in the image below when the
        sensors are attached to each end of the cable I get a reading of
        .792 which is not sufficient to even sound the beeper on the
        multimeter device. I suppose there are degrees of continuity
        (not just on/off) but I guess I expected the alarm to sound and
        the reading to drop to near zero.</div>
      <div class=3D"ydp44c5e8d9yiv6939238946"><br class=3D"ydp44c5e8d9yiv69=
39238946" clear=3D"none">
      </div>
      <div class=3D"ydp44c5e8d9yiv6939238946">Could someone interpret these=
 findings for me?</div>
      <div class=3D"ydp44c5e8d9yiv6939238946"><br class=3D"ydp44c5e8d9yiv69=
39238946" clear=3D"none">
      </div>
      <div class=3D"ydp44c5e8d9yiv6939238946">Thanks, as always.</div>
      <div class=3D"ydp44c5e8d9yiv6939238946"><br class=3D"ydp44c5e8d9yiv69=
39238946" clear=3D"none">
      </div>
      <div class=3D"ydp44c5e8d9yiv6939238946">Lin<br class=3D"ydp44c5e8d9yi=
v6939238946" clear=3D"none">
        <div class=3D"ydp44c5e8d9yiv6939238946"><br class=3D"ydp44c5e8d9yiv=
6939238946" clear=3D"none">
        </div>
        <div class=3D"ydp44c5e8d9yiv6939238946"><div>&lt;IMG_0608.jpeg&gt;<=
/div></div>
      </div><div class=3D"ydp44c5e8d9yiv6939238946yqt4086779532" id=3D"ydp4=
4c5e8d9yiv6939238946yqtfd08495">
      <br clear=3D"none">
      <fieldset class=3D"ydp44c5e8d9yiv6939238946mimeAttachmentHeader"></fi=
eldset>
      <pre class=3D"ydp44c5e8d9yiv6939238946moz-quote-pre">________________=
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</pre>
   =20
    <br clear=3D"none">
 =20

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