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Re: [Healeys] Ballast resistor wiring question

To: Bob Spidell <bspidell@comcast.net>, Healeys <healeys@autox.team.net>
Subject: Re: [Healeys] Ballast resistor wiring question
From: Michael MacLean <rrengineer.mike@att.net>
Date: Thu, 26 Dec 2019 17:44:43 +0000 (UTC)
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <CAPTa0B53TDm6xcgpDQ51vAGZEeKtehfwYhyh0tbKZ=ZcXT6LgA@mail.gmail.com> <f931f39c-f907-20f4-e735-1a7d1b18e2d5@earthlink.net> <CAPTa0B72rCiFwvH-YCWzmKZEpRdmf1C7MXfc12C6s6qCbYG1Fw@mail.gmail.com> <CAB3i7LLdKC_hVpfjUwgGJXom_9H6q6GXNki6Yg+GW=AsYMWKoA@mail.gmail.com> <e9a2705a-6f2f-2aa6-2861-b22a8bb747fd@comcast.net> x64; rv:71.0) Gecko/20100101 Firefox/71.0
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 Flashers

|=20
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| $17.95 |  |

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Flashers

Electronic Flashers for use with LED Lamps
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As long as originality is not of the utmost importance.

Mike MacLean


    On Thursday, December 26, 2019, 9:13:04 AM PST, Bob Spidell <bspidell@c=
omcast.net> wrote: =20
=20
  The Moss catalog states 'You will need one [resistor] for each side of th=
e car,' so I don't think it matters where you put them, as long as they are=
 in parallel in the circuit.=C2=A0 50W resistors are pretty large, so I wou=
ldn't want them in the engine bay; in the boot near the lights would be my =
preference.
=20
 Resistor ratings are typically given in the load the resistor can withstan=
d without letting the smoke out, not how much power it will pull--since vol=
tage of the circuit the resistor is to be installed in often isn't known--b=
ut Moss isn't specific about this.=C2=A0 The turn signal circuits are separ=
ate--although Moss implies they can somehow bleed through--so the power dra=
w isn't additive*.=C2=A0 The Moss catalog mentions the 'application data in=
 the schematic section of this catalog' but I'll be damned if I can find sa=
id section and the search function on the website yields no useful results;=
 anybody know the page# in the current catalog?
=20
 The catalog is confusing as it states you'll need an electronic flasher if=
 you install LEDs, then gives the option to install load resistors; presuma=
bly, if you don't want to replace your old-school flasher.
=20
 Bob
=20
 * theoretically, since the flasher operates both sides of the signals you =
could put a single resistor on the 'signal' terminal of the flasher (IIRC, =
the flashers have GND, power and 'signal' terminals).
=20
=20
 On 12/26/2019 7:05 AM, Michael Salter wrote:
 =20
=20
 After due consideration I've come to realize that there is a problem with =
the planed resistor installation.=C2=A0 The original Lucas "thermal " type =
flasher unit is rated at 42 watts.=C2=A0 The resistors that are shown on th=
e Moss web site are 50 watt.=C2=A0 If you were to install such a resistor, =
to simulate the load, on each turn signal bulb the load through the flasher=
 unit, when the signals were selected, would be 100 watts PLUS whatever the=
 LED lamps drew. This would result in 8.3 amps flowing through the flasher =
unit=C2=A0 ... probably enough to burn it out!! I would think that a far be=
tter solution would be to install two 50 watt resistors. On the turn signal=
 relay (that mysterious metal box mounted on the left front inner fender). =
One 50 watt resistor would be installed between terminal 2 and ground and t=
he other between terminal 6 and ground. Those original flasher units are be=
coming VERY hard to find so it would be a pity to cook any more of them.=20
  M=20
=20
  On Tue, Dec 24, 2019, 10:30 AM Michael Oritt, <michael.oritt@gmail.com> w=
rote:
 =20
  Thanks all.=C2=A0 What Kees says flies=C2=A0in the face of both Moss's (s=
lightly inarticulate) instructions as well=C2=A0as the consensus of the gro=
up.=C2=A0 I=C2=A0will=C2=A0install ONE resistor in the flasher lead of each=
 lamp, two--not four--resistors total.=20
  Best--Michael Oritt =20
  On Tue, Dec 24, 2019 at 10:22 AM Bob Haskell <rchaskell@earthlink.net> wr=
ote:
 =20
Per the Moss video, you're creating a new ground path to prevent all=20
 lights blinking when you turn on the left or right turn signal.=C2=A0 So=
=20
 connect the ballast resistors to the turn signal circuit.
=20
 Cheers,
=20
 Bob Haskell
 Austin Healey 3000 BN7/BT7 registrar
=20
 On 12/24/19 9:22 AM, Michael Oritt wrote:
 > I purchased two of the Moss 170-941 red LED bulbs to use as=20
 > tail-lights/brake-lights to replace the standard 1157 dual filament=20
 > bulbs on my 100 (I have the reflector pods electrified and wired for=20
 > turn signals).=C2=A0 In addition to the bulbs I also purchased, at Moss'=
s=20
 > suggestion, two 170-965 Load Resistors.
 >=20
 > The instructions for installation of the resistors simply talk about the=
=20
 > resistor's being installed between the power and ground leads to each=20
 > fixture but it does not specify which power lead.=C2=A0 My question is: =
=C2=A0do I=20
 > connect the ground lead to the tail light power lead or the turn signal=
=20
 > power lead or does it matter?=C2=A0 I cannot envision connecting it to b=
oth=20
 > as that would defeat their separate function.
 >=20
 > TIA....Michael Oritt
 >=20
 =20
   =20
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ine-height: 19px; margin: 0px 0px 6px; font-family: Helvetica Neue, Segoe U=
I, Helvetica, Arial, sans-serif; color: rgb(38, 40, 42);">Flashers</h2><p c=
lass=3D"ydp8baa8783card-description" style=3D"font-size: 12px; line-height:=
 16px; margin: 0px; color: rgb(151, 155, 167);">Electronic Flashers for use=
 with LED Lamps</p></td></tr></tbody></table></td></tr></tbody></table></td=
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e:16px;"><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" =
data-setdir=3D"false">As long as originality is not of the utmost importanc=
e.<br></div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"lt=
r" data-setdir=3D"false">Mike MacLean<br></div><div><br></div><div><br></di=
v>
       =20
        </div><div id=3D"yahoo_quoted_8078530505" class=3D"yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                    On Thursday, December 26, 2019, 9:13:04 AM PST, Bob Spi=
dell &lt;bspidell@comcast.net&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"yiv5897089254"><div>
    The Moss catalog states 'You will need one [resistor] for each side
    of the car,' so I don't think it matters where you put them, as long
    as they are in parallel in the circuit.&nbsp; 50W resistors are pretty
    large, so I wouldn't want them in the engine bay; in the boot near
    the lights would be my preference.<br clear=3D"none">
    <br clear=3D"none">
    Resistor ratings are typically given in the load the resistor can
    withstand without letting the smoke out, not how much power it will
    pull--since voltage of the circuit the resistor is to be installed
    in often isn't known--but Moss isn't specific about this.&nbsp; The tur=
n
    signal circuits are separate--although Moss implies they can somehow
    bleed through--so the power draw isn't additive*.&nbsp; The Moss catalo=
g
    mentions the 'application data in the schematic section of this
    catalog' but I'll be damned if I can find said section and the
    search function on the website yields no useful results; anybody
    know the page# in the current catalog?<br clear=3D"none">
    <br clear=3D"none">
    The catalog is confusing as it states you'll need an electronic
    flasher if you install LEDs, then gives the option to install load
    resistors; presumably, if you don't want to replace your old-school
    flasher.<br clear=3D"none">
    <br clear=3D"none">
    Bob<br clear=3D"none">
    <br clear=3D"none">
    * theoretically, since the flasher operates both sides of the
    signals you could put a single resistor on the 'signal' terminal of
    the flasher (IIRC, the flashers have GND, power and 'signal'
    terminals).<br clear=3D"none">
    <br clear=3D"none">
    <br clear=3D"none">
    <div class=3D"yiv5897089254yqt0388539740" id=3D"yiv5897089254yqtfd07442=
"><div class=3D"yiv5897089254moz-cite-prefix">On 12/26/2019 7:05 AM, Michae=
l Salter
      wrote:<br clear=3D"none">
    </div>
    <blockquote type=3D"cite">
      </blockquote></div></div><div class=3D"yiv5897089254yqt0388539740" id=
=3D"yiv5897089254yqtfd79798"><div><div>
        <div>After due consideration I've come to realize that there is
          a problem with the planed resistor installation.&nbsp;
          <div>The original Lucas "thermal " type flasher
            unit is rated at 42 watts.&nbsp;</div>
          <div>The resistors that are shown on the Moss web
            site are 50 watt.&nbsp;</div>
          <div>If you were to install such a resistor, to
            simulate the load, on each turn signal bulb the load through
            the flasher unit, when the signals were selected, would be
            100 watts PLUS whatever the LED lamps drew. This would
            result in 8.3 amps flowing through the flasher unit&nbsp; ...
            probably enough to burn it out!!</div>
          <div>I would think that a far better solution would
            be to install two 50 watt resistors.</div>
          <div>On the turn signal relay (that mysterious
            metal box mounted on the left front inner fender). One 50
            watt resistor would be installed between terminal 2 and
            ground and the other between terminal 6 and ground.</div>
          <div>Those original flasher units are becoming VERY
            hard to find so it would be a pity to cook any more of them.</d=
iv>
          <div><br clear=3D"none">
          </div>
          <div>M</div>
          <br clear=3D"none">
          <br clear=3D"none">
          <div class=3D"yiv5897089254gmail_quote">
            <div class=3D"yiv5897089254gmail_attr" dir=3D"ltr">On Tue, Dec =
24, 2019,
              10:30 AM Michael Oritt, &lt;<a rel=3D"nofollow" shape=3D"rect=
" ymailto=3D"mailto:michael.oritt@gmail.com"; target=3D"_blank" href=3D"mail=
to:michael.oritt@gmail.com">michael.oritt@gmail.com</a>&gt;
              wrote:<br clear=3D"none">
            </div>
            <blockquote class=3D"yiv5897089254gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
              <div dir=3D"ltr">
                <div class=3D"yiv5897089254gmail_default" style=3D"color:#3=
333ff;">Thanks
                  all.&nbsp; What Kees says flies&nbsp;in the face of both =
Moss's
                  (slightly inarticulate) instructions as well&nbsp;as the
                  consensus of the group.&nbsp; I&nbsp;will&nbsp;install ON=
E resistor
                  in the flasher lead of each lamp, two--not
                  four--resistors total.</div>
                <div class=3D"yiv5897089254gmail_default" style=3D"color:#3=
333ff;"><br clear=3D"none">
                </div>
                <div class=3D"yiv5897089254gmail_default" style=3D"color:#3=
333ff;">Best--Michael
                  Oritt</div>
              </div>
              <br clear=3D"none">
              <div class=3D"yiv5897089254gmail_quote">
                <div class=3D"yiv5897089254gmail_attr" dir=3D"ltr">On Tue, =
Dec 24, 2019
                  at 10:22 AM Bob Haskell &lt;<a rel=3D"nofollow" shape=3D"=
rect" ymailto=3D"mailto:rchaskell@earthlink.net"; target=3D"_blank" href=3D"=
mailto:rchaskell@earthlink.net";>rchaskell@earthlink.net</a>&gt;
                  wrote:<br clear=3D"none">
                </div>
                <blockquote class=3D"yiv5897089254gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex;">Per the Moss video,
                  you're creating a new ground path to prevent all <br clea=
r=3D"none">
                  lights blinking when you turn on the left or right
                  turn signal.&nbsp; So <br clear=3D"none">
                  connect the ballast resistors to the turn signal
                  circuit.<br clear=3D"none">
                  <br clear=3D"none">
                  Cheers,<br clear=3D"none">
                  <br clear=3D"none">
                  Bob Haskell<br clear=3D"none">
                  Austin Healey 3000 BN7/BT7 registrar<br clear=3D"none">
                  <br clear=3D"none">
                  On 12/24/19 9:22 AM, Michael Oritt wrote:<br clear=3D"non=
e">
                  &gt; I purchased two of the Moss 170-941 red LED bulbs
                  to use as <br clear=3D"none">
                  &gt; tail-lights/brake-lights to replace the standard
                  1157 dual filament <br clear=3D"none">
                  &gt; bulbs on my 100 (I have the reflector pods
                  electrified and wired for <br clear=3D"none">
                  &gt; turn signals).&nbsp; In addition to the bulbs I also
                  purchased, at Moss's <br clear=3D"none">
                  &gt; suggestion, two 170-965 Load Resistors.<br clear=3D"=
none">
                  &gt; <br clear=3D"none">
                  &gt; The instructions for installation of the
                  resistors simply talk about the <br clear=3D"none">
                  &gt; resistor's being installed between the power and
                  ground leads to each <br clear=3D"none">
                  &gt; fixture but it does not specify which power
                  lead.&nbsp; My question is: &nbsp;do I <br clear=3D"none"=
>
                  &gt; connect the ground lead to the tail light power
                  lead or the turn signal <br clear=3D"none">
                  &gt; power lead or does it matter?&nbsp; I cannot envisio=
n
                  connecting it to both <br clear=3D"none">
                  &gt; as that would defeat their separate function.<br cle=
ar=3D"none">
                  &gt; <br clear=3D"none">
                  &gt; TIA....Michael Oritt<br clear=3D"none">
                  &gt; </blockquote>
              </div>
            </blockquote>
          </div>
        </div>
      </div>
   =20
    <br clear=3D"none">
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