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No, the Smiths type does not require the case be grounded... except for the
night light.
The two terminals are
1. about 10V (pulsed, 10V average from the regulator)
2. to the sensor which completes the circuit by going to ground.
And it doesn't matter which terminal is which.. Inside is a heating wire,
non-polaized.
Gary W.
On Fri, Aug 22, 2025 at 2:40=E2=80=AFPM Donald Antilla via Tigers <
tigers@autox.team.net> wrote:
> Graham: Please pardon my ignorance, but will you let me know if you have =
a
> classic Smiths gauge setup, or a Ford type?
>
> My comment prior about grounding the case assumes you have a Smith=E2=80=
=99s type
> system. In that case, you do need to ground your indicator case or- as
> happened to me- you get flakey readings.
>
> Don
>
>
>
> *From: *Tigers <tigers-bounces@autox.team.net> on behalf of Stu <
> sabre2tgr@gmail.com>
> *Date: *Thursday, August 21, 2025 at 7:37=E2=80=AFPM
> *To: *gharlowe@comcast.net <gharlowe@comcast.net>
> *Cc: *tigers@autox.team.net <tigers@autox.team.net>
> *Subject: *Re: [Tigers] Temp Gauge Reading High
>
> A high reading indicates there is a higher current flowing through
> the gauge, so a poor connection is unlikely. Is your tank near empty or
> full? A bad regulator might make less of a difference if the gauge is ne=
ar
> empty.
>
>
>
> The voltage regulator gets its ground through it's mounting screw. It
> would not be a first if there's a bit of corrosion under there. In a qui=
et
> place, turn on the key, don't start it, and you should be able to hear th=
e
> stock voltage regulator ticking away..
>
>
>
> For some more hints, here's a link to my old article on gauge
> troubleshooting.
>
>
>
> TigersUnited.com
> <http://www.tigersunited.com/techtips/BrennanGauge/rt-BrennanGauge1.asp>
>
>
>
> Both gauges have the same innards, so you can swap leads and see what
> happens with the pointer angles.
>
>
>
> Stu
>
>
>
> On Thu, Aug 21, 2025 at 5:57=E2=80=AFPM gharlowe--- via Tigers <
> tigers@autox.team.net> wrote:
>
>
>
> Hey all =E2=80=93
>
>
>
> It=E2=80=99s been quiet here so hoping to T-up an easy discussion.
>
>
>
> My temp gauge is reading about 25 degrees high. I noticed it after a
> shop installed a new clutch, which required the engine to be removed,
> coolant drained, etc., but nothing that should have affected how the gaug=
e
> reads. Running on a cool day, temps were reading around 215-220 degrees.
> To ensure I wasn=E2=80=99t actually in danger of overheating, I checked v=
arious
> water-cooled locations with an infrared thermometer. Highest reading wa=
s
> right at the water neck/thermostat housing (191 deg F). The fuel gauge =
is
> reading accurately. I understand the under-dash instrument stabilizer ca=
n
> affect both instruments, but in this case, only one gauge is off. I plan
> to check the ground to the temp gauge and clean contact points at the
> engine sending unit and at the gauge. Any other suggestions?
>
>
>
> Thanks and I hope all is well out there!
>
>
>
> Graham Harlowe
>
> B382001466
>
> _______________________________________________
>
> tigers@autox.team.net
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/tigers
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>
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>
> _______________________________________________
>
> tigers@autox.team.net
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/tigers
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>
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<div dir=3D"ltr"><div>No, the Smiths type does not require the case be grou=
nded... except for the night light.</div><div><br></div><div>The two termin=
als are</div><div>1.=C2=A0 about 10V (pulsed, 10V average from the regulato=
r)</div><div>2. to the sensor which completes the circuit by going to groun=
d.</div><div>And it=C2=A0doesn't matter which terminal is which..=C2=A0=
Inside is a heating wire, non-polaized.</div><div>Gary W.</div><div><br></=
div></div><br><div class=3D"gmail_quote gmail_quote_container"><div dir=3D"=
ltr" class=3D"gmail_attr">On Fri, Aug 22, 2025 at 2:40=E2=80=AFPM Donald An=
tilla via Tigers <<a href=3D"mailto:tigers@autox.team.net";>tigers@autox.=
team.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-le=
ft:1ex"><div class=3D"msg4089556418688194260">
<div lang=3D"EN-US" style=3D"overflow-wrap: break-word;">
<div class=3D"m_4089556418688194260WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:16pt;font-family:"Aria=
l",sans-serif">Graham: Please pardon my ignorance, but will you let me=
know if you have a classic Smiths gauge setup, or a Ford type?<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:16pt;font-family:"Aria=
l",sans-serif">My comment prior about grounding the case assumes you h=
ave a Smith=E2=80=99s type system. In that case, you do need to ground your=
indicator case or- as happened to me- you get flakey
readings.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:16pt;font-family:"Aria=
l",sans-serif">Don
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:16pt;font-family:"Aria=
l",sans-serif"><u></u>=C2=A0<u></u></span></p>
<div id=3D"m_4089556418688194260mail-editor-reference-message-container">
<div>
<div style=3D"border-width:1pt medium medium;border-style:solid none none;b=
order-color:rgb(181,196,223) currentcolor currentcolor;padding:3pt 0in 0in"=
>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:12pt;font-family:"Aptos",sans-serif;color:black">From:
</span></b><span style=3D"font-size:12pt;font-family:"Aptos",sans=
-serif;color:black">Tigers <<a href=3D"mailto:tigers-bounces@autox.team.=
net" target=3D"_blank">tigers-bounces@autox.team.net</a>> on behalf of S=
tu <<a href=3D"mailto:sabre2tgr@gmail.com"; target=3D"_blank">sabre2tgr@g=
mail.com</a>><br>
<b>Date: </b>Thursday, August 21, 2025 at 7:37</span><span style=3D"font-si=
ze:12pt;font-family:"Arial",sans-serif;color:black">=E2=80=AF</sp=
an><span style=3D"font-size:12pt;font-family:"Aptos",sans-serif;c=
olor:black">PM<br>
<b>To: </b><a href=3D"mailto:gharlowe@comcast.net"; target=3D"_blank">gharlo=
we@comcast.net</a> <<a href=3D"mailto:gharlowe@comcast.net"; target=3D"_b=
lank">gharlowe@comcast.net</a>><br>
<b>Cc: </b><a href=3D"mailto:tigers@autox.team.net"; target=3D"_blank">tiger=
s@autox.team.net</a> <<a href=3D"mailto:tigers@autox.team.net"; target=3D=
"_blank">tigers@autox.team.net</a>><br>
<b>Subject: </b>Re: [Tigers] Temp Gauge Reading High<u></u><u></u></span></=
p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">A high reading indica=
tes there is a higher current flowing through the=C2=A0gauge,=C2=A0 so a po=
or connection is unlikely.=C2=A0 Is your tank near empty or full?=C2=A0 A b=
ad regulator might make less of a difference if the gauge
is near empty.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">The voltage regulator=
gets its ground through it's mounting screw.=C2=A0 It would not be a f=
irst if there's a bit of corrosion under there.=C2=A0 In a quiet place,=
turn on the key, don't start it, and you should be
able to hear the=C2=A0 stock voltage regulator ticking away..<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">For some more hints, =
here's a link to my old article on gauge troubleshooting.=C2=A0=C2=A0<u=
></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><a href=3D"http://www=
.tigersunited.com/techtips/BrennanGauge/rt-BrennanGauge1.asp" target=3D"_bl=
ank">TigersUnited.com</a><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">Both gauges have the =
same innards, so you can swap leads and see what happens with the pointer a=
ngles.=C2=A0 =C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">Stu<u></u><u></u></sp=
an></p>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Thu, Aug 21, 2025 at 5:57=E2=80=AFPM gharlowe--- =
via Tigers <<a href=3D"mailto:tigers@autox.team.net"; target=3D"_blank">t=
igers@autox.team.net</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-width:medium medium medium 1pt;border-style:non=
e none none solid;border-color:currentcolor currentcolor currentcolor rgb(2=
04,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Hey all =E2=80=93<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">It=E2=80=99s been quiet here so hoping to T-up an ea=
sy discussion.=C2=A0
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">My temp gauge is reading about 25 degrees high.=C2=
=A0 =C2=A0I noticed it after a shop installed a new clutch, which required =
the engine to be removed, coolant drained, etc., but nothing that
should have affected how the gauge reads.=C2=A0 Running on a cool day, tem=
ps were reading around 215-220 degrees.=C2=A0 To ensure I wasn=E2=80=99t ac=
tually in danger of overheating, I checked various water-cooled locations w=
ith an infrared thermometer.=C2=A0=C2=A0 Highest reading was
right at the water neck/thermostat housing (191 deg F).=C2=A0=C2=A0 The fu=
el gauge is reading accurately.=C2=A0 I understand the under-dash instrumen=
t stabilizer can affect both instruments, but in this case, only one gauge =
is off.=C2=A0 I plan to check the ground to the temp
gauge and clean contact points at the engine sending unit and at the gauge=
.=C2=A0=C2=A0 Any other suggestions?=C2=A0
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Thanks and I hope all is well out there!<u></u><u></=
u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Graham Harlowe<u></u><u></u></p>
<p class=3D"MsoNormal">B382001466<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">_______________________=
________________________<br>
<br>
<a href=3D"mailto:tigers@autox.team.net"; target=3D"_blank">tigers@autox.tea=
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</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
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