Subject: [TR] Fuel gage / sending unit issue - Spit bodied GT6

From: aribert neumann <[email-masked]>
Date: Tue, 11 Oct 2022 20:46:55 -0400

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Greetings all.   Long time since I've posted, my car has, up till
yesterday, been behaving itself nicely.   Yesterday the driver's door glass
dropped off of the window regulator as I was trying to wind up the window
prior to backing out of the garage.  Then later the same day the fuel gauge
suddenly displayed well past a full tank.  The tank is at about 1/3 to 1/2
full.

The water temp gauge is reading correctly so I am thinking the bimetal
voltage stabilizer is OK.  I checked the connections at both the tank and
gage.  I checked that the ground lead at the tank was grounded.   I am
measuring about 67ohm across the sending unit terminals.   The Bently
manual is worthless on this subject - simply stating that there is no
repair to either gage or sending unit and replacement is the repair
method.  No resistance values given for empty and full tank.  Frustrating.
Before I order a fuel tank sending unit, does anyone know what the ballpark
resistance values might be?   What am I forgetting to check?

TIA.   Off in digest mode awaiting your answers.

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<div dir=3D"ltr">Greetings all.=C2=A0 =C2=A0Long time since I&#39;ve posted=
, my car has, up till yesterday, been behaving itself nicely.=C2=A0 =C2=A0Y=
esterday the driver&#39;s door glass dropped off of the window regulator as=
 I was trying to wind up the window prior to backing out of the garage.=C2=
=A0 Then later=C2=A0the same day the fuel gauge suddenly displayed well pas=
t a full tank.=C2=A0 The tank is at about 1/3 to 1/2 full.=C2=A0=C2=A0<div>=
<br></div><div>The=C2=A0water temp gauge=C2=A0is reading correctly so I am =
thinking the=C2=A0bimetal voltage stabilizer is OK.=C2=A0 I checked the con=
nections at both the tank and gage.=C2=A0 I checked that the ground lead at=
 the tank was grounded.=C2=A0 =C2=A0I am measuring about 67ohm=C2=A0across =
the sending unit terminals.=C2=A0 =C2=A0The Bently manual is worthless on t=
his subject - simply stating that there is no repair to either gage or send=
ing unit and replacement is the repair method.=C2=A0 No resistance values g=
iven for empty and full tank.=C2=A0 Frustrating.=C2=A0 Before I order a fue=
l tank sending unit, does anyone know what the ballpark resistance values m=
ight be?=C2=A0 =C2=A0What am I forgetting to check?=C2=A0 =C2=A0</div><div>=
<br></div><div>TIA.=C2=A0 =C2=A0Off in digest mode awaiting your answers.</=
div></div>

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** [email-masked] **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive

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From: Dave Connitt <[email-masked]>
Date: Wed, 12 Oct 2022 12:40:58 -0400

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Hi Albert,
I have a TR4A fuel sending unit at home and will measure the resistance rang=
e tonight and get back to you. First thing to go is the memory and I forgot w=
hat the second thing is=F0=9F=98=81.
Dave Connitt=20

Sent from my iPhone

> On Oct 12, 2022, at 12:27 PM, DAVID MASSEY <[email-masked]> wrote:
>=20
> =EF=BB=BF
> I'm not sure but I seem to recall that 67 ohms is in the normal range for t=
he sending unit.  I suspect the gauge is faulty.
>=20
> If you have a spare or if you know someone with a spare you can try swappi=
ng it out.
>=20
> Dave=20
>=20
>=20
>=20
>=20
> -----Original Message-----
> From: aribert neumann <[email-masked]>
> To: DAVID MASSEY <[email-masked]>; [email-masked]
> Sent: Wed, Oct 12, 2022 6:40 am
> Subject: Re: [TR] Fuel gage / sending unit issue - Spit bodied GT6
>=20
> Dave:
> Thanks for the reply.  The gage drops to zero when either wire is removed f=
rom the sending unit.
>=20
> All:
> Any info on sending unit resistance (even from other Triumph lines such as=
 the TR4, 250, 6) would be appreciated - I am guessing that the same supplie=
r (Smiths) was used for multiple lines and that the values would be somewhat=
 similar.
>=20
> On Wed, Oct 12, 2022 at 7:29 AM DAVID MASSEY <[email-masked]> wrote:
> What happens when you leave the wire off of the sending unit?  Does the ga=
uge still go full-scale or does it read zero?  It could be a short in the wi=
ring.
>=20
> Dave=20
>=20
>=20
>=20
>=20
> -----Original Message-----
> From: aribert neumann <[email-masked]>
> To: [email-masked]
> Sent: Tue, Oct 11, 2022 7:46 pm
> Subject: [TR] Fuel gage / sending unit issue - Spit bodied GT6
>=20
> Greetings all.   Long time since I've posted, my car has, up till yesterda=
y, been behaving itself nicely.   Yesterday the driver's door glass dropped o=
ff of the window regulator as I was trying to wind up the window prior to ba=
cking out of the garage.  Then later the same day the fuel gauge suddenly di=
splayed well past a full tank.  The tank is at about 1/3 to 1/2 full. =20
>=20
> The water temp gauge is reading correctly so I am thinking the bimetal vol=
tage stabilizer is OK.  I checked the connections at both the tank and gage.=
  I checked that the ground lead at the tank was grounded.   I am measuring a=
bout 67ohm across the sending unit terminals.   The Bently manual is worthle=
ss on this subject - simply stating that there is no repair to either gage o=
r sending unit and replacement is the repair method.  No resistance values g=
iven for empty and full tank.  Frustrating.  Before I order a fuel tank send=
ing unit, does anyone know what the ballpark resistance values might be?   W=
hat am I forgetting to check?  =20
>=20
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dave1ma=
[email-masked]
>=20
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> Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archi=
ve
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dconnit=
[email-masked]

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Hi Albert,<div>I have a TR4A fuel sending u=
nit at home and will measure the resistance range tonight and get back to yo=
u. First thing to go is the memory and I forgot what the second thing is=F0=9F=
=98=81.</div><div>Dave Connitt&nbsp;</div><div><br><div dir=3D"ltr">Sent fro=
m my iPhone</div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Oct 12, 2=
022, at 12:27 PM, DAVID MASSEY &lt;[email-masked]&gt; wrote:<br><br></bl=
ockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF
<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">I'm not sure but I seem to recall that 67 ohms is in t=
he normal range for the sending unit.&nbsp; I suspect the gauge is faulty.</=
font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">If you have a spare or if you know someone with a spar=
e you can try swapping it out.<br>
</font></div>

<div> <br>
</div>

<div style=3D"clear:both">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div><font size=3D"4">Dave <br>
</font></div>

<div><span style=3D"font-size:10.0pt;font-family:sans-serif;color:black;"><b=
r>
</span></div>
<br>
</div>
</div>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font s=
ize=3D"2">-----Original Message-----<br>
From: aribert neumann &lt;[email-masked]&gt;<br>
To: DAVID MASSEY &lt;[email-masked]&gt;; [email-masked]<br>
Sent: Wed, Oct 12, 2022 6:40 am<br>
Subject: Re: [TR] Fuel gage / sending unit issue - Spit bodied GT6<br>
<br>

<div id=3D"yiv8842995916">
<div>
<div dir=3D"ltr">Dave:
<div>Thanks for the reply.&nbsp; The gage drops to zero when either wire is r=
emoved from the sending unit.</div>

<div><br clear=3D"none"></div>

<div>All:</div>

<div>Any info on sending unit resistance (even from other Triumph lines such=
 as the TR4, 250, 6) would be appreciated - I am guessing that the same supp=
lier (Smiths) was used for multiple lines and that the values would be somew=
hat similar.</div>
</div>
<br clear=3D"none">
<div id=3D"yiv8842995916yqt96497" class=3D"yiv8842995916yqt0874371209">
<div class=3D"yiv8842995916gmail_quote">
<div dir=3D"ltr" class=3D"yiv8842995916gmail_attr">On Wed, Oct 12, 2022 at 7=
:29 AM DAVID MASSEY &lt;<a rel=3D"nofollow noopener noreferrer" shape=3D"rec=
t" ymailto=3D"mailto:[email-masked]" target=3D"_blank" href=3D"mailto:da=
[email-masked]">[email-masked]</a>&gt; wrote:<br clear=3D"none"></div>=

<blockquote style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex;" class=3D"yiv8842995916gmail_quote">

<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">

<div> <font size=3D"3">What happens when you leave the wire off of the sendi=
ng unit?&nbsp; Does the gauge still go full-scale or does it read zero?&nbsp=
; It could be a short in the wiring.</font><br clear=3D"none">
</div>

<div> <br clear=3D"none">
</div>

<div style=3D"clear:both;">

<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">

<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">

<div><font size=3D"4">Dave <br clear=3D"none">
</font></div>

<div><span style=3D"font-size:10pt;font-family:sans-serif;color:black;"><br c=
lear=3D"none">
</span></div>

<br clear=3D"none">
</div>

</div>

</div>

<div> <br clear=3D"none">
</div>

<div> <br clear=3D"none">
</div>

<div style=3D"font-family:arial, helvetica;font-size:10pt;color:black;"><fon=
t size=3D"2">-----Original Message-----<br clear=3D"none">
From: aribert neumann &lt;<a rel=3D"nofollow noopener noreferrer" shape=3D"r=
ect" ymailto=3D"mailto:[email-masked]" target=3D"_blank" href=3D"mailto:=
[email-masked]">[email-masked]</a>&gt;<br clear=3D"none">
To: <a rel=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"mailto=
:[email-masked]" target=3D"_blank" href=3D"mailto:[email-masked]=
am.net">[email-masked]</a><br clear=3D"none">
Sent: Tue, Oct 11, 2022 7:46 pm<br clear=3D"none">
Subject: [TR] Fuel gage / sending unit issue - Spit bodied GT6<br clear=3D"n=
one">
<br clear=3D"none">

</font>
<div id=3D"yiv8842995916m_142164537886806319yiv9269333458">

<div dir=3D"ltr">Greetings all.&nbsp; &nbsp;Long time since I've posted, my c=
ar has, up till yesterday, been behaving itself nicely.&nbsp; &nbsp;Yesterda=
y the driver's door glass dropped off of the window regulator as I was tryin=
g to wind up the window prior to backing out of the garage.&nbsp; Then later=
&nbsp;the same day the fuel gauge suddenly displayed well past a full tank.&=
nbsp; The tank is at about 1/3 to 1/2 full.&nbsp;&nbsp;

<div><br clear=3D"none">
</div>

<div>The&nbsp;water temp gauge&nbsp;is reading correctly so I am thinking th=
e&nbsp;bimetal voltage stabilizer is OK.&nbsp; I checked the connections at b=
oth the tank and gage.&nbsp; I checked that the ground lead at the tank was g=
rounded.&nbsp; &nbsp;I am measuring about 67ohm&nbsp;across the sending unit=
 terminals.&nbsp; &nbsp;The Bently manual is worthless on this subject - sim=
ply stating that there is no repair to either gage or sending unit and repla=
cement is the repair method.&nbsp; No resistance values given for empty and f=
ull tank.&nbsp; Frustrating.&nbsp; Before I order a fuel tank sending unit, d=
oes anyone know what the ballpark resistance values might be?&nbsp; &nbsp;Wh=
at am I forgetting to check?&nbsp; &nbsp;</div>

<div><br clear=3D"none">
</div>

<div>TIA.&nbsp; &nbsp;Off in digest mode awaiting your answers.</div>

</div>

</div>

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From: Q <[email-masked]>
Date: Wed, 12 Oct 2022 17:53:49 -0400

Using a flash light you should be able to see the wire that supports the 
sending unit looking down the gas cap.  Use a piece of bent wire and 
move the float throughout its range and observe the gauge.  Don't for 
get that the gauge is stabilized so the needle moves slowly regardless 
of how quickly you move the float.

Also if the float is at the bottom of the tank while the fuel level is 
higher then your float is bad.

Generally speaking it is the sending units that go bad.  the "wiper" 
that is actuated by the float wears out the wrapped resistance wire on 
the sending unit.  Usually bunching it up and causing false readings.  
No point in trying to fix it, just replace it.

Edward Hamer

Petaluma CA

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