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Quick and dirty test : Remove the wire from the sender, turn the key on, an=
d ground the wire while watching the gauge. If the gauge starts to climb t=
owards full, then the gauge & wiring to it are probably OK. Probably best =
to not leave it this way for long, but a few minutes won=E2=80=99t hurt.
My next suspect (especially since it worked before restoration) would be th=
e grounding for the sender. IIRC the TR4 grounds the same as TR3, meaning =
not very well. I like to add a ground wire from the stud on the sender to =
one of the tank mounting bolts.
Use an ohmmeter to check the sender. I don=E2=80=99t recall the exact numb=
ers offhand, but it=E2=80=99s something like 100 ohms empty and 10 ohms ful=
l. If it seems to work backwards (low resistance empty and high resistance=
full), you=E2=80=99ve got a TR3 sender instead of TR4.
Also worth checking the temp gauge if the first test above doesn=E2=80=99t =
work. Do the same thing, pull the wire off the sender and ground it. If t=
emp gauge doesn=E2=80=99t respond either, it=E2=80=99s probably the voltage=
stabilizer. Seems like maybe it=E2=80=99s mounted over in the passenger f=
ootwell on a TR4, but honestly I don=E2=80=99t recall for sure.
-- Randall
Sent from Mail for Windows 10
From: Jim Henningsen
Sent: Saturday, August 17, 2019 6:54 PM
To: 'Triumphs'
Subject: [TR] Fuel gauge troubles
Help, I'm calling the TR bat phone again. Switching projects to get my car
ready for AACC southeastern fall nationals on Mobile AL. 1962 TR4 CT5212LO=
.
Fuel gauge worked prior to restoration but not after. Car is switched to
neg ground. Orig fuel sender float was sunk in tank. Removed it and
verified there is gas in it. Hoping there is a way to rebuild it since ori=
g
part. Put in a new sending unit from TRF this morning and added 7 gallons
of gas and it still doesn't work but float rises. The needle moved ever so
slightly right above E then dropped back down with ignition on. I even use=
d
a coat hanger to manually raise the float in the gas tank to "full" with
ignition on but needle still didn't work. Ignition in "On" position, but
not running. =20
My thoughts.
1. Bad gauge?
2. Wires reversed on fuel gauge from resto impacting since it is neg not
original positive ground. Running generator that has been polarized to neg
ground. =20
3. connections at new sending unit not secure. Neg is to ground and positiv=
e
to pos on sending unit
4. new sender bad
Any thoughts on the possible easy fix before going through the list
tomorrow. Also, if anyone is looking for a nice 73 Stag with hardtop,
manual tran, that has been owned by a TR owner of 60+ tyears and avid VTR
member, it is for sale in Tally. I am trying to help the family find a hom=
e
for it. Email me offline if you would like pics and contact info.
Many thanks,
Jim Henningsen
Ocala, FL
60 TR3A
61 TR3A
62 TR4
75 TR6
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
r@ca.rr.com
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72"><div cla=
ss=3DWordSection1><p class=3DMsoNormal>Quick and dirty test : Remove the wi=
re from the sender, turn the key on, and ground the wire while watching the=
gauge.=C2=A0 If the gauge starts to climb towards full, then the gauge &am=
p; wiring to it are probably OK.=C2=A0 Probably best to not leave it this w=
ay for long, but a few minutes won=E2=80=99t hurt.</p><p class=3DMsoNormal>=
<o:p> </o:p></p><p class=3DMsoNormal>My next suspect (especially since=
it worked before restoration) would be the grounding for the sender.=C2=A0=
IIRC the TR4 grounds the same as TR3, meaning not very well.=C2=A0 I like =
to add a ground wire from the stud on the sender to one of the tank mountin=
g bolts.</p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>=
Use an ohmmeter to check the sender.=C2=A0 I don=E2=80=99t recall the exact=
numbers offhand, but it=E2=80=99s something like 100 ohms empty and 10 ohm=
s full.=C2=A0 If it seems to work backwards (low resistance empty and high =
resistance full), you=E2=80=99ve got a TR3 sender instead of TR4.</p><p cla=
ss=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Also worth checkin=
g the temp gauge if the first test above doesn=E2=80=99t work.=C2=A0 Do the=
same thing, pull the wire off the sender and ground it.=C2=A0 If temp gaug=
e doesn=E2=80=99t respond either, it=E2=80=99s probably the voltage stabili=
zer.=C2=A0 Seems like maybe it=E2=80=99s mounted over in the passenger foot=
well on a TR4, but honestly I don=E2=80=99t recall for sure.</p><p class=3D=
MsoNormal><o:p> </o:p></p><p class=3DMsoNormal>-- Randall</p><p class=
=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Sent from <a href=3D=
"https://go.microsoft.com/fwlink/?LinkId=3D550986";>Mail</a> for Windows 10<=
/p><p class=3DMsoNormal><o:p> </o:p></p><div style=3D'mso-element:para=
-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0i=
n 0in'><p class=3DMsoNormal style=3D'border:none;padding:0in'><b>From: </b>=
<a href=3D"mailto:trguy75@gmail.com";>Jim Henningsen</a><br><b>Sent: </b>Sat=
urday, August 17, 2019 6:54 PM<br><b>To: </b><a href=3D"mailto:triumphs@aut=
ox.team.net">'Triumphs'</a><br><b>Subject: </b>[TR] Fuel gauge troubles</p>=
</div><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Help, =
I'm calling the TR bat phone again.=C2=A0 Switching projects to get my car<=
/p><p class=3DMsoNormal>ready for AACC southeastern fall nationals on Mobil=
e AL.=C2=A0 1962 TR4 CT5212LO.</p><p class=3DMsoNormal>Fuel gauge worked pr=
ior to restoration but not after.=C2=A0 Car is switched to</p><p class=3DMs=
oNormal>neg ground.=C2=A0 Orig fuel sender float was sunk in tank.=C2=A0 Re=
moved it and</p><p class=3DMsoNormal>verified there is gas in it.=C2=A0 Hop=
ing there is a way to rebuild it since orig</p><p class=3DMsoNormal>part.=
=C2=A0 Put in a new sending unit from TRF this morning and added 7 gallons<=
/p><p class=3DMsoNormal>of gas and it still doesn't work but float rises.=
=C2=A0 The needle moved ever so</p><p class=3DMsoNormal>slightly right abov=
e E then dropped back down with ignition on.=C2=A0 I even used</p><p class=
=3DMsoNormal>a coat hanger to manually raise the float in the gas tank to &=
quot;full" with</p><p class=3DMsoNormal>ignition on but needle still d=
idn't work.=C2=A0 Ignition in "On" position, but</p><p class=3DMs=
oNormal>not running.=C2=A0 </p><p class=3DMsoNormal><o:p> </o:p></p><p=
class=3DMsoNormal>My thoughts.</p><p class=3DMsoNormal>1. Bad gauge?</p><p=
class=3DMsoNormal>2. Wires reversed on fuel gauge from resto impacting sin=
ce it is neg not</p><p class=3DMsoNormal>original positive ground.=C2=A0 Ru=
nning generator that has been polarized to neg</p><p class=3DMsoNormal>grou=
nd.=C2=A0 </p><p class=3DMsoNormal>3. connections at new sending unit not s=
ecure. Neg is to ground and positive</p><p class=3DMsoNormal>to pos on send=
ing unit</p><p class=3DMsoNormal>4. new sender bad</p><p class=3DMsoNormal>=
<o:p> </o:p></p><p class=3DMsoNormal>Any thoughts on the possible easy=
fix before going through the list</p><p class=3DMsoNormal>tomorrow.=C2=A0 =
Also, if anyone is looking for a nice 73 Stag with hardtop,</p><p class=3DM=
soNormal>manual tran, that has been owned by a TR owner of 60+ tyears and a=
vid VTR</p><p class=3DMsoNormal>member, it is for sale in Tally.=C2=A0 I am=
trying to help the family find a home</p><p class=3DMsoNormal>for it.=C2=
=A0 Email me offline if you would like pics and contact info.</p><p class=
=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Many thanks,</p><p c=
lass=3DMsoNormal>Jim Henningsen</p><p class=3DMsoNormal>Ocala, FL</p><p cla=
ss=3DMsoNormal>60 TR3A</p><p class=3DMsoNormal>61 TR3A</p><p class=3DMsoNor=
mal>62 TR4</p><p class=3DMsoNormal>75 TR6</p><p class=3DMsoNormal><o:p>&nbs=
p;</o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>=
** triumphs@autox.team.net **</p><p class=3DMsoNormal><o:p> </o:p></p>=
<p class=3DMsoNormal>Donate: http://www.team.net/donate.html</p><p class=3D=
MsoNormal>Archive: http://www.team.net/pipermail/triumphs=C2=A0 http://www.=
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oNormal>Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/=
tr3driver@ca.rr.com</p><p class=3DMsoNormal><o:p> </o:p></p></div></bo=
dy></html>=
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