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Pat,
I agree. I looked all over in that 310 schematic for a voltage regulator bu=
t could not find one. I was surprised since almost all cars from those year=
s used voltage regulators to run the gauges.
Mike Lyons
Vancouver, WA
1967 SPL 311 with 135 HP 2000
1967 1/2 SPL 311
1983 280ZX Turbo
=20
=20
=20
-----Original Message-----
From: Pat Horne <patintexas@icloud.com>
To: mikelyons@aol.com
Cc: datsun-roadsters@autox.team.net <datsun-roadsters@autox.team.net>
Sent: Mon, May 11, 2020 1:42 pm
Subject: Re: [Roadsters] Fuel indication issues
Thanks, Mike. I=E2=80=99m not sure how this circuit compares to the 311 but=
I=E2=80=99ll check. One difference I see is that the 311s have a voltage r=
egulator for the instruments. I=E2=80=99ll have to check on the ground for =
the gauge. If there is one, that could cause this problem if it is bad.=C2=
=A0
Peace,Pat
Pat Horne=C2=A0We support Habitat for Humanity
On May 11, 2020, at 3:37 PM, mikelyons@aol.com wrote:
=EF=BB=BFI have the Nissan Service Manual for the SPL 310. The attached PDF=
is a copy of the information concerning trouble shooting the fuel gauge an=
d a wiring diagram.
I hope it can be of help.
Mike Lyons
Vancouver, WA
1967 SPL 311 with 135 HP 2000
1967 1/2 SPL 311
1983 280ZX Turbo
=20
=20
=20
-----Original Message-----
From: RWM via Datsun-roadsters <datsun-roadsters@autox.team.net>
To: Pat Horne <patintexas@icloud.com>
Cc: Datsun List <datsun-roadsters@autox.team.net>
Sent: Sat, May 9, 2020 1:57 pm
Subject: Re: [Roadsters] Fuel indication issues
Pat,
The black wire is zero (ground).
Guess I'll try to work my fingers up behind the gauge and check for continu=
ity.
Thanks.
- Bob
> On May 9, 2020, at 16:53, Pat Horne <patintexas@icloud.com> wrote:
>=20
> =EF=BB=BFBob,
> That sounds a bit off. The 7.6v on the yellow wire to ground is fine, but=
the black wire should be zero.=20
>=20
> When you ground the yellow wire to the body, the gauge should go to max. =
Sounds like you have a bad fuel gauge. Just to be sure you can try groundin=
g the terminal on the gauge that the yellow wire goes to.=20
>=20
> Peace,
> Pat
>=20
> Pat Horne=20
> We support Habitat for Humanity
>=20
>=20
>> On May 9, 2020, at 3:09 PM, RWM <RWM@rwmann.com> wrote:
>>=20
>=20
> =EF=BB=BFPat,
>=20
> With ignition switch in running position
>=20
> Yellow wire to chassis is 7.6 volts, same as to black wire
>=20
> Yellow wire to ground, no gauge deflection=20
>=20
> Thanks
>=20
> - Bob
>=20
>=20
>> On May 9, 2020, at 13:19, Pat Horne <patintexas@icloud.com> wrote:
>>=20
>> =EF=BB=BFHook everything back up except the sender. Turn on the key & me=
asure for voltage @ the sender wires to ground. One should show voltage & t=
he other should be grounded. (Not home now to get colors) ground the one wi=
th voltage. If the gauge still sits on empty you have a bad gauge. If there=
is no voltage it could be a bad connection or a bad gauge. Let me know wha=
t y=E2=80=99all find & I=E2=80=99ll walk you through more diagnostics.=20
>>=20
>> Peace,
>> Pat
>>=20
>>=20
>> Pat Horne=20
>> We support Habitat for Humanity
>>=20
>>=20
>>>>> On May 9, 2020, at 11:02 AM, RWM via Datsun-roadsters <datsun-roadste=
rs@autox.team.net> wrote:
>>>=20
>>=20
>> =EF=BB=BFThis has been discussed before, but here are the indications:
>>=20
>> Fuel gauge does not budge off empty=20
>>=20
>> Fuel sender resistance shows 34 ohms as installed, with tank less than h=
alf full
>>=20
>> Fuel sender resistance when removed varies fairly linearly from 47 ohms =
(bottom) to near zero ohms (near top), then open circuit when the arm force=
s the wiper off the rheostat windings
>>=20
>> Fuel harness is delivering 7.6 volts, measured with the yellow and black=
connectors removed
>>=20
>> Shorting the fuel harness to itself (yellow to black) does not change th=
e fuel gauge indication
>>=20
>> Ammeter works, temperature gauge works
>>=20
>> Ideas? Dash harness connector?
>>=20
>> Thanks.
>>=20
>> - Bob Mann, '68 2000 Solex
>>=20
>>=20
>> ________________________________________
>>=20
>> datsun-roadsters@autox.team.net
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/pipermail/datsun-roadsters http://autox.tea=
m.net/archive
>>=20
>> Unsubscribe: http://autox.team.net/mailman/options/datsun-roadsters/pati=
ntexas@icloud.com
>>=20
>>=20
>=20
________________________________________
datsun-roadsters@autox.team.net
Archive: http://www.team.net/pipermail/datsun-roadsters http://autox.team.n=
et/archive
Unsubscribe: http://autox.team.net/mailman/options/datsun-roadsters/mikelyo=
ns@aol.com
<SPL310 Fuel Gage.pdf>
------=_Part_1657665_744045783.1589231781090
Content-Transfer-Encoding: quoted-printable
<div style=3D"color:black;font: 10pt arial;">Pat<font size=3D"2">,<br>
<br>
I agree. I looked all over in that 310 schematic for a voltage regulator bu=
t could not find one. I was surprised since almost all cars from those year=
s used voltage regulators to run the gauges.<br>
<br>
</font><font size=3D"2">Mike Lyons<br clear=3D"none">
Vancouver, WA<br clear=3D"none">
1967 SPL 311 with 135 HP 2000<br clear=3D"none">
1967 1/2 SPL 311<br clear=3D"none">
1983 280ZX Turbo</font><br>
<font size=3D"2"></font>
<div> <br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Pat Horne <patintexas@icloud.com><br>
To: mikelyons@aol.com<br>
Cc: datsun-roadsters@autox.team.net <datsun-roadsters@autox.team.net>=
<br>
Sent: Mon, May 11, 2020 1:42 pm<br>
Subject: Re: [Roadsters] Fuel indication issues<br>
<br>
<div id=3D"yiv8821845970">
<div>Thanks, Mike. I=E2=80=99m not sure how this circuit compares to the 31=
1 but I=E2=80=99ll check. One difference I see is that the 311s have a volt=
age regulator for the instruments. I=E2=80=99ll have to check on the ground=
for the gauge. If there is one, that could cause this problem if it is bad=
.
<div><br clear=3D"none"></div>
<div>Peace,</div>
<div>Pat<br clear=3D"none"><br clear=3D"none">
<div dir=3D"ltr">Pat Horne
<div>We support Habitat for Humanity</div>
<div><br clear=3D"none"></div>
</div>
<div dir=3D"ltr"><br clear=3D"none">On May 11, 2020, at 3:37 PM, mikelyons@=
aol.com wrote:<br clear=3D"none"><br clear=3D"none"></div>
<div dir=3D"ltr">=EF=BB=BF
<div class=3D"yiv8821845970yqt2709499303" id=3D"yiv8821845970yqt36642">
<div style=3D"color:black;font:10pt arial;">I <font size=3D"2">have the Nis=
san Service Manual for the SPL 310. The attached PDF is a copy of the infor=
mation concerning trouble shooting the fuel gauge and a wiring diagram.<br =
clear=3D"none">
<br clear=3D"none">
I hope it can be of help.<br clear=3D"none">
<br clear=3D"none">
Mike Lyons<br clear=3D"none">
Vancouver, WA<br clear=3D"none">
1967 SPL 311 with 135 HP 2000<br clear=3D"none">
1967 1/2 SPL 311<br clear=3D"none">
1983 280ZX Turbo<br clear=3D"none">
</font>
<div> <br clear=3D"none">
</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;">---=
--Original Message-----<br clear=3D"none">
From: RWM via Datsun-roadsters <datsun-roadsters@autox.team.net><br c=
lear=3D"none">
To: Pat Horne <patintexas@icloud.com><br clear=3D"none">
Cc: Datsun List <datsun-roadsters@autox.team.net><br clear=3D"none">
Sent: Sat, May 9, 2020 1:57 pm<br clear=3D"none">
Subject: Re: [Roadsters] Fuel indication issues<br clear=3D"none">
<br clear=3D"none">
<div dir=3D"ltr">Pat,<br clear=3D"none"><br clear=3D"none">The black wire i=
s zero (ground).<br clear=3D"none"><br clear=3D"none">Guess I'll try to wor=
k my fingers up behind the gauge and check for continuity.<br clear=3D"none=
"><br clear=3D"none">Thanks.<br clear=3D"none"><br clear=3D"none">- Bob<br =
clear=3D"none"><br clear=3D"none"><br clear=3D"none">
<div class=3D"yiv8821845970yqt5933953826" id=3D"yiv8821845970yqtfd68763"><b=
r clear=3D"none">> On May 9, 2020, at 16:53, Pat Horne <<a rel=3D"nof=
ollow" shape=3D"rect" ymailto=3D"mailto:patintexas@icloud.com"; target=3D"_b=
lank" href=3D"mailto:patintexas@icloud.com";>patintexas@icloud.com</a>> w=
rote:<br clear=3D"none">> <br clear=3D"none">> =EF=BB=BFBob,<br clear=
=3D"none">> That sounds a bit off. The 7.6v on the yellow wire to ground=
is fine, but the black wire should be zero. <br clear=3D"none">> <br cl=
ear=3D"none">> When you ground the yellow wire to the body, the gauge sh=
ould go to max. Sounds like you have a bad fuel gauge. Just to be sure you =
can try grounding the terminal on the gauge that the yellow wire goes to. <=
br clear=3D"none">> <br clear=3D"none">> Peace,<br clear=3D"none">>=
; Pat<br clear=3D"none">> <br clear=3D"none">> Pat Horne <br clear=3D=
"none">> We support Habitat for Humanity<br clear=3D"none">> <br clea=
r=3D"none">> <br clear=3D"none">>> On May 9, 2020, at 3:09 PM, RWM=
<<a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:RWM@rwmann.com"; t=
arget=3D"_blank" href=3D"mailto:RWM@rwmann.com";>RWM@rwmann.com</a>> wrot=
e:<br clear=3D"none">>> <br clear=3D"none">> <br clear=3D"none">&g=
t; =EF=BB=BFPat,<br clear=3D"none">> <br clear=3D"none">> With igniti=
on switch in running position<br clear=3D"none">> <br clear=3D"none">>=
; Yellow wire to chassis is 7.6 volts, same as to black wire<br clear=3D"no=
ne">> <br clear=3D"none">> Yellow wire to ground, no gauge deflection=
<br clear=3D"none">> <br clear=3D"none">> Thanks<br clear=3D"none">&=
gt; <br clear=3D"none">> - Bob<br clear=3D"none">> <br clear=3D"none"=
>> <br clear=3D"none">>> On May 9, 2020, at 13:19, Pat Horne <<=
a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:patintexas@icloud.com"; =
target=3D"_blank" href=3D"mailto:patintexas@icloud.com";>patintexas@icloud.c=
om</a>> wrote:<br clear=3D"none">>> <br clear=3D"none">>> =
=EF=BB=BFHook everything back up except the sender. Turn on the key & m=
easure for voltage @ the sender wires to ground. One should show voltage &a=
mp; the other should be grounded. (Not home now to get colors) ground the o=
ne with voltage. If the gauge still sits on empty you have a bad gauge. If =
there is no voltage it could be a bad connection or a bad gauge. Let me kno=
w what y=E2=80=99all find & I=E2=80=99ll walk you through more diagnost=
ics. <br clear=3D"none">>> <br clear=3D"none">>> Peace,<br clea=
r=3D"none">>> Pat<br clear=3D"none">>> <br clear=3D"none">>&=
gt; <br clear=3D"none">>> Pat Horne <br clear=3D"none">>> We su=
pport Habitat for Humanity<br clear=3D"none">>> <br clear=3D"none">&g=
t;> <br clear=3D"none">>>>>> On May 9, 2020, at 11:02 AM,=
RWM via Datsun-roadsters <<a rel=3D"nofollow" shape=3D"rect" ymailto=3D=
"mailto:datsun-roadsters@autox.team.net"; target=3D"_blank" href=3D"mailto:d=
atsun-roadsters@autox.team.net">datsun-roadsters@autox.team.net</a>> wro=
te:<br clear=3D"none">>>> <br clear=3D"none">>> <br clear=3D=
"none">>> =EF=BB=BFThis has been discussed before, but here are the i=
ndications:<br clear=3D"none">>> <br clear=3D"none">>> Fuel gau=
ge does not budge off empty <br clear=3D"none">>> <br clear=3D"none">=
>> Fuel sender resistance shows 34 ohms as installed, with tank less =
than half full<br clear=3D"none">>> <br clear=3D"none">>> Fuel =
sender resistance when removed varies fairly linearly from 47 ohms (bottom)=
to near zero ohms (near top), then open circuit when the arm forces the wi=
per off the rheostat windings<br clear=3D"none">>> <br clear=3D"none"=
>>> Fuel harness is delivering 7.6 volts, measured with the yellow an=
d black connectors removed<br clear=3D"none">>> <br clear=3D"none">&g=
t;> Shorting the fuel harness to itself (yellow to black) does not chang=
e the fuel gauge indication<br clear=3D"none">>> <br clear=3D"none">&=
gt;> Ammeter works, temperature gauge works<br clear=3D"none">>> <=
br clear=3D"none">>> Ideas? Dash harness connector?<br clear=3D"none"=
>>> <br clear=3D"none">>> Thanks.<br clear=3D"none">>> <b=
r clear=3D"none">>> - Bob Mann, '68 2000 Solex<br clear=3D"none">>=
> <br clear=3D"none">>> <br clear=3D"none">>> ______________=
__________________________<br clear=3D"none">>> <br clear=3D"none">&g=
t;> <a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:datsun-roadster=
s@autox.team.net" target=3D"_blank" href=3D"mailto:datsun-roadsters@autox.t=
eam.net">datsun-roadsters@autox.team.net</a><br clear=3D"none">>> <br=
clear=3D"none">>> Donate: <a rel=3D"nofollow" shape=3D"rect" target=
=3D"_blank" href=3D"http://www.team.net/donate.html";>http://www.team.net/do=
nate.html</a><br clear=3D"none">>> Archive: <a rel=3D"nofollow" shape=
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adsters">http://www.team.net/pipermail/datsun-roadsters </a><a rel=3D"nofol=
low" shape=3D"rect" target=3D"_blank" href=3D"http://autox.team.net/archive=
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tintexas@icloud.com</a><br clear=3D"none">>> <br clear=3D"none">>&=
gt; <br clear=3D"none">> <br clear=3D"none"><br clear=3D"none">_________=
_______________________________<br clear=3D"none"><br clear=3D"none"><a rel=
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</div>
</div>
</div>
</div>
<div><SPL310 Fuel Gage.pdf></div>
</div>
</div>
</div>
</div>
</div>
</div>
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