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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 regu=
lator for the instruments. I=E2=80=99ll have to check on the ground for the g=
auge. If there is one, that could cause this problem if it is bad.=20
Peace,
Pat
Pat Horne=20
We support Habitat for Humanity
On May 11, 2020, at 3:37 PM, mikelyons@aol.com wrote:
=EF=BB=BF
I have the Nissan Service Manual for the SPL 310. The attached PDF is a copy=
of the information concerning trouble shooting the fuel gauge and a wiring d=
iagram.
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
-----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 continui=
ty.
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 t=
he black wire should be zero.=20
>=20
> When you ground the yellow wire to the body, the gauge should go to max. S=
ounds like you have a bad fuel gauge. Just to be sure you can try grounding t=
he 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 & mea=
sure for voltage @ the sender wires to ground. One should show voltage & the=
other should be grounded. (Not home now to get colors) ground the one with v=
oltage. If the gauge still sits on empty you have a bad gauge. If there is n=
o voltage it could be a bad connection or a bad gauge. Let me know what 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-roadster=
s@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 ha=
lf 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 forces t=
he wiper off the rheostat windings
>>=20
>> Fuel harness is delivering 7.6 volts, measured with the yellow and black c=
onnectors removed
>>=20
>> Shorting the fuel harness to itself (yellow to black) does not change the=
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.team=
.net/archive
>>=20
>> Unsubscribe: http://autox.team.net/mailman/options/datsun-roadsters/patin=
texas@icloud.com
>>=20
>>=20
>=20
________________________________________
datsun-roadsters@autox.team.net
Archive: http://www.team.net/pipermail/datsun-roadsters http://autox.team.ne=
t/archive
Unsubscribe: http://autox.team.net/mailman/options/datsun-roadsters/mikelyon=
s@aol.com
<SPL310 Fuel Gage.pdf>=
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Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">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 regulator for the instruments. I=E2=80=99ll ha=
ve to check on the ground for the gauge. If there is one, that could cause t=
his problem if it is bad. <div><br></div><div>Peace,</div><div>Pat<br><=
br><div dir=3D"ltr">Pat Horne <div>We support Habitat for Humanity</div=
><div><br></div></div><div dir=3D"ltr"><br>On May 11, 2020, at 3:37 PM, mike=
lyons@aol.com wrote:<br><br></div><div dir=3D"ltr">=EF=BB=BF
<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 inform=
ation concerning trouble shooting the fuel gauge and a wiring diagram.<br>
<br>
I hope it can be of help.<br>
<br>
Mike Lyons<br>
Vancouver, WA<br>
1967 SPL 311 with 135 HP 2000<br>
1967 1/2 SPL 311<br>
1983 280ZX Turbo<br>
</font>
<div> <br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----O=
riginal Message-----<br>
From: RWM via Datsun-roadsters <datsun-roadsters@autox.team.net><br>
To: Pat Horne <patintexas@icloud.com><br>
Cc: Datsun List <datsun-roadsters@autox.team.net><br>
Sent: Sat, May 9, 2020 1:57 pm<br>
Subject: Re: [Roadsters] Fuel indication issues<br>
<br>
<div dir=3D"ltr">Pat,<br clear=3D"none"><br clear=3D"none">The black wire is=
zero (ground).<br clear=3D"none"><br clear=3D"none">Guess I'll try to work m=
y fingers up behind the gauge and check for continuity.<br clear=3D"none"><b=
r 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"yqt5933953826" id=3D"yqtfd68763"><br clear=3D"none">> On Ma=
y 9, 2020, at 16:53, Pat Horne <<a shape=3D"rect" ymailto=3D"mailto:patin=
texas@icloud.com" href=3D"mailto:patintexas@icloud.com";>patintexas@icloud.co=
m</a>> wrote:<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 t=
o ground is fine, but the black wire should be zero. <br clear=3D"none">>=
<br clear=3D"none">> When you ground the yellow wire to the body, the ga=
uge should 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 t=
o. <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 clear=
=3D"none">> <br clear=3D"none">>> On May 9, 2020, at 3:09 PM, RWM &=
lt;<a shape=3D"rect" ymailto=3D"mailto:RWM@rwmann.com"; href=3D"mailto:RWM@rw=
mann.com">RWM@rwmann.com</a>> wrote:<br clear=3D"none">>> <br clear=
=3D"none">> <br clear=3D"none">> =EF=BB=BFPat,<br clear=3D"none">> <=
br clear=3D"none">> With ignition 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"none">> <br clear=3D"none">> Yellow wire=
to ground, no gauge deflection <br clear=3D"none">> <br clear=3D"none">&=
gt; Thanks<br clear=3D"none">> <br clear=3D"none">> - Bob<br clear=3D"=
none">> <br clear=3D"none">> <br clear=3D"none">>> On May 9, 202=
0, at 13:19, Pat Horne <<a shape=3D"rect" ymailto=3D"mailto:patintexas@ic=
loud.com" href=3D"mailto:patintexas@icloud.com";>patintexas@icloud.com</a>>=
; wrote:<br clear=3D"none">>> <br clear=3D"none">>> =EF=BB=BFHoo=
k everything back up except the sender. Turn on the key & measure for vo=
ltage @ the sender wires to ground. One should show voltage & the other s=
hould be grounded. (Not home now to get colors) ground the one with voltage.=
If the gauge still sits on empty you have a bad gauge. If there is no volta=
ge it could be a bad connection or a bad gauge. Let me know what y=E2=80=99a=
ll find & I=E2=80=99ll walk you through more diagnostics. <br clear=3D"n=
one">>> <br clear=3D"none">>> Peace,<br clear=3D"none">>> P=
at<br clear=3D"none">>> <br clear=3D"none">>> <br clear=3D"none"=
>>> Pat Horne <br clear=3D"none">>> We support Habitat for Human=
ity<br clear=3D"none">>> <br clear=3D"none">>> <br clear=3D"none=
">>>>>> On May 9, 2020, at 11:02 AM, RWM via Datsun-roadsters=
<<a shape=3D"rect" ymailto=3D"mailto:datsun-roadsters@autox.team.net"; hr=
ef=3D"mailto:datsun-roadsters@autox.team.net";>datsun-roadsters@autox.team.ne=
t</a>> wrote:<br clear=3D"none">>>> <br clear=3D"none">>> <=
br clear=3D"none">>> =EF=BB=BFThis has been discussed before, but here=
are the indications:<br clear=3D"none">>> <br clear=3D"none">>>=
Fuel gauge 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 (bot=
tom) to near zero ohms (near top), then open circuit when the arm forces the=
wiper off the rheostat windings<br clear=3D"none">>> <br clear=3D"non=
e">>> Fuel harness is delivering 7.6 volts, measured with the yellow a=
nd black connectors removed<br clear=3D"none">>> <br clear=3D"none">&g=
t;> Shorting the fuel harness to itself (yellow to black) does not change=
the fuel gauge indication<br clear=3D"none">>> <br clear=3D"none">>=
;> Ammeter works, temperature gauge works<br clear=3D"none">>> <br c=
lear=3D"none">>> Ideas? Dash harness connector?<br clear=3D"none">>=
> <br clear=3D"none">>> Thanks.<br clear=3D"none">>> <br clea=
r=3D"none">>> - Bob Mann, '68 2000 Solex<br clear=3D"none">>> <b=
r clear=3D"none">>> <br clear=3D"none">>> ______________________=
__________________<br clear=3D"none">>> <br clear=3D"none">>> <a=
shape=3D"rect" ymailto=3D"mailto:datsun-roadsters@autox.team.net"; href=3D"m=
ailto:datsun-roadsters@autox.team.net">datsun-roadsters@autox.team.net</a><b=
r clear=3D"none">>> <br clear=3D"none">>> Donate: <a shape=3D"re=
ct" href=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.te=
am.net/donate.html</a><br clear=3D"none">>> Archive: <a shape=3D"rect"=
href=3D"http://www.team.net/pipermail/datsun-roadsters"; target=3D"_blank">h=
ttp://www.team.net/pipermail/datsun-roadsters </a><a shape=3D"rect" href=3D"=
http://autox.team.net/archive"; target=3D"_blank">http://autox.team.net/archi=
ve</a><br clear=3D"none">>> <br clear=3D"none">>> Unsubscribe: <=
a shape=3D"rect" href=3D"http://autox.team.net/mailman/options/datsun-roadst=
ers/patintexas@icloud.com" target=3D"_blank">http://autox.team.net/mailman/o=
ptions/datsun-roadsters/patintexas@icloud.com</a><br clear=3D"none">>>=
<br clear=3D"none">>> <br clear=3D"none">> <br clear=3D"none"><br c=
lear=3D"none">________________________________________<br clear=3D"none"><br=
clear=3D"none"><a shape=3D"rect" ymailto=3D"mailto:datsun-roadsters@autox.t=
eam.net" href=3D"mailto:datsun-roadsters@autox.team.net";>datsun-roadsters@au=
tox.team.net</a><br clear=3D"none"><br clear=3D"none">Donate: <a shape=3D"re=
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<div><SPL310 Fuel Gage.pdf></div></div></div></body></html>=
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