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Re: [Roadsters] Fuel indication issues

To: RWM <> definitions=2020-05-09_06:2020-05-08, 2020-05-09 signatures=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-2002250000 definitions=main-2005090150
Subject: Re: [Roadsters] Fuel indication issues
From: Pat Horne via Datsun-roadsters <>
Date: Sat, 9 May 2020 12:18:52 -0500
Cc: Datsun List <>
References: <>
Hook everything back up except the sender. Turn on the key & measure 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 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 what yâ??all find & 
Iâ??ll walk you through more diagnostics. 


Pat Horne 
We support Habitat for Humanity

> On May 9, 2020, at 11:02 AM, RWM via Datsun-roadsters 
> <> wrote:

This has been discussed before, but here are the indications:

Fuel gauge does not budge off empty 

Fuel sender resistance shows 34 ohms as installed, with tank less than half full

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 wiper off the rheostat windings

Fuel harness is delivering 7.6 volts, measured with the yellow and black 
connectors removed

Shorting the fuel harness to itself (yellow to black) does not change the fuel 
gauge indication

Ammeter works, temperature gauge works

Ideas? Dash harness connector?


- Bob Mann, '68 2000 Solex







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