| Pat,
With ignition switch in running position
Yellow wire to chassis is 7.6 volts, same as to black wire
Yellow wire to ground, no gauge deflection 
Thanks
- Bob
> On May 9, 2020, at 13:19, Pat Horne <patintexas@icloud.com> wrote:
> 
> 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. 
> 
> Peace,
> Pat
> 
> 
> Pat Horne 
> We support Habitat for Humanity
> 
> 
>> On May 9, 2020, at 11:02 AM, RWM via Datsun-roadsters 
>> <datsun-roadsters@autox.team.net> 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?
> 
> Thanks.
> 
> - Bob Mann, '68 2000 Solex
> 
> 
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