Ron:
Take the wire to the hot side of the fuel sender (Green-Black)
and ground it. After about 30 seconds, check the fuel gauge. It should
read full. Let the hot side of the fuel sender float. After 30 seconds
the gauge should read empty.
The gauge will not respond instantly as it a thermal gauge (uses
a hot wire to determine the reading). This is done so that the gauge
doesn't bounce around every time the fuel sloshes from side to side in
the tank.
If the gauge still doesn't respond, the gauge may be bad. Check
the temperature gauge; is it working correctly? If not, it may be your
instrument voltage regulator and the fuel gauge may be fine. You will
need to pull the gauge and check it with an ohm meter.
Vance
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