There's another thread on this with lots of info. I've checked everything and still get erratic readings. The signal level, especially at smaller fuel loads, is quite small, so any corrosion or other impedance screws up the reading. I've given up, take the readings when they're there (I never get a positive but inaccurate reading -- it's either correct or zero) and never take off without visual confirmation of fuel in the tanks.
Ernie
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