My left tank gauge (early RV-6 with sensor, gauge, and wiring as in the drawing Scott posted above) is reading intermittently. It provides either a plausibly correct reading or empty. The wiring at the gauge appears solid and wiggling wires there doesn’t cause or resolve the problem.
I suspect either an intermittent connection (power or ground) at the level sensor, or a sticky float mechanism. I suspect the latter only because occasionally rocking the wings on the ground will resolve the non-reading gauge (not sure how the subsequent failure, instantly falling to zero happens in that case however).
Looking for anyone with similar experiences or suggestions on how to troubleshoot further (ideally postponing opening the tank access panel to a last resort).
Thanks,
Peter