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Here are the tests:

- empty tank right side up - wires removed from motor - continuity on wires
- empty tank upside down - wires removed from motor - no continuity
- full tank right side up - wires hooked up to motor - alarm sounds
- full tank right side up - one wire removed from motor - no alarm

It appears that the switch does works - what I'm wondering - is it possible that the float is not floating? Otherwise - am I missing something?

Thanks,

Wayne