So if you're using a pot as a variable resistor and not a voltage divider, why is the benefit of connecting one wire to lug 1 and the second wire to lugs 2 and 3 instead on lug 2 only and leaving lug 3 floating?
Is it to reduce the chance of noise, or something else?
As far as I'm aware is just done for redundancy. So if, for whatever reason, your wiper fails, there's still a resistance between lug 1 and the lug 2 wire.
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