Dick,

Sounds like the yeast has eaten all the sugar. If it were my wine,
I'd use a wine thief and sample the wine both for alcohol and taste.
I'd use a vinometer to verify the alcohol level. If you're satisfied
with both - bottle it. Wait or not and enjoy it.

The majority of the fermentation takes place in the primary
fermentation stage within the first 3 - 10 days. The Secondary
fermentation stage is more of a finishing stage - there are many
"chemical" (all natural) reactions of esters and aldehyes, and much
more going on that give bloom to the flavor, bouquet and character of
the wine. More occurs in the bottle while aging.

The newer rocket style airlocks are not as sensitive to the pressure
as the old double chamber level airlocks are. Also, the newer ones
have be kept with adequate water levels in them. If levels are too
low, they are less protective and may indicate that the wine is
finished fermenting prematurely. They also are subject to the
positive pressure of just pushing them into the bung.