What range for the Ohms did you set the meter? I does seem you had it in the 1k range judging by your reading of 320 Ohms (0.32 kOhms).
So you hook up the cap, it shows 'some numbers' (what were they?) and then very quickly should go to a new number...possibly OL.
What is happening is that the meter is charging up the cap and while charging it up, it will show some numbers...likely small numbers like 10-20-40 ohms or something because current is flowing and the cap is charging and so that looks like a short in resistance (0 Ohms, technically). When the cap is done charging, it should be an open circuit or open line (OL). No current flows so looks like a very large resistance (infinite).
If it is sitting on 320 Ohms (0.32 kOhms) after all that, then I think the cap is bad. If all you ever can see is something like 0.32 kOhms, then I think a new cap is in your future.