Bill,
If what you say in your last post is in fact the case you have (been supplied ) the wrong part. ie If you asked for a pot that is what they would have sent you.
It just won't work properly at all with a 16 ohm pot in there.
Please contact Parts Express or look at their online catalogue.Someone might have the part no, I don't have time to look it up right now The correct L pads are only a few dollars.
As Lord Zilch Von Zilchen-Curvemeister says with shaft facing you connect one probe of the multimeter to the far left tab and measure the Resistance to the centre tab. At full clockwise rotation it should read close to zero ohms. Start turning anti clockwise and it will increase slowly to about 16 ohms. (8 ohms with an 8 ohm L pad)
Now connect the probe to the centre tab and the other probe to the far right tab.
At full clockwise postion it will appear open ciruit (infinite ohms). Turn slowly anticlockwise and it will measure a high resistance (35-60 ohms depending on 8 or 16 ohm L pad) and start to decrease and will be zero ohms at full anitclockwise rotation.
As a further test, connect the probe to the fat left tab and the other probe to the far right tab. At full clockwise rotation it will measure infinite ohms. Then turn slowly anti clockwise and it will measure a high resistance (over 30 ohms) and will decrease slowly to about 16 ohms ( 8 ohms with an 8 ohm L pad).
(The L pad shouuld not be connected to the crossover during the above procedure)
If you are unable to get the above range of measurements then without doubt you have the wrong part.
Ian