hi,
Why didnt you tell us that in the first post, we could have saved ourselves some time.
To test a grounding wrist strap requires a
KNOWN good earthing point.
Measuring the value of the resistor [470K thru 1M0] and the continuity of the connecting wire will not proof test the strap.
You need to apply a voltage to the strap and the KNOWN ground.
If I gave some instructions on how to construct a test box, do you have the facilities and expertise to make it.?