Probably someone will chime in here and say use an ohmmeter. That's not going to tell you much if anything.
-Hal
I'd agree with the comment of the ohmmeter not being of any real help, it is after all not a loudspeaker being tested here, where you get the small click in the voice coil when you apply an ohmmeter to it's input.
Microphones always have the problem of bad connections caused by rough handling and the like.
When I was playing in a band, I was forever repairing mike and guitar leads.
