"HarryHydro" I tried to fix this mic, but
first I had to figure how to take it
apart. I couldn't find any hits with google, so here's we go!

There are three plastic latches inside.
One is at the top, and two on either side, about an inch and a quarter
from the opening of the mike plug. You may be able to poke a flat-blade
screwdriver here, but it's a very tight case. I look now how I
chipped-up the edges and think squeezing the back-half of the case on
both sides, about an inch and a quarter up from the cable may snap it
open. This mic has a bad switch. Easy to fix, but maybe hard to find
the parts. Maybe at Digikey.

I hope someone finds this useful!
Harry

These are only like $36 new.Unless you really feel need to repair this I
would just buy a new one.I could not find a part number for the switch for
this model either.Any luck ? Parts ID at Motorola might be able to help
you.I have not tried them yet.
Wayne