[Mgs] Voltmeter bounces when I shut off the engine

[PaulHunt73]

Ordinarily that would only happen once, whereas originally you said it bounces
around for several seconds, and ordinarily with the engine running the same
thing is happening many times a second.  Try stopping the engine by
disconnecting the red Pertronix wire from the unfused ignition supply source
it is normally connected to, and see what that does.  If it doesn't do it then
it almost certainly is the Pertronix, but I can't see it doing any harm to
anything.

PaulH.
  ----- Original Message -----
  My first guess is that the stray voltage has something to  do with the
collapsing magnetic field in the coil feeding voltage back into the ignition
circuit after power is turned off.