Can you trace where any of the wires come from
This would be  a great help in trying to understand the circuit
or is it all fried ?

On a side note Maxon make great motors,
with just the coil (in tubular form) and the shaft as
the armature

         -------------
                      1
 ----------------------CCC--------------
 ----------------------CCC--------------
                      I
         -------------
             coil        CCC = commutator


Open circuit you have only the bearing resistance
(can't count the poles on these babys)

The field(stationary) magnet is inside the tubular coil.
More like a speaker than a motor.

They cost a lot but are among the best motors you can get.

PS: if you do open it up, the brushes are a pain to reposition,
the commutator has a VERY small diameter, not much more than the shaft

--
Peter Cousens
email: p.cousens@cwcom.net  or  p.cousens@virgin.net
smail: 48, Yarmouth Cresent, London, N179PQ, England.