I recently picked up a stepper motor with 9 wires, but can't find any
documentation about a 9-wire stepper motor!  An attack with the ohm-meter
revealed 3 wires (a,b,c - see below) with a 2.00 ohm resistance between each
pair of wires, and the rest have either infinite resistance or 5-10 Mohms
resistance.  Any ideas what's going on here or how to control it?

a -> b = 2.00 ohms
a -> c = 2.00 ohms
b -> c = 2.00 ohms

If it helps, the wire colors are:

a: brown
b: yellow
c: orange

and the rest are black, red, purple, blue, white, and green.

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