Hi Alan

Just about every stepper I've seen has different colour wire combinations, its just about impossible to say how to connect it up. But what I did was measure the resistance between the windings to work out which wires connect to the coils, and then I spun the windmill by hand and measured the output voltages. It took a while, but I found the combination that made the most power.

http://www.thebackshed.com/Windmill/assemblyMini3.asp

Glenn