Dynamo fuse?

[Graham Honnor]

Finally found some time to have a look at the car, albeit I have to leave for work in 1/2 hour.
I've renewed the fuse and checked the dynamo by removing both D and F wires, connected a 12v bulb between live on the battery and each terminal in turn on the dynamo. Each time the bulb lights up.
I then reconnected the D wire to the dynamo and connected the bulb between the green wire 
and earth but it won't light in either the summer or winter setting even when revved quite hard.
I then reconnected the green (F) wire back back on the dynamo and turned my attention to
the cut out.
Having checked both fuses were still okay, I revved the engine in summer and winter mode but 
the cut-out contacts aren't closing.
Will it be safe to give them a helping hand and close them manually to see if this produces some
charge on the ammeter please?
At the moment I'm unsure why they're not closing, and why the green wire isn't lighting the bulb
when tested, and if they're linked.
My electrical knowledge is considerably limited.
Any help would be very much appreciated.
Thank you
Graham.