How to take it to pieces the hard way:
First you have to remove the spring collar in the middle of the air bag feed spool.
This seems to be an interlock for the spool (yep, it's about 2 meters of ribbon cable, I had it all out in a heap) so without it the thing can turn so, first up, push it and turn the spool CLOCKWISE and count the number of turns until it goes tight (I think it's about 3 and a bit but I could be wrong, I wasn't paying much attention). This is where the ribbon is fully wound up and gives you a reference for when you reassemble (that's if you don't give up and stamp on the thing.) Now you can carefully (that's the last time I'm going to use that word, just take it as read everything you do here has to be done that way) prise out the collar:
Next, two screws:
and a few clips, so lots of prizing with a blunt implement.
Now, hopefully, you have the top off:
Two connectors and the circuit board is held in with a few clips. Now that's out the way you'll be able to see the wipers:
and the tracks on the back of the board:
The indicators are the two in the middle, the others are flash and dip/main beam.
Next, to remove the stalk you need to prize it top & bottom thus:
In the bottom of the stalk is a little knob with a spring behind it, which is what holds the stalk in place while it's in action:
This bears on some sort of ramp inside:
On the front is a little rocker:
When the stick is turned, this little jobbie is pushed by the knob and tips one way or t'other and is pushed back on by lugs on the bottom of the spool:
which in turn pushes the knob and returns the stick.
So, what's wrong with it? Buggered if I know!! I couldn't make it go from indicating right straight to left and I was sodding about for ages. Should the rocker be sitting at an angle? Should the ramp look like that? Has the little spring behind the knob collapsed? I don't know. The only thing I could think to do is stretch the spring, BM (before mangling) it was 20mm, AM 25mm, and it does feel much more positive. Trouble is, there's no way it's going back on my car!
I did try taking the stalk out without dismantling it, I thought this could even be done in situ, unfortunately the little wires are too short, they're hooked round a bit of plastic and I can't figure out how to release them from outside. I also tried dismantling the stick but removing the foglight stage rather requires the wires to be disconnected from the other end. Dammit, they thought of everything.
The other problem I had was iffy contacts, I tried spraying contact cleaner in while it was in the car but it doesn't look like any of it got on them, they still had grease all over them. One thing you could try is drilling a small hole in the top so you can spray down behind the circuit board:
You never know...
Ah well, rather pointless but it was more interesting than watching the crap they put on telly here
just remember your friends on here that's all 
)