Midget Wiper motor: 2speed ?

[Eric Bartels <bartels@maths.ox.ac.uk>]

Hi out there,

thanks a lot to all who replied to my last question
about anti roll bars.

here's my next problem: my Midget has a wiper switch with
3 positions: Off-ON and ? I have no manual for the car 
and the Haynes workshop manual doesn't mention a two speed
wiper. So is it a two speed wiper and the high speed setting doesn't work
in my car ?

cheers, Eric
Oxford, UK