Was driving home today from echuca and was playing around with...the car and twisted the end of the wiper handle/switch/arm thing. i noticed it when i first bought the car but forgot to ask....
Its a twisting knob, with 3 settings, on the end of the wiper handle and it has a little gap next to it that indicates the amount of whatever it is.
I have 2 guesses at what it is:
1. Regulates the amount of water from the washers
2. Sets how far the wipers sit under the bonnet.
Anyone know for sure what it does ?