Wiper switch wiring

[nzchevy]

I have used search and must have read every post related to this subject but I'm still at a loss!
I had wipers that worked but wouldn't park. I thought this was due to me previously wiring the switch incorrectly. However I have now wired my switch as per the w/s manual and I have nothing.The wiring diagram for the MKIIC shows a Yellow/Green and Brown/Green going from the wiper rheostat to the wiper switch. However on my car the rheostat is wired with Yellow/Green and White/Green. Is there a way of checking the switch? What wires do you need just to get the wipers turning?

Thanks

Roger

[nzchevy]

With a lot of perseverance and a circuit tester I now have the wipers working. They weren't working previously because the rheostat wire on the Fast/Slow switch had become detached. The park mechanism still doesn't work but this is because the park mechanism is broken in the wiper motor. In the five years the car has been sitting in the garage it seems to have been vandalising itself because I'm sure the mechanism worked when I drove the car in. A lot of my problems have been caused by assuming things that were working and O.K five years ago would still be O.K. As far as I am aware there are no other outstanding issues so i shall try to get an MOT this week.

Roger

[Phil Nottingham]

Thanks for the update - leaving cars standing does cause problems though - grease solidifying in the rack and gearbox can result in the motor burning itself out - the switch can also fail through this and it is a special one