Finished my circuit for intermittant wash wipe, Simply it takes the output from the intermitant speed selector and based on that triggers a Single Wipe, The speed selector varies the time between each wipe.
Heres the circuit
Whilst this will work the resistor values in the stalk are far to low and close together to make any real difference to the time between wipes, Currently it can be varied between 1 to 1.5 second pulse's
If we had an output of up to 100k then our range would between 1 to 30 seconds.
My next step is see how i can change the resistors in the stalk, failing that i'll have to do it via a Microprocessor instead but that'll push the cost right up.
I'll update this thread when i've got a stalk apart.