I am not going to fiddle around with this mod as I am happy with the intermittent 8/9 second delay on my '90 745 and it's easy to stop and pull the stick forward to get an extra wipe or continuous slow wipe if you need it ... as I did this morning.
What continues to frustrate me much more is the blocking of the front and back screen/tailgate wash jets that I really needed today. I guess I shall have to clean the pipes out and blast all screen wash from the tank Only did it 5 years ago and it's a pain having to remove the air filter box to gain access.
It also seems to me that modern screen wash anti-freeze develops 'bits.floaters' in it far more readily than of old which I am sure is part of the problem. Bob