While the van was in the garage for its MOT, Ian, the mechanic, said that he had seen the same intermittent behaviour from the wipers. I was glad. So often intermittent faults "go away" when the vehicle is in to get repaired, and come back again when it comes out.
So a new motor and washer were fitted.
I went to pick up the van at the garage but Ian explained apologetically that he had managed to crack my windscreen. It was a crack about a foot long. He immediately said that he would pay the excess for the insurance repair.
I informed my insurance company who told me to book it in with Autoglass. Four days later, they came to the garage and replaced it.
Wipers and washers now working fine. I have removed the fuse from the solar controller so the batteries will get a boost every time the sun shines - not often this time of the year.
