V8V wipers with a mind of their own!

[Cipo]

I finally got to the route cause of my flat battery a while ago as I found my wipers on without any keys in the ignition.

Put the car in for the 5th year service last month and the dealer put in some new wiper relays. Problem sorted? No....

Well, today, after the first time washing since the service the same thing happened, keys in my pocket and the wipers came on, washer stalk in the off position.

Anyone on here had this? The dealer has not come across this one.

Cheers,
Ray