Screenwash and rear wiper stopped

[Numero9]

Rear wiper and screenwash (both front and rear) has stopped working. The front wipers work as normal and when I pull on the stalk the front wipers move as they should but no motor sound.

Reading various forums/posts my initial plan is to check the fuse and see if any are blown. There are some posts about checking the relays behind the cubby panel but I'm not sure how to check them with a multimeter? Also I don't know what sound people claim to hear when checking the function. Are they readily available from dealer?

I have a spare read wiper motor and screenwash pumps in case it is any of them.

[Numero9]

Just to update change in fuse and it's all working again. I do now have a leak in the hose that runs in the car to the rear. Found the leak tried a 4mm connector and still leaks. All dealers now closed if anybody has any suggestions on joining the corrugated pipe together?