Merc Atego 815 windscreen wipers and washers stopped workin!

As above its a 2003 7.5 tonner and its up for psv on thursday!

Problem is that; both wipers and washers dont work.

Can hear the motor going when depress stalk for washers.

There was a problem that the wipers would only work on the second setting but now there is nothing at all??

All the fuses look to be “automatic”. What else could it be? Stalk? Switch relay? How should i go about testing for these?

Im thinkin its the switch on the stalk because of the earlier problem of only working on the 2nd setting and indicators still work.

Any help is much appreciated as have psv in next few days

Thanks!