P reg 300 TDI

Got another Disco in good nick but there are a few problems one is the windscreen wiper switch, It works ok in slow and fast speed but doesn't work in any intermittent speed or when you pull to use the washers the washers work ok but no wipe. Is there a ECU to control the wipers or is it in the motor or the stalk. many thanks.

Yes it's called a Multi Function Unit.

doe's any one know were that is I've looked in my copy of D1 download and ir dont have any wireing diagrams.

The MFU is plugged into the rear of the fuse board, it has its own function dianostic test, how to do that has been posted before a few times so Google or search this Forum for info on this item.