Originally Posted by ETNiESdublin
OK so I bought a Wiper stalk from eBay with the intermittent wiper speed change, fitted it, works fine apart from the intermittent part (why I bought it in the first place)
It should be an easy swap (as it was on my 2001 car although you have a Euro model, obviously.) The "intermittent function" is controlled by the wiper stalk innards so a relay is not required nor are any wiring modifications. It's a straight "plug and play" replacement.
Was it a genuine Ford part? Ebay parts can be of questionable quality sometimes.