Windscreen wiper park........

Help, I've changed the relay behind the clocks on my 2004 TD5 90 and it's not cured the wipers not parking, as I'd hoped.. If I physically push the wiper arms they will park... But alas, not on their own...
What's the solution ? Your knowledge and expertise and possibly your own experience is required...

theres a park switch on the wiper motor its part of the connector the wiring runs too

As above.
Here's a link to a video on it. The video is of a 200 TDI but basically the same as on your TD5 but check part number for your vehicle.