Wash Wiper Parking Problem

Hi all - I have a problem with my wipers. Not the common intermittent problem or the parking problem when normal wiping, this all works fine.

The problem is, the wipers dont 'park' when using the windscreen washer only. Anybody come across this before? Ive changed relay 19, no different. Any advice is appreciated, MOT in 2 days!

Thanks in advance.

Bad connection on the wiper motor.
Bad Parking switch in the motor itself or dirty contacts on them.

Thanks for the reply - turns out the common 12v feed for the parking position was only giving 7v. Chased a few wires back to the fuse board and indeed, turned out to be a poor connection.

All working correctly now and much stronger than it was. Thanks again.