Wiper Fault

Hi all looking for some advice. My wipers on my 2003 R53 Cooper S don’t work on intermittent speed, they just go constantly same speed on position 1 & 2 and faster on position 3. They then randomly stop but if you flick the stalk again they go again for a while then stop. When they stop it can be on random positions even when you turn them off they don’t always go to the park position. I have changed the stalk and took a better earth to the motor. Could it be the relays or is it a new wiper motor time?

Sounds like the motor