motor

hi guys, looking for a bit of help. My veccy b wipers pause, on intermittent, at the top for about 3-4 seconds and then return to parked. On faster settings they work fine. Would this be a relay problem or motor on its way out. any input appreciated

My car is a late Nov 2005 `facelift' Signum 2.2 petrol. Does anyone know the part number for the starter ? What sort of a job is it to replace ? Regards