Last night I had the windscreen wipers on and at some point, whilst on 'intermittent' position, they started wiping at normal speed.
They wouldn't stop, wiping at normal speed in all positions except in double speed position, they ran at double speed.
After a few minutes they turned back to normal and stopped. After that it was all working as usual.
Does that sound like a 'park position sensor' at fault? I've heard of them but never seen one. Is it usually inside the motor and can it be replaced or adjusted?