You'll need to remove the reservoir to get to the pump.Location
The windshield washer fluid pump is located at the left in the direction of travel on the windshield washer fluid reservoir.
Washer fluid supply to the spray nozzles. It is actuated directly by the right wiper switch (S4/4).
On model 451.3 the windshield washer fluid pump is designed as a duo pump. Depending on actuation, the pump's direction of rotation changes and therefore the conveying direction between the front and rear end.