Most washer bottles have the pump assembly mounted directly in the bottom of the bottle and after several years the seal on the shaft between the pump impeller and the motor can become worn and hard and start to leak. Also the tube on the outlet of the pump could be loose or has become disconnected allowing any fluid to run out. To check, remove washer bottle from vehicle (you may have to remove other components to access the attaching bolts) and check security of outlet tube. If split or loose cut a bit off the end and re attch to outlet. If the seal on the pump shaft has been leaking and allowing water into the motor, there will be some corrosion on the inside and minimal lubrication on the bearings. You could try dismantling the pump and applying some water resistant grease to the shaft seal and bearings, but it would only be a temporary fix. Best option for this fault would be to replace the pump motor assembly.
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