The first step in repairing the pump is to turn off the negative battery cable. If you need to, carefully take off part of the bumper fascia, put a drain bucket below the reservoir and drain out any washer fluid that leaks out. Take hold of the pump, twist it and pull it through the grommet, making certain you do not accidentally hurt the reservoir flask. Take out the rubber grommet from the reservoir and throw it away. After removing the old washer, put it in place back the same way, add a new grommet and make sure the reservoir is full of washer solvent.