Examination
Disconnect the connector from the pump.
Connect a voltmeter to the terminals of the connector. Switch on the ignition and operate the washer switch. Voltmeter should show battery voltage (12 volt), otherwise check the fuse. This check can also be made with a carrier lamp.
Replacement
Disconnect the connector from the pump.
Pull out the pump and tank and close the hole in the tank with your finger
Insert a new pump, some liquid flows out.
Insert the tank and tighten the nut.
Connect hoses.
Connect connector.
If required, pour water into the tank.
Check the function of the washer pump.