Join Date: Jun 2006
Location: Eastern ON Canada
Car: 07 OBW 2.5i D-4AT
Feedback Score: 5 reviews
Some wiper/washer switches are "pull back for washer" and others have a button on the end of the stalk. I just want to first confirm that your's is the pull back type and not the one with the button, right?
Are the contacts on the motor, and in the harness connector that attaches to the motor, clean? Corrosion/dirt can prevent a good contact when the connector is attached to the motor.
Do the wipers work? If the wiring diagram is the one for your car, then if the wipers work, the fuse is good. And, if the fuse is good, then there should be 12 V at pin 2 (YB) of the washer motor harness connector (measured between pin 2 and a good ground) when the ignition switch is at On. This is the next thing to check.
Pin 1 of the harness connector at the washer motor is connected terminal E at the washer switch. When the switch is pulled back, it connects the E and EW terminals. Although it's off the bottom of the diagram as posted, I believe the EW terminal is connected to a ground. So, with the washer motor connector removed from the motor, measure the resistance (Ohms) between pin 1 (LgR) of the harness connector and ground. (To be safe, first make sure the ignition switch is turned Off.) The resistance should be fairly high with the switch in the normal, off, position, but drop down close to zero (perhaps a few Ohms) when the switch is pulled back.
If the resistance remains high when the switch is pulled back, then the switch could be bad (dirty contacts is possible) or there's a problem in the wiring from the washer motor to the switch, or from the switch to ground.
If the resistance does drop to zero with the switch pulled back, the motor could still be at fault. It might work when 12 V is applied directly to it's terminals, but when connected via the connector, the voltage could be somewhat lower and the motor, due to age, might not be able to start up.
Does your washer reservoir also have a rear washer pump? Is the connector the same? Does the rear washer motor work? If so, you could put the front washer connector on the rear washer motor, and pull the front washer lever back. This is another way to see if the power and connections through the front washer switch are good -- if they are, the rear washer motor will run.
Do the tests, see what happens, and let us know.