Pinpoint Test H : The Windshield Washer Is Inoperative
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- H1 CHECK FOR WASHER PUMP ACTIVATION
- Ignition ON.
- While listening for washer pump activation near the right front of the vehicle, have an assistant activate the windshield washer function.
Does the washer pump activate?
Yes GO to H2. No GO to H6. - H2 CHECK THE AMBIENT AIR TEMPERATURE
- Check the ambient air temperature.
Is the ambient air temperature below freezing?
Yes GO to H3. No GO to H4. - H3 CHECK THE WASHER SOLVENT
- Check the washer solvent and make sure it is of the correct type to use for the temperature conditions present.
Is the correct type of washer solvent present?
Yes GO to H4. No ALLOW the vehicle to warm to room temperature. DRAIN and REFILL the windshield washer reservoir with the correct washer solvent type. INFORM the customer of the correct type of washer solvent to use for the temperature conditions present. - H4 CHECK FOR WASHER SOLVENT TO THE WASHER JETS
- Disconnect the washer hoses from the windshield washer jets and place them in a container to capture fluid.
- Ignition ON.
- Momentarily activate the windshield washer function.
Is washer fluid emitted at the washer hoses?
Yes INSTALL a new washer jet in question. No GO to H5. - H5 CHECK FOR DAMAGED WASHER HOSES AND FITTINGS
- Inspect the washer hoses and fittings for kinks or damage.
Are the washer hoses and fittings OK?
Yes INSTALL a new washer pump. REFER to: Windshield Washer Pump . No REPAIR the washer hoses or fittings as necessary. - H6 CHECK THE WIPER/WASHER SWITCH INPUT USING THE WASHER SWITCH (FRONT) (F_WASH_SW) PID (PARAMETER IDENTIFICATION)
- Ignition ON.
- Using a diagnostic scan tool, view the SCCM Parameter Identifications (PIDs).
- Using a diagnostic scan tool, view the SCCM PID F_WASH_SW.
- Activate and release the wash function on the wiper/washer switch.
Does the PID indicate correctly when the switch is activated?
Yes GO to H7. No INSTALL a new wiper/washer switch. REFER to: STEERING COLUMN MULTIFUNCTION SWITCH LH . TEST the system for normal operation. If the concern is still present, GO to H12. - H7 CHECK FOR VOLTAGE TO THE WASHER PUMPNOTE: This pinpoint test step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.
- Ignition OFF.
- Disconnect Washer Pump C137 .
- Connect:
Positive Lead Measurement / Action Negative Lead C137-2 Ground
- Ignition ON.
- Use the wiper/washer switch to activate the windshield washer function.
Does the test lamp illuminate when the washer is activated?
Yes GO to H8. No GO to H9. - H8 CHECK THE WASHER PUMP GROUND CIRCUIT FOR AN OPENNOTE: This pinpoint test step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.
- Ignition ON.
- Use the wiper/washer switch to activate the windshield washer function.
Does the test lamp illuminate when the washer is activated?
Yes INSTALL a new washer pump. REFER to: Windshield Washer Pump . No REPAIR the circuit. - H9 CHECK THE WASHER PUMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect Windshield Wiper Motor C125 .
- Measure:
Positive Lead Measurement / Action Negative Lead C125-7 Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to H10. No REPAIR the circuit. - H10 CHECK THE WASHER PUMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
Is the resistance less than 3 ohms?
Yes GO to H11. No REPAIR the circuit. - H11 CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION
- Disconnect and inspect the windshield wiper motor connector.
- Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the windshield wiper motor connector. Make sure it seats and latches correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new windshield wiper motor. REFER to: Windshield Wiper Motor . No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues. - H12 CHECK FOR CORRECT SCCM (STEERING COLUMN CONTROL MODULE) OPERATION
- Disconnect and inspect all the SCCM connectors.
- Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the SCCM connectors. Make sure it seats and latches correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new SCCM. REFER to: Steering Column Control Module (SCCM) . No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.