Pinpoint Test K : The Rear Window Wiper Stays On Continuously
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.
- K1 CHECK THE REAR WINDOW WIPER/WASHER SWITCH INPUT PARAMETER IDENTIFICATIONS (PIDS)
- Ignition ON.
- Using a diagnostic scan tool, view the SCCM Parameter Identifications (PIDs).
- Using a diagnostic scan tool, view the following SCCM Parameter Identifications (PIDs).
- Rear Wiper Off Switch (R_WIPE_OFF_SW)
- Rear Wiper Delay 1 (R_WIPE_DEL1)
- Rear Wiper Delay 2 (R_WIPE_DEL2)
- Place the wiper/washer switch to the rear INT 1 and rear INT 2 positions, and then off.
Do the Parameter Identifications (PIDs) indicate correctly for the switch positions?
Yes GO to K2. 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 K5. - K2 CHECK THE WINDSHIELD WIPER MOTOR
- Ignition OFF.
- Disconnect Windshield Wiper Motor C125 .
- Ignition ON.
Does the rear window wiper motor continue to operate?
Yes GO to K3. No GO to K4. - K3 CHECK THE WINDSHIELD REAR WIPER CONTROL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect Rear Window Wiper Motor C476 .
- Measure:
Positive Lead Measurement / Action Negative Lead C476-2 Ground
Is the resistance greater than 10, 000 ohms?
Yes INSTALL a new rear window wiper motor. REFER to: Rear Window Wiper Motor . No REPAIR the circuit. - K4 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. - K5 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.