Pinpoint Test M: The Rear Window Washer Is Always On

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

M1 CHECK THE WIPER/WASHER SWITCH INPUT USING THE REAR WIPER WASH SWITCH (R_WIPE_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 R_WIPE_WASH_SW PID.

Activate and release the rear window wash function on the wiper/washer switch.

Does the PID indicate correctly when the switch is activated and released?

Yes

GO to M2

No	INSTALL a new wiper/washer switch. REFER to: Steering Column Multifunction Switch RH . TEST the system for normal operation. If the concern is still present, INSTALL a new SCCM. REFER to: Steering Column Control Module (SCCM) .

M2 CHECK THE WASHER PUMP RELAY COIL CONTROL CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect Windshield Wiper Motor C1655.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1655-12	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to M5

GO to M3

M3 ISOLATE THE WASHER PUMP RELAY COIL CONTROL CIRCUIT SHORT TO GROUND

Ignition OFF.

Disconnect BJB C1035B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1035B-19	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to M4

No	REPAIR the circuit.

M4 CHECK THE WASHER PUMP RELAY OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect Windshield Washer Pump C137.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C137-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes

GO to M5

GO to M6

M5 CHECK THE WASHER PUMP RELAY OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE IN THE BJB

Ignition OFF.

Disconnect BJB C1035B.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C137-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

No	REFER to the INTRODUCTION to identify the cause of the short to power in the BJB.

M6 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new 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.