DIAGNOSIS AND TESTINGww2.justanswer.com/...04...wipers_and_washer_tests.pdf · 23.04.2012 · The...

501-16-1 501-16-1Wipers and Washers

DIAGNOSIS AND TESTING

High-Speed Windshield WipersWipers and WashersRefer to Wiring Diagrams Cell 81, Wipers and When the multi-function switch is set to theWashers for schematic and connector information. HIGH-speed position, it supplies ground to theRefer to Wiring Diagrams Cell 82, Liftgate high/low-speed relay coil and the run/park relayWiper/Washer for schematic and connector coil, which causes the windshield wiper motor toinformation. operate at high speed. During HIGH-speed operation

only, both the high/low-speed relay coil ground andSpecial Tool(s)

the run/park relay coil ground are controlled directly

by the multi-function switch. This differs from73III Automotive Meter105-R0057 or equivalent LOW-speed or INTERMITTENT operation when

the run/park relay coil is controlled by the

microprocessor. When the switch is placed in the

OFF position, the motor continues to operate until

the motor returns to the PARK position and the

internal Hall-effect sensor senses the motor magnet.

The output to the run/park relay deactivates theFlex Probe Kit105-R025B or equivalent relay and disconnects the voltage to the motor.

Since the high/low relay coil and the run/park relay

coil are both controlled by a hard-wired circuit to

the multi-function switch, the windshield wipers will

still operate in high-speed mode if the internal

windshield wiper module fails, but will not

automatically park when the multi-function switch isPrinciples of Operation

turned to the OFF position.The wiper motors receive inputs from the following:

Low-Speed Windshield Wipers• multi-function switch

When the multi-function switch is set to the• ABS control module vehicle speed signal (VSS)

LOW-speed position, it supplies ground to the• ignition switch internal windshield wiper motor module low-speed

input and the windshield wiper motor operates at• power distribution junction box (PDJB)low speed. During LOW-speed operation, the

The following components are integrated in theinternal run/park relay is activated by the

wiper motors:microprocessor and supplies 12 volts to the

low-speed brush of the windshield wiper motor. The• windshield wiper motor modulerun/park relay coil ground is controlled by the• High/Low speed relayinternal windshield wiper motor module based on

• run/park sense (Hall effect) inputs received from the multi-function switch.

• washer pump relay When the switch is placed in the OFF position, the

motor continues to operate until the motor returns to

the PARK position and the internal Hall-effect

sensor senses the motor magnet. The output to the

run/park relay deactivates the relay and disconnects

the voltage to the motor.

Copyright 2003, Ford Motor CompanyLast updated: 2/9/2007 2004 Excursion, F-Super Duty 250-550, 12/2004


DIAGNOSIS AND TESTING (Continued)

Washer SystemSince the run/park relay is controlled by the internal

windshield wiper motor microprocessor, the wipers When windshield wash is selected on thewill only operate in high-speed mode if the internal multi-function switch, the windshield wiper motorwindshield wiper motor module fails, and will not module activates its integral washer relay, whichautomatically park when the multi-function switch sends voltage to the washer pump to direct fluid tois turned to the OFF position. This is due to the the windshield.run/park and high/low relay coils being directly

Washer System — Excursionhard-wired to the switch in high speed. The diode

prevents current flow through the high/low relay The front and rear washer system share the samecoil so the relay remains in the normally closed washer reservoir and washer pump. The front andLOW-speed position. rear wiper motor modules each contain an integral

washer relay that supplies a ground path for theIntermittent-Speed Windshield Wipers

washer pump whenever they are inactive. WhenWhen the multi-function switch is set to the windshield wash is selected on the multi-functionINTERMITTENT position(s), it supplies ground to switch, the windshield wiper motor module activatesthe windshield wiper motor module inputs and the its integral washer relay, which sends voltage to thewindshield wiper motor operates in intermittent washer pump to direct fluid to the windshield.mode. During INTERMITTENT operation, the When rear wash is selected on the multi-functionwindshield wiper motor activates the run/park relay switch, the rear wiper motor module activates itscoil which sends voltage through the high/low relay. integral washer relay to send voltage to the washerThe high/low relay remains deactivated, supplying pump to direct fluid to the rear window.the voltage to the low-speed brush of the windshield

Software Safe Modewiper motor. The windshield motor continues to

operate until the internal Hall-effect sensor senses The windshield wiper motor defaults to softwarethe magnet (PARK position) and deactivates the safe mode when the run/park sensor does not senserun/park relay, which disconnects voltage from the the Hall-effect magnet inside the wiper motor. Thiswiper motor. The windshield wipers remain parked can be caused by an obstruction of the windshielduntil the windshield wiper motor module completes wipers, a binding linkage or loss of the Hall sensora time-out and then repeats the intermittent signal. The motor continues to operate in awindshield wiper cycle. high/low-speed condition, and when turned off, the

wipers immediately park on the windshield. IfIntermittent Rear Window Wiper System —

necessary, the wipers can be turned on and off untilExcursionthey return to the PARK position.

When the multi-function switch is set to the rear

INTERMITTENT position(s), it supplies ground to

the rear window wiper motor module input and the

wiper operates in intermittent mode. During

INTERMITTENT operation, the rear wiper motor

momentarily activates the rear window wiper relay

(internal), which sends voltage to the motor. Once

the rear window wiper motor is activated, the

internal run/park switch connects voltage to the

motor, keeping it operating. When the rear window

wiper motor returns to the PARK position, the

run/park switch disconnects voltage internally from

the wiper motor input, reconnecting it to the rear

window wiper motor module output. The rear

window wiper remains parked until the rear window

wiper motor module completes a time-out and then

repeats the cycle.

2004 Excursion, F-Super Duty 250-550, 12/2004



Windshield Wiper Circuit Function Table

Multi-FunctionSwitch Circuit 589 Circuit 61 Circuit 56 Circuit 58

Position (OG) (YE/RD) (DB/OG) (WH) Circuit 63 (RD)

OFF OPEN OPEN OPEN OPEN OPEN

INT 1 OPEN OPEN OPEN OPEN GROUND

INT 2 OPEN OPEN OPEN GROUND GROUND

INT 3 OPEN OPEN OPEN GROUND OPEN

INT 4 OPEN OPEN GROUND GROUND OPEN

INT 5 OPEN OPEN GROUND OPEN OPEN

LOW OPEN OPEN GROUND OPEN GROUND

HIGH OPEN GROUND GROUND OPEN GROUND

WASH GROUND OPEN/GROUND OPEN/GROUND OPEN/GROUND OPEN/GROUND

Rear Wiper Circuit Function Table (Excursion Visual Inspection Chartonly)

Mechanical ElectricalMulti-

• Windshield washer • CJB fuse: Function

hoses — 21 (25A) (ExcursionSwitch Circuit 993 Circuit 1300

• Wiper linkage only)Position (BN/WH) (VT)

• Multi-function switch — 33 (15A)OFF OPEN OPEN — 48 (10A) (Excursion

only)INT 1 OPEN GROUND— 106 (30A)

INT 2 GROUND GROUND • Circuitry• Windshield wiper motorWASH GROUND OPEN

3. If an obvious cause for an observed or reportedInspection and Verification

concern is found, correct the cause (if possible)1. Verify the customer concern by operating the before proceeding to the Symptom Chart.

system.

2. Visually inspect the following for obvious signs

of mechanical or electrical damage.

Symptom Chart

Symptom Chart

Condition Possible Sources Action

• The windshield wipers are • Multi-function switch • GO to Pinpoint Test A.inoperative • Circuitry

• Ignition switch• Windshield wiper motor

• The rear window wiper is • Multi-function switch • GO to Pinpoint Test B.inoperative (Excursion only) • Circuitry

• Ignition switch• Rear window wiper motor

• The windshield wipers stay • Windshield wiper motor • GO to Pinpoint Test C.on continuously • Multi-function switch

• Circuitry

• The rear window wiper stays • Rear window wiper motor • GO to Pinpoint Test D.on continuously (Excursion • Multi-function switchonly) • Circuitry




Symptom Chart (Continued)

Condition Possible Sources Action

• The high/low windshield • Multi-function switch • GO to Pinpoint Test E.wiper speeds do not operate • Circuitrycorrectly • Windshield wiper motor

• The low rear window wiper • Multi-function switch • GO to Pinpoint Test F.speed does not operate • Circuitrycorrectly (Excursion only) • Rear window wiper motor

• The intermittent windshield • Multi-function switch • GO to Pinpoint Test G.wiper speed does not operate • Circuitrycorrectly • Windshield wiper motor

• The intermittent rear window • Multi-function switch • GO to Pinpoint Test H.wiper speed does not operate • Circuitrycorrectly (Excursion only) • Rear window wiper motor

• The windshield wipers do not • Multi-function switch • GO to Pinpoint Test I.operate correctly in the MIST • Circuitryposition • Washer pump

• Windshield wiper motor

• The rear window wiper wash • Multi-function switch • GO to Pinpoint Test J.and wipe function does not • Circuitryoperate • Washer pump

• Rear window wiper motor

• The washer pump is • Washer pump • GO to Pinpoint Test K.inoperative • Multi-function switch

• Windshield wiper motor• Rear window wiper motor• Circuitry

• The windshield wiper speed • Windshield wiper motor • GO to Pinpoint Test L.dependent interval mode does • Circuitrynot operate correctly • ABS module

• The wipers will not park at • Windshield wiper motor • REFER to Wiper Blade andcorrect position • Rear window wiper motor Pivot Arm Adjustment in this

• Pivot arm adjustment section.• Linkage

Pinpoint Tests

PINPOINT TEST A: THE WINDSHIELD WIPERS ARE INOPERATIVE

Test Step Result / Action to Take

A1 CHECK CIRCUITS 65 (DG) AND 1002 (BK/PK) FOR VOLTAGE

• Key in OFF position.• Disconnect: Windshield Wiper Motor C125.• Key in ON position.

(Continued)




PINPOINT TEST A: THE WINDSHIELD WIPERS ARE INOPERATIVE (Continued)


A1 CHECK CIRCUITS 65 (DG) AND 1002 (BK/PK) FOR VOLTAGE(Continued)

• Measure the voltage between windshield wiper C125 pin 5,circuit 65 (DG), harness side and ground; and betweenwindshield wiper motor C125 pin 8, circuit 1002 (BK/PK),harness side and ground.

YesGO to A2.

NoVERIFY CJB fuses 33 (15A) and 106(30A) are OK, If OK, REPAIR the circuit(s)in question. TEST the system for normal

• Are the voltages greater than 10 volts? operation.

A2 CHECK CIRCUITS 57 (BK) AND 676 (PK/OG) FOR OPENS

• Key in OFF position.• Measure the resistance between windshield wiper C125 pin 6,

circuit 57 (BK), harness side and ground; and betweenwindshield wiper motor C125 pin 3, circuit 676 (PK/OG), harnessside and ground.

YesGO to A3.

NoREPAIR the circuit(s) in question. TEST

• Are the resistances less than 5 ohms? the system for normal operation.

A3 CHECK THE MULTI-FUNCTION SWITCH

• Disconnect: Multi-function Switch C202b. Yes• Carry out the multi-function switch component test. Refer to GO to A4.

Wiring Diagrams Cell 149 for component testing. No• Did the multi-function switch pass the component test? INSTALL a new multi-function switch.

REFER to Section 211-05.

(Continued)




PINPOINT TEST A: THE WINDSHIELD WIPERS ARE INOPERATIVE (Continued)


A4 CHECK CIRCUIT 57 (BK) FOR OPEN

• Measure the resistance between C202b pin 6, circuit 57 (BK),harness side and ground.

YesGO to A5.

NoREPAIR the circuit. TEST the system for

• Is the resistance less than 5 ohms? normal operation.

A5 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD), AND 63(RD) FOR OPENS

• Using the following table, measure the resistance between themulti-function switch C202b harness side and the windshieldwiper motor C125 harness side:

Multi-function Switch C202b Windshield Wiper Motor C125

pin 2, circuit 56 (DB/OG) pin 10, circuit 56 (DB/OG)

pin 3, circuit 58 (WH) pin 11, circuit 58 (WH)

pin 4, circuit 61 (YE/RD) pin 1, circuit 61 (YE/RD)

pin 1, circuit 63 (RD) pin 9, circuit 63 (RD)

YesGO to A6.


• Is the resistance less than 5 ohms? the system for normal operation.

A6 CHECK FOR CORRECT WIPER MOTOR OPERATION

• Disconnect all wiper motor connectors. Yes• Check for: INSTALL a new windshield wiper motor.

— corrosion. REFER to Windshield Wiper Motor in this— pushed-out pins. section.

• Connect all wiper motor connectors and make sure they seat Nocorrectly. The system is operating correctly at this

• Operate the system and verify the concern is still present. time. Concern may have been caused by• Is the concern still present? a loose or corroded connector. TEST the

system for normal operation.




PINPOINT TEST B: THE REAR WIPER IS INOPERATIVE (EXCURSION ONLY)


B1 CHECK CIRCUITS 297 (BK/LG) AND 406 (BN/WH) FORVOLTAGE

• Key in OFF position.• Disconnect: Rear Wiper Motor C476.• Key in ON position.• Measure the voltage between rear wiper motor C476 pin 3,

circuit 297 (BK/LG), harness side and ground; and between rearwiper motor C476 pin 4, circuit 406 (BN/WH), harness side andground.

YesGO to B2.


• Are the voltages greater than 10 volts? the system for normal operation.

B2 CHECK CIRCUIT 57 (BK) FOR OPEN

• Key in OFF position.• Measure the resistance between rear wiper C476 pin 1, circuit

57 (BK), harness side and ground.

YesGO to B3.



B3 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to B4.• Carry out the multi-function switch component test. Refer to No

Wiring Diagrams Cell 149 for component testing. INSTALL a new multi-function switch.• Did the multi-function switch pass the component test? REFER to Section 211-05.

(Continued)




PINPOINT TEST B: THE REAR WIPER IS INOPERATIVE (EXCURSION ONLY) (Continued)


B4 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to B5.



B5 CHECK CIRCUITS 993 (BN/WH) AND 1300 (PK) FOR OPENS

• Measure the resistance between the multi-function switch C202bpin 11, circuit 993 (BN/WH) harness side and the rear wipermotor C476 pin 6, circuit 993 (BN/WH) harness side: andbetween the multi-function switch C202b pin 2, circuit 1300 (PK)harness side and the rear wiper motor C476 pin 7, circuit 1300(PK) harness side.

YesGO to B6.



B6 CHECK FOR CORRECT WIPER MOTOR OPERATION

• Disconnect all wiper motor connectors. Yes• Check for: INSTALL a new rear window wiper motor.

— corrosion. REFER to Rear Window Wiper Motor in— pushed-out pins. this section.




PINPOINT TEST C: THE WINDSHIELD WIPERS STAY ON CONTINUOUSLY


C1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to C2.• Carry out the multi-function switch component test. Refer to No


(Continued)




PINPOINT TEST C: THE WINDSHIELD WIPERS STAY ON CONTINUOUSLY (Continued)


C2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to C3.



C3 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD), AND 63(RD) FOR SHORTS

• Disconnect: Windshield Wiper Motor C125.• Using the following table, measure the resistance between the

windshield wiper motor C125 harness side and ground:

Windshield Wiper Motor C125 Ground

pin 10, circuit 56 (DB/OG) ground

pin 11, circuit 58 (WH) ground

pin 1, circuit 61 (YE/RD) ground

pin 9, circuit 63 (RD) ground

YesGO to C4.


• Is the resistance greater than 10,000 ohms? the system for normal operation.

C4 CHECK FOR CORRECT WIPER MOTOR OPERATION









PINPOINT TEST D: THE REAR WIPER STAYS ON CONTINUOUSLY (EXCURSION ONLY)


D1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to D2.• Carry out the multi-function switch component test. Refer to No


D2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to D3.



D3 CHECK CIRCUITS 993 (BN/WH) AND 1300 (PK) FOR SHORTS

• Disconnect: Rear Window Wiper Motor C476.• Measure the resistance between the rear window wiper motor

C476 pin 6, circuit 993 (BN/WH), harness side and ground; andbetween the rear wiper motor C476 pin 7, circuit 1300 (PK),harness side and ground.

YesGO to D4.


• Are the resistances greater than 10,000 ohms? the system for normal operation.

D4 CHECK FOR CORRECT WIPER MOTOR OPERATION









PINPOINT TEST E: THE HIGH/LOW WINDSHIELD WIPER SPEEDS DO NOT OPERATE CORRECTLY


E1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to E2.• Carry out the multi-function switch component test. Refer to No

Wiring Diagrams Cell 149 for component testing. INSTALL a new multi-function switch.• Did the multi-function switch pass the component test? REFER to Section 211-05. TEST the


E2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to E3.



E3 CHECK CIRCUITS 56 (DB/OG), 61 (YE/RD), AND 63 (RD) FOROPENS


multi-function switch C202b harness side and the windshieldwiper motor C125 harness side:





YesGO to E4.



(Continued)




PINPOINT TEST E: THE HIGH/LOW WINDSHIELD WIPER SPEEDS DO NOT OPERATE CORRECTLY(Continued)


E4 CHECK FOR CORRECT WIPER MOTOR OPERATION






PINPOINT TEST F: THE LOW REAR WINDOW WIPER SPEED DOES NOT OPERATE CORRECTLY


F1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to F2.• Carry out the multi-function switch component test. Refer to No


F2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to F3.



F3 CHECK CIRCUITS 993 (BN/WH) AND 1300 (PK) FOR OPENS

• Disconnect: Rear Window Wiper Motor C476.

(Continued)




PINPOINT TEST F: THE LOW REAR WINDOW WIPER SPEED DOES NOT OPERATE CORRECTLY(Continued)


F3 CHECK CIRCUITS 993 (BN/WH) AND 1300 (PK) FOR OPENS(Continued)

• Measure the resistance between the multi-function switch C202bpin 11, circuit 993 (BN/WH) harness side and the rear wipermotor C476 pin 6, circuit 993 (BN/WH) harness side; andbetween the multi-function switch C202b pin 12, circuit 1300(PK) harness side and the rear wiper motor C476 pin 7, circuit1300 (PK) harness side.

YesGO to F4.



F4 CHECK FOR CORRECT WIPER MOTOR OPERATION






PINPOINT TEST G: THE INTERMITTENT WINDSHIELD WIPER SPEED DOES NOT OPERATECORRECTLY


G1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to G2.• Carry out the multi-function switch component test. Refer to No

Wiring Diagrams Cell 149 for component testing. INSTALL a new multi-function switch.• Did the multi-function switch pass the component test? REFER to Section 211-05. TEST the


(Continued)




PINPOINT TEST G: THE INTERMITTENT WINDSHIELD WIPER SPEED DOES NOT OPERATECORRECTLY (Continued)


G2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to G3.



G3 CHECK CIRCUITS 56 (DB/OG), 61 (YE/RD), AND 63 (RD) FOROPENS


multi-function switch C202b harness side and the windshieldwiper motor C125 harness side:





pin 3, circuit 58 (WH) pin 11, circuit 58 (WH)

YesGO to G4.



G4 CHECK FOR CORRECT WIPER MOTOR OPERATION









PINPOINT TEST H: THE INTERMITTENT REAR WIPER SPEED DOES NOT OPERATE CORRECTLY


H1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to H2.• Carry out the multi-function switch component test. Refer to No


H2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to H3.



H3 CHECK CIRCUITS 993 (BN/WH) AND 1300 (PK) FOR OPENS

• Disconnect: Rear Window Wiper Motor C476.• Measure the resistance between the multi-function switch C202b

pin 11, circuit 993 (BN/WH) harness side and the rear wipermotor C476 pin 6, circuit 993 (BN/WH) harness side; andbetween the multi-function switch C202b pin 12, circuit 1300(PK) harness side and the rear wiper motor C476 pin 7, circuit1300 (PK) harness side.

YesGO to H4.



H4 CHECK FOR CORRECT WIPER MOTOR OPERATION









PINPOINT TEST I: THE WINDSHIELD WIPERS DO NOT OPERATE CORRECTLY IN THE MIST POSITION


I1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to I2.• Carry out the multi-function switch component test. Refer to No


I2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to I3.



I3 CHECK CIRCUIT 589 (OG) FOR OPEN

• Disconnect: Windshield Wiper Motor C125.• Measure the resistance between C202b pin 5, circuit 589 (OG),

harness side and C125 pin 12, circuit 589 (OG), harness side.

YesGO to Pinpoint Test K.



PINPOINT TEST J: THE REAR WINDOW WIPER WASH AND WIPE FUNCTION DOES NOT OPERATE


J1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to J2.• Carry out the multi-function switch component test. Refer to No


(Continued)




PINPOINT TEST J: THE REAR WINDOW WIPER WASH AND WIPE FUNCTION DOES NOT OPERATE(Continued)


J2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesGO to J3.



J3 CHECK CIRCUIT 993 (BN/WH) FOR OPEN

• Key in OFF position.• Disconnect: Rear Window Wiper Motor C476.• Measure the resistance between C202b pin 11, circuit 589 (OG),

harness side and C476 pin 6, circuit 993 (BN/WH), harnessside.

YesGO to Pinpoint Test K.



PINPOINT TEST K: THE WASHER PUMP IS IN OPERATIVE


K1 CHECK THE MULTI-FUNCTION SWITCH

• Key in OFF position. Yes• Disconnect: Multi-function Switch C202b. GO to K2.• Carry out the multi-function switch component test. Refer to No


(Continued)




PINPOINT TEST K: THE WASHER PUMP IS IN OPERATIVE (Continued)


K2 CHECK CIRCUIT 57 (BK) FOR OPEN


YesFor Excursion only GO to K3. All othersGO to K11.



K3 CHECK CIRCUIT 993 (BN/WH) FOR OPEN (EXCURSION ONLY)

• Key in OFF position.• Disconnect: Rear Window Wiper Motor C476 (Excursion only).• Measure the resistance between C202b pin 11, circuit 993

(BN/WH), harness side and C476 pin 6, circuit 993 (BN/WH),harness side.

YesGO to K4.




• Measure the resistance between C476 pin 2, circuit 57 (BK)harness side and ground.

YesGO to K5.



(Continued)






K5 CHECK CIRCUIT 406 (BN/WH) FOR VOLTAGE

• Key in ON position.• Measure the voltage between C476 pin 4, circuit 406 (BN/WH)

harness side and ground.

YesGO to K6.

NoVERIFY CJB fuse 21 (25A) is OK. If OK,REPAIR the circuit. TEST the system for

• Is the voltage greater than 10 volts? normal operation.

K6 CHECK CIRCUIT 941 (PK/LG) FOR VOLTAGE

• Key in OFF position.• Connect: Rear Window Wiper Motor C476.• Disconnect: Washer Pump Motor C137.• Key in ON position.• Measure the voltage between C137 pin 1, circuit 941 (PK/LG)

harness side and ground while depressing the multi-functionswitch to the wash position.

YesGO to K8.

No• Is the voltage greater than 10 volts? GO to K7.

K7 CHECK CIRCUIT 941 (BN/WH) AND 946 (PK/LG) FOR OPEN

• Key in OFF position.• Disconnect: Rear Window Wiper Motor C476.

(Continued)






K7 CHECK CIRCUIT 941 (BN/WH) AND 946 (PK/LG) FOR OPEN(Continued)

• Measure the resistance between C476 pin 5, circuit 946(PK/LG), harness side and C137 pin 1, circuit 941 (PK/LG),harness side.

YesINSTALL a new rear window wiper motor.REFER to Rear Window Wiper Motor inthis section.



K8 CHECK CIRCUIT 946 (BK/WH) FOR GROUND

• Measure the resistance between C137 pin 2, circuit 946(BK/WH) harness side and ground.

YesINSTALL a new washer pump. REFER toWasher Pump and Reservoir in thissection.

No• Is the resistance less than 5 ohms? GO to K9.

K9 CHECK CIRCUIT 946 (BK/WH) FOR OPEN

• Disconnect: Windshield Wiper Motor C125.• Measure the resistance between C125 pin 7, circuit 946

(BK/WH), harness side and C137 pin 2, circuit 946 (BK/WH),harness side.

YesGO to K10.



(Continued)







• Measure the resistance between C125 pin 6, circuit 57 (BK)harness side and ground.

YesINSTALL a new windshield wiper motor.REFER to Windshield Wiper Motor in thissection.



K11 CHECK CIRCUIT 589 (OG) FOR OPEN

• Key in OFF position.• Disconnect: Windshield Wiper Motor C125.• Disconnect: Multi-function Switch C202b.• Measure the resistance between C125 pin 12, circuit 589 (OG),

harness side and C202b pin 5, circuit 589 (OG), harness side.

YesGO to K12.



K12 CHECK CIRCUIT 65 (DG) FOR VOLTAGE

• Key in ON position.• Measure the voltage between C125 pin 5, circuit 65 (DG)

harness side and ground.

YesGO to K13.

NoVERIFY CJB fuse 106 (30A) is OK. If OK,REPAIR the circuit. TEST the system for

• Is the voltage greater than 10 volts? normal operation.

(Continued)






K13 CHECK CIRCUIT 946 (PK/LG) FOR VOLTAGE

• Key in OFF position.• Connect: Rear Window Wiper Motor C476.• Disconnect: Washer Pump Motor C137.• Key in ON position.• Measure the voltage between C137 pin 2, circuit 946 (BK/WH)

harness side and ground while depressing the multi-functionswitch to the wash position.

YesGO to K15.

No• Is the voltage greater than 10 volts? GO to K14.

K14 CHECK CIRCUIT 946 (BK/WH) FOR OPEN

• Key in OFF position.• Disconnect: Windshield Wiper Motor C125.• Measure the resistance between C125 pin 7, circuit 946

(BK/WH) (Excursion) or circuit 994 (BK/WH) (all others), harnessside and C137 pin 2, circuit 946 (BK/WH) (Excursion) or circuit994 (BK/WH) (all others), harness side.

YesINSTALL a new windshield wiper motor.REFER to Windshield Wiper Motor in thissection.



(Continued)







• Measure the resistance between C137 pin 1, circuit 941 (BK)(Excursion) or C137 circuit 57 (BK) (all others) harness side andground.

YesINSTALL a new washer pump. REFER toWasher Pump and Reservoir in thissection.



PINPOINT TEST L: THE WINDSHIELD WIPER SPEED DEPENDENT INTERVAL MODE DOES NOTOPERATE CORRECTLY


L1 CHECK THE ABS — MONITOR THE VSS

• Monitor VSS while driving the vehicle from 0 to 88.5 kph (55 Yesmph). GO to L2.

• Does the VSS agree with the ABS PIDs? NoREFER to Section 206-09.

L2 CHECK CIRCUIT 679 (GY/BK) FOR AN OPEN

• Disconnect: ABS C135.• Disconnect: Windshield Wiper Motor C125.• Measure the resistance between anti-lock brake control module

C135 pin 11, circuit 679 (GY/BK), harness side and windshieldwiper motor C125 pin 4, circuit 679 (GY/BK), harness side.

YesGO to L3.



(Continued)




PINPOINT TEST L: THE WINDSHIELD WIPER SPEED DEPENDENT INTERVAL MODE DOES NOTOPERATE CORRECTLY (Continued)


L3 CHECK CIRCUIT 679 (GY/BK) FOR A SHORT TO GROUND

• Measure the resistance between ABS C135 pin 11, circuit 679(GY/BK), harness side and ground.

YesGO to L4.


• Is the resistance greater than 10,000 ohms? normal operation.

L4 CHECK CIRCUIT 679 (GY/BK) FOR A SHORT TO VOLTAGE

• Key in ON position.• Measure the voltage between ABS C135 pin 11, circuit 679

(GY/BK), harness side and ground.

YesREPAIR the circuit. TEST the system fornormal operation.

No• Is voltage present? GO to L5.

L5 CHECK FOR CORRECT WIPER MOTOR OPERATION

• Key in OFF position. Yes• Disconnect all wiper motor connectors. INSTALL a new windshield wiper motor.• Check for: REFER to Windshield Wiper Motor in this

— corrosion. section.— pushed-out pins. No

• Connect all wiper motor connectors and make sure they seat The system is operating correctly at thiscorrectly. time. Concern may have been caused by

• Operate the system and verify the concern is still present. a loose or corroded connector. TEST the• Is the concern still present? system for normal operation.


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