ELECTRICAL ACCESSORIESELECTRICAL ACCESSORIES

CHAPTER 11CHAPTER 11

WINDSHIELD WIPERS WINDSHIELD WIPERS SYSTEMS OPERATIONSYSTEMS OPERATION

CHAPTER 11CHAPTER 11

OBJECTIVESOBJECTIVES

Explain operation of 2 and 3 speed Explain operation of 2 and 3 speed wiper motors, permanent magnet and wiper motors, permanent magnet and electromagnetic field designselectromagnetic field designs

Describe intermittent wipersDescribe intermittent wipers Explain depressed wipersExplain depressed wipers Explain washer pump systemsExplain washer pump systems

TYPES OF WIPER SYSTEMSTYPES OF WIPER SYSTEMS

STANDARD TWO & THREE SPEED STANDARD TWO & THREE SPEED SYSTEMSYSTEM

TWO OR THREE SPEED WITH TWO OR THREE SPEED WITH INTERMITTENT OPERATIONINTERMITTENT OPERATION

BOTH CAN INCLUDE DEPRESSED BOTH CAN INCLUDE DEPRESSED FEATUREFEATURE

INTERMITTENT WIPER SYSTEMSINTERMITTENT WIPER SYSTEMS

PERMANENT WIPER PERMANENT WIPER MOTORSMOTORS

MOTORS USE MOTORS USE PERMANENT PERMANENT MAGNET FIELDS MAGNET FIELDS

SPEED IS SPEED IS CONTROLLED BY CONTROLLED BY BRUSH BRUSH PLACEMENTPLACEMENT

3 BRUSHES, 3 BRUSHES, COMMON, LOW , COMMON, LOW , HIGHHIGH

FIG 11-12

ELECTROMAGNETIC FIELD ELECTROMAGNETIC FIELD MOTORSMOTORS

SPEED SPEED CONTROLLED CONTROLLED BY SHUNT BY SHUNT FIELDFIELD

USUALLY USUALLY GROUND TYPE GROUND TYPE SWITCH SWITCH CONTROLLEDCONTROLLED

OFF POSITIONOFF POSITION11-19

LOW SPEED LOW SPEED 2 SPEED SYSTEM2 SPEED SYSTEM

HIGH SPEEDHIGH SPEED2 SPEED SYSTEM2 SPEED SYSTEM

PARKINGPARKING2 SPEED SYSTEM2 SPEED SYSTEM

11-22

3 SPEED SYSTEM3 SPEED SYSTEMMEDIUM POSITIONMEDIUM POSITION

11-25

INTERMITTENT WIPERSINTERMITTENT WIPERS

Power for wiper motor is supplied by Power for wiper motor is supplied by module (capacitor)module (capacitor)

Module uses low speed circuitModule uses low speed circuit Motor uses park contact to make one Motor uses park contact to make one

sweep per activationsweep per activation

FIG 11-29. CLASS MANUAL

INTERMITTENT WIPERSINTERMITTENT WIPERS

DEPRESSED WIPER SYSTEMDEPRESSED WIPER SYSTEM

CURRENT TRAVELS THROUGH CURRENT TRAVELS THROUGH WIPER/WASHER SWITCH TWICE.WIPER/WASHER SWITCH TWICE.

DOUBLE PARK SWITCHES PROVIDE DOUBLE PARK SWITCHES PROVIDE REVERSE CURRENT THROUGH IN REVERSE CURRENT THROUGH IN PARK POSITION ALLOWING 15 PARK POSITION ALLOWING 15 DEGREES REVERSE MOTOR DEGREES REVERSE MOTOR ROTATION.ROTATION.

SEE C338 - 339

DEPRESSED IN LOW SPEEDDEPRESSED IN LOW SPEED

DEPRESSED WHEN PARKINGDEPRESSED WHEN PARKING

DEPRESSED OFF AFTER DEPRESSED OFF AFTER PARKINGPARKING

WASHER PUMPSWASHER PUMPS

PUMPS CAN BE PUMPS CAN BE EXTERNAL OR EXTERNAL OR INTERNAL TO INTERNAL TO WIPER MOTOR WIPER MOTOR ASSY.ASSY.

INTERMITTENT INTERMITTENT WIPERS HAVE WIPERS HAVE TIMED WASHERTIMED WASHER

C34111-36

THE END OF WIPERS THE END OF WIPERS SYSTEMSSYSTEMS