1. ELECTRICAL ACCESSORIES
CHAPTER 11

2. WINDSHIELD WIPERS SYSTEMS OPERATION
CHAPTER 11

3. OBJECTIVES
Explain operation of 2 and 3 speed wiper motors, permanent magnet and electromagnetic field designs
Describe intermittent wipers
Explain depressed wipers
Explain washer pump systems

4. TYPES OF WIPER SYSTEMS STANDARD TWO & THREE SPEED SYSTEM
TWO OR THREE SPEED WITH INTERMITTENT OPERATION
BOTH CAN INCLUDE DEPRESSED FEATURE
INTERMITTENT WIPER SYSTEMS

5. PERMANENT WIPER MOTORS
MOTORS USE PERMANENT MAGNET FIELDS
SPEED IS CONTROLLED BY BRUSH PLACEMENT
3 BRUSHES, COMMON, LOW , HIGH
FIG 11-12

6. ELECTROMAGNETIC FIELD MOTORS
SPEED CONTROLLED BY SHUNT FIELD
USUALLY GROUND TYPE SWITCH CONTROLLED
OFF POSITION
11-19

7. LOW SPEED 2 SPEED SYSTEM

8. HIGH SPEED 2 SPEED SYSTEM

9. PARKING 2 SPEED SYSTEM
11-22

10. 3 SPEED SYSTEM MEDIUM POSITION
11-25

11. INTERMITTENT WIPERS
Power for wiper motor is supplied by module (capacitor)
Module uses low speed circuit
Motor uses park contact to make one sweep per activation
FIG CLASS MANUAL

12. INTERMITTENT WIPERS

13. DEPRESSED WIPER SYSTEM
CURRENT TRAVELS THROUGH WIPER/WASHER SWITCH TWICE.
DOUBLE PARK SWITCHES PROVIDE REVERSE CURRENT THROUGH IN PARK POSITION ALLOWING 15 DEGREES REVERSE MOTOR ROTATION.
SEE C

14. DEPRESSED IN LOW SPEED

15. DEPRESSED WHEN PARKING

16. DEPRESSED OFF AFTER PARKING

17. WASHER PUMPS
PUMPS CAN BE EXTERNAL OR INTERNAL TO WIPER MOTOR ASSY.
INTERMITTENT WIPERS HAVE TIMED WASHER
11-36
C341

18. THE END OF WIPERS SYSTEMS