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WINDSHIELD WIPER AND WASHER SYSTEMS
8K - 5
I N T E R M I T T E N T W I N D S H I E L D W I P E R F U N C T I O N A N D S W I T C H
T E S T I N G
P R O C E D U R E S
INDEX
Page
Intermittent Windshield Wiper Function Tests . . . . . 5
Intermittent Wipe Module Location
5
INTERMITTENT WINDSHIELD WIPER FUNCTION
TESTS
Since t h e i n t e r m i t t e n t wipe
a n d standard t w o
speed motors are identical. Refer t o previous sections
for diagnosis o f system problems w h i c h do n o t i n -
volve the D E L A Y function. I f problem occurs o n l y i n
t h e D E L A Y mode, the f o l l o w i n g tests are t o be per-
formed. These tests involve disconnecting the i n t e r -
m i t t e n t wipe control u n i t w h i c h can be found on t h e
steering c o l u m n support bracket (refer t o I n t e r m i t -
t e n t Wipe Module Location).
CONDITION
E x c e s s i v e delay (more t h a n 30 seconds) o r i n -
a d e q u a t e v a r i a t i o n i n delay.
PROCEDURE
V a r i a t i o n s i n delay should be as follows:
(1) M i n i m u m delay (delay control to extreme coun-
terclockwise position before first detent) one h a l f t o
t w o seconds.
(2) M a x i m u m delay (delay control to extreme clock-
wise position before off detent) t e n to t h i r t y seconds.
(3) I f there is excessive delay or no variations i n
delay proceed to i n t e r m i t t e n t wipe switch test.
CONDITION
I n D E L A Y mode w i p e r s r u n continually w h e n
w a s h i s o p e r a t e d b u t d o n o t provide a n e x t r a
w i p e w h e n the w a s h c o n t r o l i s released.
PROCEDURE
Replace t h e control u n i t .
Page
Intermittent Wipe Switch Test
5
CONDITION
Wipers start e r r a t i c a l l y d u r i n g D E L A Y mode.
PROCEDURE
(1) Verify t h a t t h e ground connection a t t h e i n s t r u -
ment panel is m a k i n g good connection (free f r o m
paint) a n d is t i g h t .
(2) Verify t h a t the motor ground strap i s m a k i n g
good contact and t h a t the motor m o u n t i n g bolts are
t i g h t .
(3) Verify t h a t the w i r i n g ground connections for
the i n t e r m i t t e n t wipe control u n i t a n d t h e wiper
switch are t i g h t .
(4) I f condition is n o t corrected, replace control
u n i t .
INTERMITTENT WIPE SWITCH TEST
To test the switch, first disconnect t h e s w i t c h wires
from the body w i r i n g at the connector. T h e n , u s i n g a
continuity tester or a n ohmmeter, test for c o n t i n u i t y
(no resistance) between the t e r m i n a l s o f t h e harness
side o f the switch connector as shown i n t h e continu-
i t y chart.
For test purposes, the first (or clockwise) position is
the OFF position, next is the slide f o r t h e
D E L A Y
wipe, w i t h counterclockwise r o t a t i o n , r e d u c i n g t h e
delay. Low is the next detent position a n d H I G H is
the f u l l counterclockwise detent position.
I n any wiper mode, i f the knob i s pushed a l l the
way i n , the washer circuit w i l l be completed.
INTERMITTENT WIPE MODULE LOCATION
The i n t e r m i t t e n t wipe module is located t o t h e
r i g h t o f the steering column on the back side o f the
i n s t r u m e n t panel (Fig. 2).
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