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WINDSHIELD WIPER SYSTEM
8-77
WINDSHIELD WIPER SYSTEM
Description
The wiper motor is connected to the wiper switch
the wiper motor can be actuated only when the igni-
"ACC," accessory, terminal of the ignition switch so
the wiper motor can be acutated only when the igni-
tion switch is turned to the right or left positions. The
wiper circuitry is protected by a circuit breaker that
is built into the wiper switch.
The variable speed wiper system has a depressed
parking feature which is accomplished by reversing
the direction of the wiper motor and the use of a
parking cam on the motor crank pin. When the wiper
switch is turned
"OFF,"
the motor direction is re-
versed and at the same time the parking cam rotates
180
degrees, lengthening the drive link slightly to
park the wiper blades in a depressed position. The
drive link shortens when the motor runs in the wipe
direction (Figs. 1, 2 and
3).
SERVICE PROCEDURES
WIPER ARM ADJUSTMENT
and AV-2, parallel to the windshield glass, at the end
of the wiper arm (where the wiper blade is attached
to the arm). With the force applied, pull the wiper
blade away from the windshield glass once or twice
to prevent glass friction from affecting upward move-
ment of the wiper arm and blade. With the force ap-
Variable Speed
To determine if an adjustment is required, apply a
constant
upward
force of
50
ounces, for Models AR-1,
AR-2, AP-1 and AP-2
and
30 ounces for Models AV-1
MOTOR
DRIVE LINK
VIEW IN ClRC
(SINGLE SPEI
SPRING
/WASHER
IER
1ER
PIVOT
CONNECTING
LINK
PARKING C A M
WIPER
%SPRING
(VARIABLE SPEED)
NK515
Fig. I-Wiper
System-Models
A V - I and AV-2
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