Intermittent Wipe Module - Dodge ram truck 3500 1996 Service Manual

81 - 2 WIPER AND WASHER SYSTEMS
DESCRIPTION AHP OPERATION
(Continued)
cleaner. I f the squeegees continue to streak or smear,
they should be replaced.
The blades are mounted to two spring-loaded wiper
arms. Spring tension of the wiper arms controls the
pressure applied to the blades on the windshield. The
wiper arms are attached by an integral latch to the
two wiper pivots on the cowl plenum cover/grille
panel at the base of the windshield. The wiper arms
and blades cannot be adjusted or repaired. I f faulty,
they must be replaced.
WIPER LINKAGE AND PIVOTS
The wiper linkage and pivot module is fastened
with screws to the cowl plenum panel beneath the
cowl plenum cover/grille panel. The wiper motor is
fastened with screws to the center of the linkage and
pivot module bracket. The wiper pivots are fastened
to the ends of the module bracket.
The two wiper pivot crank arms and the wiper
motor crank arm each have ball studs on their ends.
The motor crank arm ball stud is the longer of the
three. Two drive links connect the motor crank arm
to the pivot crank arms. The right drive link has a
plastic socket-type bushing on each end. The left
drive link has a plastic socket-type bushing on one
end, and a plastic sleeve-type bushing on the other
end. The socket-type bushing on one end of each
drive link is fit over the ball stud on the crank arm
of its respective pivot. The left drive link sleeve-type
bushing end is-then fit over the motor crank arm ball
stud, and the other socket-type bushing of the right
drive link is snap-fit over the exposed end of the
motor crank arm ball stud.
The wiper linkage, pivots, bushings, and mounting
bracket are only serviced as a complete unit. I f any
part of this assembly is faulty, the entire unit must
be replaced. The wiper motor and motor crank arm
are serviced separately.
WIPER MOTOR
The two-speed permanent magnet wiper motor has
an integral transmission and park switch. The motor
is mounted to the wiper linkage and pivot module
bracket with three screws. The motor output shaft
passes through a hole in the module bracket, where a
nut secures the wiper motor crank arm to the motor
output shaft.
Wiper speed is controlled by current flow to the
appropriate set of brashes. The wiper motor com­
pletes its wipe cycle when the wiper/washer (multi­
function) switch is turned to the Off position, and
parks the blades in the lowest portion of the wipe
pattern. The wiper motor cannot be repaired. I f
faulty, the entire wiper motor assembly must be
replaced. The motor crank arm and the linkage and
pivot module are available for service.
WIPER AND WASHER SWITCHES
The wiper and washer switches are contained in
the multi-function switch assembly. The multi-func­
tion switch assembly is mounted to the left side of
the steering column (Fig. 1). This switch contains cir­
cuitry for the following functions:
• Turn signals
• Hazard warning
• Headlamp beam selection
• Headlamp optical horn
© Windshield wipers
• Windshield washers.
The information contained i n this group addresses
only the switch functions for the wiper and washer
systems. For information relative to the other switch
functions, refer to the appropriate group. However,
the multi-function switch cannot be repaired. I f any
function of the switch is faulty, the entire switch
assembly must be replaced.
HAZARD W A R N I N G
J938J-3
Fig. 1 Multi-Function Switch
INTERMITTENT WIPE MODULE
In addition to low and high speed, the intermittent
wipe system has a delay mode. The delay mode has a
range of two to fifteen seconds.
The length of the delay is selected with a variable
resistor i n the wiper (multi-function) switch, and is
accomplished by electronic circuitry within the inter­
mittent wipe module. If the washer knob is depressed
while the wiper switch is in the Off position, the
intermittent wipe module will operate the wiper
motor for approximately two wipes and automatically
turn off the motor.
The intermittent wipe module is snap-fit onto a
single blade-type mounting bracket located under the
instrument panel, The module cannot be repaired
and, i f faulty, must be replaced.