Washer Pump - Jeep 1979 CJ-5 Technical & Service Manual

When the wiper switch is moved to the low speed
position, current flows from the fuse panel to terminal B
(fig. 3T-4) of the wiper switch, through the wiper switch
to terminal 2, then through the green wire to the motor
low-speed brush and through the armature to ground.
With the wiper switch in the high speed position,
current flows from the fuse panel to terminal B of the
wiper switch, through the wiper switch to terminal 3,
then through the red wire to the motor high speed brush
and through the armature to ground.
When the wiper switch is turned off, current flows
from the fuse panel to terminal B of the wiper switch,
through the wiper switch to terminal 1, then through
the black wire to the park contact points to the motor
low speed brush and through the armature to ground.
When the cam on the wiper drive gear opens the park
contact points, the feed circuit to the motor low speed
brush is interrupted and the motor is in park.
Selector Position
Off or Park
B-1
Low Speed B-2
High Speed B-3
Wash B-W
8 0 3 4 3
Fig. 3T-4 Continuity Test for Wiper Switch
Troubleshooting Procedures
The wiper motor may be operated independently of
the switch to aid in determining defective components.
NOTE: The wiper motor must be grounded for proper
operation and during all wiper tests.
With ignition switch on, check for 12 volts at switch
terminal B. If 12-volt test lamp lights but wiper motor
does not operate, connect a jumper wire from ground
strap on motor to a good body ground. If motor still does
not operate, disconnect wiring from switch. Using a
jumper wire, connect switch terminals 2 and B. This
connection should give low speed operation. If wiper
motor does not operate in low speed, there is an open in
the green wire, a defective internal motor connection or
a stuck low speed brush.
To obtain high speed, connect a jumper wire between
terminals 3 and B. If wiper motor fails to operate, there
is an open in the red wire, a defective internal motor
connection, or a stuck high speed brush.
With the wiper blades in a position other than park,
connect a jumper wire between terminals 1 and B. The
wiper blades should run on low speed and stop in the
park position. If the motor does not run after making
the jumper connection, there is an open in the black
wire, a defective internal motor connection, a mis-
aligned or damaged set of contact points or a bad con-
nection through the park point set to the low speed
brush. If the wiper motor runs but does not park, the
cam on the drive gear is not sufficiently breaking the
contact points.
If wiper motor operation is intermittent, a defective
solder joint, wiring connection, body ground or worn
brush may cause the condition.
Remowal with Crash Pad
NOTE: Without crash pad, remove wiper motor cover.
(1) Remove necessary top components from wind-
shield frame.
(2) Remove right and left windshield holddown
knobs and fold windshield down.
(3) Remove left access hole cover.
(4) Disconnect drive link from left wiper pivot.
(5) Disconnect wiper motor wire harness from
switch.
(6) Remove attaching screws and remove wiper
motor.
Installation With Crash Pad
(1) Position wiper motor on windshield frame and
install attaching screws.
(2) Connect wiper motor wire harness to switch.
(3) Connect drive link to left wiper pivot.
(4) Install left access hole cover.
(5) Raise windshield to upright position and install
right and left windshield holddown knobs.
(6) Install necessary top components on windshield
frame.
WASHER PU1P
The electric washer pump assembly is mounted in the
water reservoir. The impeller motor case is grounded to
the body sheet metal by a black ground wire. It is ener-
gized by a yellow feed wire from the single blade termi-
nal on the control switch.