Buick LeSabre 1965 Service Manual page 670

1 0 - 1 0 0 DISASSEMBLY AND ASSEMBLY ELECTRICAL SYSTEMS
SECURE SPLICE CONNEC-
/^=TIONS IN BRUSH HOLDER
JJ BRACKETS. DO NOT
" TAPE OR SOLDER THESE
JOINTS
TO WIPER
TERMINAL BOARD
Figure 10-103-Motor Wiring
wiper terminal No. 2 (Figure 10-
102). DO NOT connect any jumper
wire to terminal No. 1.
If wiper now shuts off correctly,
check for a ground in lead that
extends between wiper terminal
No. 1 and dash switch.
If wiper still fails to shut off-
remove wiper from car and follow
instructions under " Trouble-
Shooting Wiper Out of Car".
3. Intermittent or Slow Operation
BRUSH HOLDER
REMOVE BRUSH SPRING FROM
SLOT AND PLACE IT IN GROOVE
AS SHOWN
Figure 10-104—Releasing Brush Holder
Spring Pressure
(a) Check the following: Loose
ground strap, loose dash switch
mounting, loose connection.
4. Wiper Will Not Park
(a) Remove wiper from car and
check for a dirty or broken park
switch.
c. Wiper Out of Car
Connect a 12 volt supply and an
ammeter to wiper as shown in
Figure 10-102 and observe cur-
rent draw and wiper operation.
1. Wiper Inoperative
(a) Current Draw - 0.
(1) Check solder connection at
terminal board.
(2) Disassemble motor section
and check all splice connections
(Figure 10-103).
(b) Current Draw - 1-1.5 amps.-
Disassemble motor and check for
the following items:
(1) Open armature.
(2) Brushes sticking.
(3) Brush springs improperly po-
sitioned (See Figure 10-104).
(4) Brush pigtail connections at
splice joints (Figure 10-103).
(c) Current Draw - 10-12 amps.
(1) Check for open shunt field
circuit.
(2) Check for broken gear.
2. Wiper Will Not Shut Off.
Wiper crank arm fails to stop in
park position when jumper wire
is removed from wiper terminal
No. 1 (Figure 10-102).
(a) Check that park switch con-
tacts are opening.
(b) Check for grounded condition
in the internal motor lead that
connects to terminal No. 1, Fig-
ure 10-102.
3. Intermittent or Slow Operation
(a) Current Draw - 7-9 amps.
(1) Check for binds in gear train.
Figure 10-105—Single Speed Wiper
(2) Check for shorted armature.
(Armature may be checked on a
growler).
4. Wiper Will Not Park.
Wiper crank arm stops rotating
immediately when jumper wire
is disconnected from wiper ter-
minal No. 1 (Figure 10-102).
NOTE: Crank arm should con-
tinue to rotate until park position
is reached (Figure 10-100).
1 0 - 5 6 DISASSEMBLY AND
ASSEMBLY-
SINGLE SPEED
a. Gear Box Disassembly
1. Remove washer pump drive
cam as required (Figure 10-105).
The cam is pressed on the shaft
but can be wedged off by using
two screwdrivers between cam
and plate.
2. Clamp crank arm in a vise
and loosen crank arm retaining
nut.
3. Remove s e a l cap, retaining
ring and end-play washer. NOTE:
Seal cap should be cleaned and
repacked with a waterproof type
grease before reassembly.