ELECTRICAL-BODY AND CHASSIS 12-35
SERVICE OPERATIONS
INSTRUMENT CLUSTER
REMOVAL AND INSTALLATION (Fig. 49)
1.
Remove mast jacket assembly. Refer to Section 9
for removal procedures.
2.
Disconnect tachometer drive cable at distributor.
3.
Disconnect the headlamp panel control switch from
instrument cluster.
4.
Remove lighting switch as outlined in this section.
10 10-A 1112 13
14
15 16 17 18 19
Fig.
49- Instrument Cluster Connections
1.
Cluster Illuminating
Bulbs
2.
Direction Signal Indicator
Bulb L.H.
3. Direction Signal Indicator
BulbR.H.
4.
Headlamp Actuating Motor
Indicator
5. Headlamp Hi Beam
Indicator
6. Parking Brake Alarm
Indicator
7. Ground Lead Attaching
Point
8. Temperature Indicator
"1"
Terminal
9.
10.
10A.
11.
12.
13.
14.
]5.
16.
17.
18.
19.
20.
21.
Temperature Indicator "S"
Terminal
Ignition Switch Receptacle
ignition Switch Illuminating
Bulb
Oil Pressure Indicator
Tachometer
Lighter Receptacle
Trip Odometer
Wiper Switch Receptacle
Speedometer
Ammeter "Gen" Terminal
Ammeter "Battery" Terminal
Lighting Switch Receptacle
Fuel Gauge
"1"
Terminal
Fuel Gauge "S" Terminal
5. Remove the ignition switch. Refer to Section 6Y
for removal procedure. Then disconnect ignition
switch lamp support at instrument panel.
6. Disconnect oil pressure line at oil pressure gauge
then remove the lead wires from ammeter, wiper
switch and cigarette lighter. Disconnect trip odom-
eter at mast jacket support.
7. Remove the instrument cluster-to-dash retaining
screws and pull cluster assembly slightly forward
to obtain clearance for removal of speedometer
cable, tachometer cable, cluster ground wire, fuel
gauge lead wires and remaining indicator and cluster
illuminating lamps.
8. To install cluster in dash panel, reverse removal
procedure.
FUEL GAUGE
The gasoline fuel gauge circuit consists of an electri-
cal indicator in the instrument cluster and a float-
controlled rheostat in the fuel tank.
Since the fuel gauge consists of two remotely located
units and connecting wires, it is sometimes difficult to
determine which unit is at fault when the gauge fails to
operate properly. Cluster removal is necessary to re-
place the fuel gauge.
NOTE:
Be sure to check gas gauge fuse in fuse
panel before attempting to trouble shoot for
inoperative gauge or tank sending unit.
SPEEDOMETER AND/OR TACHOMETER
Removal and Installation
Cluster must be removed from vehicle to service
speedometer head assembly (see Cluster Removal pro-
cedure)
.
With cluster removed from vehicle:
1.
Remove five screws securing cluster back panel to
cluster assembly; separate the parts carefully.
CAUTION: Care must be used to avoid marring
instrument cluster face.
2.
Remove two screws securing speedometer or ta-
chometer head to cluster back panel; carefully re-
move speedometer or tachometer head.
NOTE:
Servicing of speedometer or tachom-
eter head should be performed by an authorized
AC service station.
3.
Reverse above procedure to install speedometer.
Cable Replacement or Lubrication
1.
Disconnect the. cable from the speedometer or ta-
chometer head. Remove the old cable by pulling it
out from speedometer end of conduit.
NOTE:
If old cable is broken it may be nec-
essary to remove lower piece from transmission
or distributor end of conduit as applicable.
2.
Lubricate the lower 3/4 of cable with
AC
speedom-
eter cable lubricant and push the cable into the con-
duit. Connect the upper end to the speedometer or
tachometer head and road test vehicle for proper
operation.
TEMPERATURE GAUGE
The temperature indicator requires very little service
other than testing for malfunctioning and replacing de-
fective units. Cluster must be removed to service tem-
perature gauge.
Do not attempt to repair either the engine unit or the
gauge. When installing new engine unit, do not use
thread compound on unit threads, as this will increase
electrical resistance of unit and cause faulty reading
on gauge.
AMMETER OR OIL PRESSURE GAUGE
The ammeter or oil pressure gauge requires very
little attention other than keeping ammeter terminals
clean and tight. If the oil pressure control line should
become restricted it should be blown out or replaced.
Cluster must be removed to service these gauges.
HftVKI MANUAL
ELECTRICAL-BODY AND CHASSIS 12-41
HAZARD WARNING
SWITCHES
Fig.
55- Directional Signal Switches
erating six to eight lamps simultaneously depending ve-
hicle series and model.
DIRECTIONAL SIGNAL SWITCH REPLACEMENT
All steering columns except tilt and telescoping.
Chevrolet, Chevelle, Chevy II and Camaro (Fig. 56)
1.
Disconnect battery ground cable.
2.
Disconnect signal switch wiring from chassis har-
ness at multiple connector under instrument panel.
3.
Remove steering wheel assembly as outlined in Sec-
tion 9, Steering.
4.
Remove shift lever roll pin and shift lever from
column (if applicable).
5. Push in hazard warning switch knob and unscrew
knob.
Remove switch lever arm.
6. On Chevy U and Camaro models equipped with auto-
matic transmission remove column mounted dial in-
dicator housing and lamp assembly (if applicable).
7. Remove mast jacket lower trim cover retaining
screws and remove trim cover(s).
8. On Chevrolet and Chevelle models equipped with
automatic transmission loosen set screw and remove
quadrant dial pointer (if applicable).
9. Remove retaining
"C"
ring from upper steering shaft
using snap ring remover Tool J-22569 (Refer to
Steering, Section 9). Slide thrust and wave washers
from steering shaft.
10.
Loosen three signal switch mounting screws until
assembly can be rotated counterclockwise.
NOTE:
Do not remove three screws from as-
sembly until unit is on the bench.
11.
Rotate switch assembly counterclockwise and pull
unit from top of mast jacket. Allow unit to hang
from end of column.
Fig.
56 - Standard Steering Column
CHEVROLET CHASSIS SERVICE
ELECTRICAL-BODY AND CHASSIS 12-43
23.
Install
MCtT
ring over steering shaft using snap ring
installer J-22659 (refer to Section 9).
NOTE: Be sure retaining ring is completely
seated into groove.
24.
Install dial pointer on Chevrolet and Chevelle models
equipped with automatic transmission (if applicable).
25.
Install dial indicator and lamp assembly on Camaro
and Chevy n models equipped with automatic
transmission.
26.
Install mast jacket lower trim covers (if applicable).
27.
Install hazard warning knob and turn signal lever.
28.
Install shift lever.
29.
Install steering wheel.
30.
Install multiple connector to switch wiring using old
harness for wire color guide and connect to body
harness connector.
31.
Connect battery ground cable and check operation of
assembly.
Tilt Steering Column (Fig. 57)
Chevrolet, Chevelle and Camaro
1.
Disconnect battery ground cable.
2.
Disconnect directional switch wiring harness from
body harness at multiple connector under instrument
panel.
3.
Remove steering wheel assembly (refer to Steering,
Section 9).
4.
Remove preload spring and cancelling cam from end
of shaft.
5.
Remove shift lever pin and lever from steering col-
umn (except floor shift).
6. Remove directional le*ver screw and lever.
7.
Push in hazard warning knob and unscrew knob.
8. On Camaro models equipped with automatic trans-
mission, remove quadrant dial and lamp assembly
from column.
9. Remove mast jacket trim cover
(s).
10.
On Chevrolet and Chevelle models with automatic
transmission, loosen set screw and remove quadrant
dial pointer.
11.
Assemble slide hammer Tool J-6585-1 to turn signal
cover remover Tool J-21486. Place cover remover
over turn signal cover, tighten clamp, and pull cover
from end of column with slide hammer (Refer to
Steering, Section 9).
12.
Remove three switch mounting screws, noting short
length of top screw.
13.
Cut multiple connector from switch wiring and slide
switch from end of column.
14.
To install new switch, feed wiring through the bear-
ing housing, around support, and through shift bowl
and shroud.
15.
Feed through wiring protector. If clearance is not
sufficient loosen mast jacket bracket retaining bolts.
16.
Insert switch wiring terminals in multiple connector.
Use old connector
and
wiring for color guide.
17.
Position switch and install three mounting screws
with short screw in top position.
18.
Be sure hazard warning switch is pushed in, then
install turn signal cover using special Tool J-21853.
On automatic columns align key in cover with keyway
in bearing housing.
19.
Install turn signal lever, hazard warning knob and
tilt lever.
20.
Install shift lever and roll pin (where applicable).
21.
Install dial pointer on Chevrolet and Chevelle. On
Camaro install dial indicator and lamp assembly.
22.
Install trim covers and retaining screws.
23.
Install cancelling cam and preload spring.
24.
Install steering wheel (Refer to Section 9).
25.
Connect switch wiring to body harness under instru-
ment panel.
26.
Connect battery ground cable and check operation of
unit.
Standard and Telescoping Steering Column
Corvette (Fig. 58)
1.
Disconnect battery ground cable.
2.
Disconnect signal switch harness wiring from chas-
sis wiring harness at multiple connector under in-
strument panel.
3.
Remove steering wheel assembly as outlined in
Steering, Section 9.
4.
Remove preload spring and cancelling cam.
5.
Remove directional signal lever screw and lever.
6. Push in hazard warning knob, unscrew and remove
knob.
7.
Remove lower trim cover retaining screws and
cover.
8. Remove retaining ring, thrust and wave washers
from upper end of shaft.
9. Cut wiring above connector.
10.
Remove three switch mounting screws, slide switch,
cover and upper bearing housing from column, pull-
ing wire through protector and escutcheon.
11.
To install replacement switch, assemble upper bear-
ing housing and turn signal switch into switch cover,
then feed wiring through escutcheon and protector
until switch can be positioned on mast jacket.
12.
With switch positioned on mast jacket, install three
switch mounting screws.
13.
Install thrust and wave washers and snap lock ring
in place.
14.
Install turn signal lever and hazard warning knob.
15.
Install cancelling cam and upper bearing preload
spring on steering shaft.
16.
Install steering wheel assembly.
NOTE:
Be sure directional signal switch is in
neutral position before installing wheel.
17.
Install connector on directional signal wiring har-
ness and connect to body harness connector.
CHEVROLET CHASSIS SERVICE
ELECTRICAL-BODY AND CHASSIS 12-44
WINDSHIELD WIPERS AND WASHERS
INDEX
Page
Wiper Transmission Assembly 12-44
Removal and Installation 12-44
Wiper Motor Assembly . 12-45
Removal and Installation . 12-45
Non-Depressed Park Wiper 12-46
Wiper Motor Assembly 12-47
Disassembly ....... 12-47
Inspection *...... 12-48
Assembly .. . .. . 12-48
Washer Pump Unit , 12-48
Removal and Installation 12-49
Disassembly and Assembly 12-49
Depressed Park 2-Speed Wiper - Chevrolet 12-49
Motor Section 12-51
WIPER TRANSMISSION ASSEMBLY
REMOVAL AND INSTALLATION (Fig. 59 and 60)
Chevrolet and Camaro
1.
Make certain motor is in park position, remove
wiper rod and blade assemblies from transmission
shaft.
2.
Remove plenum chamber ventilator grille.
3.
Loosen nuts retaining drive rod ball stud to crank
arm and detach drive rod from crank arm.
4.
Remove transmission retaining screws and lower
transmission and drive rod assemblies into plenum
chamber.
5. Remove transmission and linkage from plenum
chamber through cowl opening.
6. To install, reverse removal procedure.
Chevelle (Fig. 61)
1.
Make certain motor is in park position, remove
wiper arm and blade assemblies from transmission
shaft.
Gear Box Section . . 12-54
General Description. . . . , 12-56
Depressed Park 2-Speed Wiper - Corvette . 12-56
Service Operations
Wiper Trans-mission Assembly,
Removal and Installation . . ,
Wiper Motor Assembly ......
Motor Section .........
Gear Box Section
Washer Pump Section......
Pump Replacement ......
12-56
12-57
12-57
12-57
12-57
12-59
12-60
12-60
2.
Remove plenum chamber grille.
3.
Remove clip retaining transmission drive rod to
motor crank arm and detach drive rod from crank
arm.
4.
Remove transmission retaining screws, lower as-
sembly into plenum chamber, and remove unit from
chamber.
5. To install, reverse removal procedure.
Chevy II (Fig. 62)
1.
Make certain wiper motor is in park position, re-
move wiper arm and blade assembly from trans-
mission shaft.
2.
Remove special retainer clip securing transmission
linkage to wiper crank arm, remove linkage from
crank. Remove retainer clip securing left trans-
mission link to right transmission, remove link from
right transmission.
"
3. Remove two retaining screws securing transmission
Fig. 59 - Wiper and Motor Linkage—Chevrolet
Fig. 60 - Wiper and Motor Linkage—Camaro
CHEVROLET CHASSIS SERVICE MANUAL
ELECTRICAL-BODY AND CHASSIS 12-45
Fig.
61 - Wiper Motor and Linkage — Chevelle
to cowl (one side), remove transmission from under
dash.
4.
To install new transmission, reverse above
procedure.
NOTE:
Check and replace gasket if necessary.
Use waterproof cement to seal screw holes.
WIPER MOTOR ASSEMBLY
REMOVAL AND INSTALLATION
Chevrolet and Comoro (Fig. 59 and 60) .
1.
Make certain motor is in park position.
2.
Disconnect washer hoses and electrical connectors
from assembly.
3.
On Chevrolet models, remove plenum chamber side
cover and loosen huts retaining drive rod ball stud
to crank arm.
4.
Remove three motor retaining bolts and motor. On
Camaro models, pull wiper motor assembly from
Fig.
63 - Wiper Motor Removal — Chevy II
cowl opening and loosen nuts retaining drive rod ball
stud to crank arm.
5. Check sealing gaskets at motor and retaining bolts,
replace as necessary.
6. Position motor assembly to cowl and install retain-
ing bolts. On Camaro models, attach crank arm to
transmission rod.
CAUTION: Motor assembly must be in the
park position prior to installation to cowl. Do
Fig.
62 - Wiper Transmission Removal --. Chevy II
Fig.
64 - Non-Depressed Park Wiper
CHEVROLET CHASSIS SERVICE MANUAL
ELECTRICAL-BODY AND CHASSIS 12-46
Fig.
65 - Wiper Motor and Gear Box Assembly
1.
2.
3.
4.
5.
6.
Nut
Crank Arm
Seal Cap
Retaining Ring
Washer
Gear Box Cover
7.
8.
9.
Output Gear and
Shaft Assembly
Intermediate Gear
Wave Washer
10.
Gear Box Housing
11.
Brush Plate Assembly and
Mounting Brackets
12.
Brushes
13.
Wave Washers
14.
Flat Washers
15.
Armature
16.
Thrust Plug
17.
Frame and Field
18.
End Plate
19.
Tie Bolts (Two Required)
not install motor which has dropped or hung
from the drive link.
7.
Connect wiring and washer hoses to assembly.
8. Install plenum grille side cover (Chevrolet models
. only).
CheveKe (Fig, 61)
1.
Make certain motor is in park position.
2.
Disconnect washer hoses and all electrical
connectors.
3.
Remove three motor retaining bolts, carefully re-
move motor from firewall and detach clip retaining
wiper transmission drive arm to motor crank arm.
4.
To install, check sealing gaskets at motor and re-
taining bolts; replace as necessary.
5.
Attach motor crank arm to transmission rod and in-
stall clip. Position motor to cowl and install retain-
ing bolts.
CAUTION: Motor assembly must be in the
park position prior to installation to cowl. Do
not install motor which has dropped or hung
from the drive link.
6. Install washer hoses and electrical connections.
Chevy
II (Fig. 63)
1.
Make certain wiper motor is in park position.
2.
Working under instrument panel, remove special
retainer clip securing transmission linkage to motor
crank arm.
3.
Disconnect linkage, electrical connectors and washer
hoses.
4.
Remove three motor retaining bolts and remove
motor from opening cowl.
5.
To install, check sealing gaskets at motor and re-
taining bolts; replace as necessary.
6. Position motor to mounting location and install re-
taining bolts.
CAUTION: Motor assembly must be in the
.park position prior to installation to cowl. Do
not install motor which has dropped or hung
from the drive link.
7.
Attach crank arm to transmission rod and secure
with retaining clip.
8. Connect wiring harness and washer hoses.
NON-DEPRESSED PARK WIPER
CHEVELLE, CHEVY II AND CAMARO
The Type "E" two-speed electric windshield wiper
assembly (fig. 64) incorporates a non-depressed type
(blades park approximately 2" above windshield molding)
motor and gear train. The rectangular, 12 volt, com-
pound wound motor is coupled to a train consisting of a
helical drive gear at the end of the motor armature shaft,
an intermediate gear and pinion assembly, and an output
gear and shaft assembly. The crank arm is attached to
the output gear shaft.
Two switches, connected in parallel, control the start-
ing, stopping and parking of the Type "E" wiper motor.
The manually operated start, stop switch is located on
the instrument panel, while the cam operated park switch
is located in the wiper gear box.
CHEVROLET CHASSIS SEKV1CE MANUAL
ELECTRICAL-BODY
AND
CHASSIS
12-56
DEPRESSED PARK 2-SPEED WIPER
AND
WASHER
CORVETTE
GENERAL DESCRIPTION
The 2-speed windshield wiper
(fig. 91)
consists
of a
compound wound
12
volt dc motor and
a
gear box section
containing
the
gear mechanism
and
relay control.
The
motor armature
is
fitted with
a
worm gear which drives
the main gear assembly and crank arm.
The relay control, consisting
of a
relay coil, relay
armature
and
switch assembly,
is
located in the gear
box"
section and controls the starting and stopping of the wiper
through
a
latching mechanism (fig. 92).
An electric .washer pump
is
mounted
on the
gear box
section
of the
wiper
and is
driven by the wiper unit gear
assembly (fig. 93).
SERVICE OPERATIONS
WIPER MOTOR
AND
WASHER
PUMP ASSEMBLY
REMOVAL AND INSTALLATION
1.
Raise vehicle hood
and
disconnect, ground lead
at
battery.
2.
Remove engine distributor shielding
and
left bank
spark plug wire vertical shield.
3.
Disconnect left bank spark plug wire bracket-to-
manifold and position assembly to one side.
4.
Disconnect ignition resistor at firewall, then remove
washer pump inlet
and
outlet hose
at
pump valve
assembly.
5.
Remove engine distributor
cap
and position
to one
side;
then disconnect washer pump
and
motor
as-
sembly lead wires.
6. Remove glove
box
door
and
compartment. Refer
to
Section
1
for
removal procedure.
7.
Make sure wiper arms
and
wiper motor are both
in
the parked position; then remove
the
wiper trans-
mission retaining clip and disconnect both transmis-
sion and spacer from crank arm (fig. 93).
8. Remove four wiper motor-to-dash wall mounting
bolts and remove wiper motor from vehicle.
9. With
the aid of
an assistant position the wiper motor
to
the
dash wall
and
install the four motor mounting
bolts,
making sure motor assembly
is in
parked
position.
GEAR
BOX
SECTION
—<
MOUNTING
^*^
GROMMET
MOTOR
_/
SECTION
MOUNTING
/"""GROMMET
ARMATURE
END
PLAY
ADJUSTING SCREW
AND LOCK
NUT
P
^
CRANK
^_ /GROMMETS
RELAY
Fig.
92 -
Relay Control
10.
Position left transmission assembly, spacer
and
right transmission assembly
on
crank arm, then in-
stall
the
retaining clip
in the
groove
in
the crank
arm.
11.
Install glove compartment and door assembly. Refer
to Section
1
for
installation procedure.
12.
Install washer pump and motor assembly lead wires;
then install engine-distributor cap.
13.
Install washer pump inlet
and
outlet hose
to
pump
valve assembly, then install ignition resistor
to
firewall.
14.
Connect left bank spark plug wire bracket-to-mani-
fold, vertical shield and engine distributor shielding.
ROTOR
CAM. ^
CAM SLOT-~-*"'-*
WASHER PUMP^.
DRIVE
PIN
m
M
VALVE
— ASSEMBLY
i
Fig.
91 - Wiper Assembly—Corvette
Fig.
93 - Washer Pump
CHEVROLET CHASSIS SERVICE MANUAL
ELECTRICAL-BODY AND CHASSIS 12-57
15.
Connect positive lead to battery terminal, lower hood
and test wiper and washer assembly for proper
operation.
WIPER TRANSMISSION
REMOVAL AND INSTALLATION
1.
Remove wiper block and arm assembly from trans-
mission.
2.
Remove glove box door and compartment assembly.
Refer to Section 1 for removal procedures.
3.
Remove three transmission-td-cowl retaining
screws.
4.
Remove wiper transmission retaining clip and re-
move transmission from crank arm. Then remove
transmission through the glove box opening.
5.
Reverse removal procedure to install wiper trans-
mission.
Fig.
94 - Wiper and Trans Installed
WIPER ASSEMBLY REPAIRS
The overhaul procedures for the wiper are broken down
into three major areas: The motor section, gear box
section and washer pump section. Each section may be
serviced independently of the other.
MOTOR SECTION
Disassembly
1.
Remove the two motor tie bolts.
2.
Remove the armature end-play adjusting screw (fig.
91).
3.
Strike the steel case lightly with a mallet to partiaUy
loosen it from the die casting housing and motor
field.
4.
Insert a tool through the armature adjusting screw
opening and push against the end of the armature
shaft to back off the case. This will retain the ar-
mature commutator in position between the brushes
until ready to separate the armature from the case.
5.
To separate armature from case while still retaining
the brush springs and brushes in place fashion a
spring similar to that shown in Figure 95 and insert
behind the brush leads as shown.
Fig.
95 - Retaining Armature Brushes
6. Pull the armature out of the case and remove the felt
washer, thrust plate, and rubber thrust disc from the
case assembly bearing as required.
7.
The field windings are pressed into the gear housing
and further disassembly is not recommended; how-
ever, the field leads may be unsoldered from the
brush holders to remove the case.
8. Clean and inspect all parts.
Inspect both the field and armature for damage
due to overheating such as unsoldered electrical
connections.
Check that brush leads are firmly attached both
to the brushes and their connections at the brush
holders.
Check brushes for wear. If brushes are worn to
within 3/16" of brush lead, or pigtail, they should be
replaced.
Check contacts of circuit breaker shown at top of
Figure 95. Clean as required or file lightly to re-
move irregularities.
Inspect all leads from the brush and circuit
breaker plate for worn insulation or tjreaks.
If it was determined by inspection that brush re-
placement was required, proceed as follows:
a. Remove retainer installed during disassembly and
remove brush springs.
b.
Place a hot soldering iron against*brush lead con-
nection on brush holders, remove old bushes, and
nection on brush holders, remove old brushes,
and install new brushes.
c. To reinstall brushes in holders, compress spring
within holder and hold fully compressed with a
thin instrument inserted through the slot in the
brush holder. Then push brush into holder with
lead upward to project through slot in holder, hold
CHEVROLET CHASSIS SERVICE MANUAL