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
RADIATOR AND GRILLE 13-2
Fig.
1 - Radiator and Shroud - Chevrolet
3.
Remove fan.
4.
Remove bolts along top of radiator support, right and 4.
left radiator hold down clamps, and shroud center
bracket.
5. Remove horns and bolts retaining fan shroud to radi- 5.
ator support.
6. With helper, work radiator and fan shroud from vehi-
cle.
7. Reverse procedure to install. 6.
7.
GRILLE ASSEMBLY-CHEVROLET
Removal (Figs. 6 and 7)
1.
Raise hood and disconnect battery leads. 8.
2.
Remove bumper (Section 14).
3.
Remove bolts securing hood catch assembly to radi-
ator support, hood catch support and tie bar, and re- 9.
move hood catch from vehicle.
Remove screws attaching headlamp bezels to grille
reinforcements, fenders, and filler panel. Remove
bezels and headlamps from vehicle. •
Remove screws and rivits- from each fender trim
plate and remove fender trim plates with reinforce-
ments from vehicle. Refer to Figure 6 for attaching
hardware locations.
Remove rivits securing top of grille to tie bar.
Remove screw and rivits securing bottom" of grille to
filler panel and remove grille. If necessary, remove
nuts attaching name plate to grille and replace name
plate.
Remove screws attaching hood catch support to radi-
ator support and filler panel and remove catch sup-
port from vehicle. -
Remove screws attaching tie bar to fenders, radiator
CHEVROLET CHASSIS SEJMCE MANUAL
RADIATOR AND GRILLE 13-3
Fig.
2 - Radiator and Shroud - Chevelle
support, and grille reinforcements and remove tie
bar.
10.
Remove screws securing grille reinforcements to
filler panel and remove reinforcements.
11.
Remove filler panel attaching hardware and remove
filler panel from vehicle.
Repair
If tie bar, filler panel, hood latch support, or any other
components removed are undamaged, they may be used
for the new grille installation. Where rivets were re-
moved, make new attachments using screws and nuts,
patent clips, or rivets.
Installation
Install grille and related components following the re-
moval procedure in reverse order. Refer to torque
specifications in rear of manual for correct torque
values.
GRILLE ASSEMBLY-CHEVELLE (Fig. 8)
Removal
1.
Raise hood and disconnect battery leads.
2.
Remove screws from each headlamp bezel and re-
move headlamp bezels from vehicle. Remove head-
lamps.
CHEVROLET
Ch
SERVICE MANUAL
RADIATOR
AND
GRILLE
13-4
Fig. 3 - Radiator and Shroud - Chevy II
3.
Remove screws and nuts attaching grille extensions
to fenders and remove grille extensions.
'
4. Remove rivets attaching top of grille to tie bar.
5.
Remove screws attaching hood latch plate to tie bar,
catch support bracket, and radiator support and re-
move latch plate from vehicle.
6. Remove rivets securing grille reinforcements to tie
bar and filler panel and remove reinforcements.
7. Remove screws attaching tie bar to fenders, hood
catch
•
support, and radiator support and remove tie
bar.
8. Remove bumper (Section 14).
9. Remove rivet and screw securing hood catch support
to filler panel and radiator support and remove catch
support from vehicle.
10.
Remove rivets securing bottom of grille to filler
panel and remove grille.
11.
Remove attaching hardware securing filler panel and
filler panel reinforcements to fenders, fender
braces, and radiator support, and remove filler
panel.
12.
If necessary, remove nuts attaching name plate to
grille and replace name plate.
Repair
If any components removed are undamaged, they may
be used for the new grille installation. Where rivets
were removed, make new attachments using screws and
nuts,
patent clips, or rivets.
Installation
Install grille and related components following the re-
moval procedure in reverse order. Refer to torque spec-
ifications in rear of manual for correct torque values.
GRILLE ASSEMBLY-CHEVY
I! (Fig. 9)
Removal
1. Raise hood and disconnect battery leads.
2.
Remove bumper (Section 14).
3.
Remove screws and nuts securing hood catch assem-
bly to radiator support, grille, and catch support
bracket and remove catch from vehicle.
4.
Remove screws from each headlamp bezel and re-
move bezels from vehicle. Remove headlamps.
5.
Remove screws securing hood catch support to filler
panel and radiator support and remove catch support.
CHEVROLET CHASSIS SERVICE MANUAL
RADIATOR AND GRILLE 13-5
Fig.
4 - Radiator and Shroud - Corvette
attaching top of grille to left and GRILLE ASSEMBLY—CORVETTE (Fig. 10)
10.
Remove screws
right supports.
Remove rivets securing bottom of grille to filler
panel, support assemblies, and reinforcements and
remove grille from vehicle.
If necessary, remove rivets, screws, and retainers
securing reinforcements and name plate to grille and
replace reinforcements and name plate.
Remove screws attaching left and right supports and
remove supports.
Remove attaching hardware securing filler panel and
remove filler panel from vehicle.
Repair
If any components removed are undamaged, they may
be Used for the new grille installation. Where rivets
were removed, make new attachments using screws and
nuts,
patent clips, or rivets.
Installation
Install grille and related components following the re-
moval procedure in reverse order. Refer to torque spec-
ifications in rear of manual for correct torque values.
Removal
1.
Raise front of vehicle.
2.
Remove front bumper (Section 14).
3.
Remove grille retaining screws.
4.
Remove grille from vehicle.
Installation
Install grille and related components following the re-
moval procedure in reverse order. Refer to torque spec-
ifications in rear of manual for correct torque values.
GRILLE ASSEMBLY-CAMARO (Fig. 11)
NOTE:
If necessary to remove retractable
headlamp cover only, refer to Section 12.
Removal
1.
Raise hood and disconnect battery leads and remove
battery.
2.
Remove bumper (Section 14).
3.
Remove screws securing hood catch assembly to
CHEVROLET CHASSIS SERVICE MANUAL
RADIATOR AND GRILLE 13-6
VIEW A
VIEW B
V-8 ENGINE
RADIATOR
FAN GUARD
(L-6 ENGINE)
VIEW
Fig.
5 - Radiator and Shroud - Camaro
grille header panel, catch support bracket, and radi-
ator support and remove hood catch.
Remove screws from each headlamp bezel and re-
move bezels from vehicle. Remove headlamps.
Remove hardware attaching hood catch support to
radiator support, valance panel, and lower grille
and remove catch support from vehicle.
Disconnect parking lamps. Remove rivets securing
center grille to upper and lower grilles and remove
center grille from vehicle. If necessary, replace
name plate.
Remove screws and rivets securing grille header
panel to fenders and upper grille and remove header
panel.
Remove hardware attaching upper and lower grilles
to vehicle and remove upper and lower grilles.
Remove screws attaching valance panel to fenders,
and fender extensions and retractable headlamp door
assemblies if so equipped, and remove valance panel
from vehicle.
10.
If vehicle is equipped with retractable headlamp cov-
ers,
disconnect electrical plugs. Remove screws at-
taching headlamp bracket assemblies to radiator
support and remove assemblies from vehicle.
Repairs
If any components removed are undamaged, they may
be used for the new grille installation. Where rivets were
removed, make new attachments using screws and nuts,
patent clips, or rivets.
Installation
Install grille and related components following the re-
moval procedure in reverse order. Refer to torque spec-
ifications in rear of manual for correct torque values.
CHEVROLET CHASSIS SERVICE MANUAL
SPECIFICATIONS 25
BODY AND CHASSIS ELECTRICAL
SECTION
12
LAMP USAGE
CANDLE
POWER
BULB
NUMBER
Headlamp Unit
Chevrolet, Chevelle & Corvette
Outer - High Beam
Outer - Low Beam
Inner -• High Beam only
Chevy H
High Beam . .
Low Beam
Parking Lamp and Directional Signal
All Exc. Camaro
Camaro
Tail, Stop and Directional Signal (Exc. Bel Air)
Backing Lamp ••...,
Instrument Illumination Lamps
Chevrolet & Camaro ,
Chevelle and Chevy n
Corvette
Temperature Indicator
Chevrolet & Camaro
Chevelle and Chevy II .............
Oil Pressure Indicator
Chevrolet & Camaro .............
Chevelle and Chevy II
Generator Indicator
Chevrolet & Camaro .
Chevelle and Chevy n ,
Hi-Beam Indicator
Chevrolet & Camaro <
Chevelle and Chevy II
Corvette , . • . ,
Directional Indicator
Chevrolet & Camaro
Chevelle & Chevy II . .
Corvette . .
Cigarette Lighter Lamp
Corvette .
Ignition Lock Lamp
Chevrolet . . .
Corvette . . .
Heater or A/C Control Panel
Chevrolet, Chevelle, Chevy n & Camaro . . .
Corvette . . .
Glove Box Lamps
Chevrolet, Chevelle, Chevy n & Camaro . . .
Corvette . . . . .
Dome and Courtesy Lamps
Cartridge Type (AU)
Bayonet Type (Exc. Corvette) . . .
Corvette ,
Convertible . .
37 1/2 Watts
55 Watts
37 1/2 Watts
55 Watts
45 Watts
4-32
4-32
4-32
Special Fiber
1
2
3
2
3
12
6
6
6
Optic
4002
4002
4001
6012
1157
1034-A
1157
1156
194
1895
.
1816
194
1895
194
1895
194
1895
194
1895
1445
194
1895
1816
1445
Wiring
1445
1895
1893
1895
1893
211
89,
212
90
631
CHEVROLET CHASSIS SERVICE MANUAL
SPECIFICATIONS 26
LAMP USAGE (Cont'd.)
CANDLE
POWER
1
6
4
2
3
2
2
3
2
3
15
15
BULB
NUMBER
1445
212
67
1893
1816
194
1895
1816
257
1816
1003
93
Seat Separator-Compartment Lamp . . . . .
-Courtesy Lamp •
License Plate Lamp . .
Radio Dial Lamp
Chevrolet, Chevelle, Chevy n & Camaro
Corvette
Brake Alarm Lamp
. Chevrolet & Camaro . . .... . .
Chevelle & Chevy n . . . . .'. ;v . . . .
Corvette . . . . . . . .
Headlamp Mqtor Warning Lamp (Flashing) .
Clock Lamp (Corvette) .''> ....
Luggage Compartment Lamp. . ... . . . •
Underhood
FUSES AND CIRCUIT BREAKER
A circuit breaker in the light control switch protects
the headlamp circuit, thus eliminating one fuse. A
separate circuit breaker protects the power window,
seat and top circuits. On Corvettes the headlamp motor
circuit is also protected by a separate circuit breaker.
Where current load is too heavy, the circuit breaker
rapidly opens and closes, protecting the circuit until
the cause is found and eliminated.
louses located in the Fuse Panel under the instrument panel are:
Wiper (Chevrolet, Chevelle, and "F" Car) 3AF/AGC 20 Amp.
Back-up Lamp and Gauges. . . 3AG/AGC 10 Amp.
Heater - Air Conditioning 3AG/AGC 25 Amp.
Radio 3AG/AGC 10 Amp.
Radio - Wiper (Chevy II and Corvette) 3AG/AGC 20 Amp.
Instrument Lamps 3AG/AGC . 4 Amp.
Stop and Tail Lamps ........ t 3AG/AGC 20 Amp.
Clock, Lighter, Courtesy Lamps, and Hazard Warning 3AG/AGC 20 Amp.
In-Line Fuses:
Air Conditioning High Blower Speed Fuse located in wire running
from horn relay to A/C Relay
Comforton and Four Season SAE 30 Amp.
Universal & All Weather (Chevy H) SAE 20 Amp.
Fusible Links: ,
Pigtail lead at battery positive cable (except Corvette) 14 gage brown wire
Molded splice at Solenoid "Bat" terminal (Corvette only) 14 gage brown wire
Molded Splice Located at the horn relay 16 gage black wire
Molded splice in Voltage Regulator #3 terminal wire 20 gage orange wire
Molded splice in Ammeter circuit (Both sides of meter) 20 gage orange wire
CHEVROLET CHASSIS SERVICE MANUAL