warning CHEVROLET CAMARO 1967 1.G Chassis User Guide

ELECTRICAL-BODY AND CHASSIS 12-2

FJg.
1 - Fuse Panel Assembly

All power window and tailgate circuits require the igni-

tion switch to be "ON" to open or close the windows un-

like past model designs which were operated independ-

ently of the ignition switch.

The windshield wiper and washer switch is new in that

washer button in the center of the knob has been deleted
and its function will be accomplished by pushing the knob.

A set screw is used to retain the knob to the shaft.

In addition to fuses, the wiring harness incorporates

fusible links to protect the wiring. Links are used rather

than a fuse in wiring circuits that are not normally fused,

such as the ignition circuit. Fusible links in the Chevro-

let wiring are four gauge sizes smaller than the cable it

is designed to protect. The links are marked on the

insulation with wire gauge size because of the heavy insu-

lation which makes the link appear a heavier gauge than it

actually is.

Engine compartment wiring harness incorporate sev-

eral fusible links. Each link is identified with its gauge

size.
A fusible link is a length of special wire (normally

four wire gauges smaller than the circuit it is protecting)

used in wiring circuits that are not normally fused, such

as the ignition circuit. The same size wire with a spe-

cial hypalon insulation must be used when replacing a

fusible link.

The links are:

1.
The pigtail lead at the battery positive cable (except

Corvette) is a 14 gauge, brown fusible link protecting

the 10 gange battery charging circuit. This wire is

an integral part of the battery cable assembly and

servicing requires replacing the complete battery

cable assembly. On Corvette models this link is

installed as a molded splice at the solenoid "Bat"

terminal and servicing requires splicing in a new

link.

2.
A 16 gauge black fusible link is located at horn relay

to protect all unfused wiring of 12 gauge or larger.

It is a serviceable piece with an in-line connector

and is not integral with the wiring harness.

3.
The generator warning light and field circuitry (16

gauge wire) is protected by a fusible link (20 gauge

orange wire) used in the "battery feed to voltage

regulator #3 terminal" wire. The link is installed

as a molded splice in the generator and forward lamp

harness and is serviced by splicing in a new 20 gauge

wire as required.

4.
The ammeter circuit on all models is protected by

two orange, 20 gauge wire fusible links installed as

molded splices in the circuit at the junction block or

the solenoid "Bat" terminal (Corvette only) and at the

horn relay. Each link is serviced by splicing in a

new 20 gauge wire as required.

The wiring harnesses use a standarized. color code

common to all Chevrolet vehicles. Under the color code,

the color of the wire designates a particular circuit. The

harness title indicates the type of harness, single of mul-

tiple wire, and also describe the location of the harness.

The body harness is a flat, solid wire assembly and is

routed through the vehicle near the center of the body.

Composite wiring diagrams (figs. 104 thru 124) are in-

cluded at the end of this section.

MAINTENANCE AND ADJUSTMENTS

Maintenance of the lighting units and wiring system

consists of an occasional check to see that all wiring

connections are tight and clean, that the lighting units are

tightly mounted to provide good ground and that the head-

lamps are properly adjusted. Loose or corroded con-

nections may cause a discharged battery, difficult start-

ing, dim lights, and possible damage to generator and

regulator. Wire harnesses must be replaced if insulation

becomes burned, cracked, or deteriorated. Whenever it
is necessary to splice a wire or repair one that is bro-

ken, always use solder to bond the splice. Always use

rosin flux solder on electrical connections. Use insulat-

ing tape to cover all splices or bare wires.

When replacing wires, it is important that the correct

size be used. Never replace a wire with one of a smaller

size.

Each harness and wire must be held securely in place

by clips or other holding devices to prevent chafing or

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-21

2.
Remove ash tray, retainer attaching screws and

retainer.

3.
Remove Air Conditioning distributor
duct'
retaining

screws and duct.

4.
Remove heater and/or Air Conditioning control panel

assembly retaining screws and push panel assembly

from console.

NOTE:
If interference between control panel

and radio is encountered, loosen radio retaining

nuts.

5. Remove radio control knobs, bezels and retaining

nuts.

6. Disconnect radio wiring harness and antenna lead-in.

7. Remove radio rear brace attaching screw and re-

move ra(Jio from vehicle.

8. Remove ignition switch bezel nut using Tool J-7607

and push switch rearward.

9. Disconnect cigarette wiring connector.

10.
Remove cigarette lighter retainer and lighter as-

sembly from console.

11.
To install, reverse removal procedure.
Fig.
35 - Cigarette Lighter — Chevelle

CHEVROLET INSTRUMENTS AND GAUGES

INDEX

Page

General Description 12-21

Service Operations 12-22

Instrument Cluster........................ 12-22

Instrument Cluster Lamps 12-22

Printed Circuit .
* •
12-22

Speedometer 12-22

Speedometer Cable 12-23

Fuel Gauge 12-23
Page

Clock 12-24

Tachometer 12-24

Ammeter . . 12-24

Temperature Gauge 12-24

Oil Pressure Gauge 12-24

Oil Pressure Indicator 12-24

Generator Indicator 12-26

Temperature Indicator 12-26

GENERAL DESCRIPTION

The standard instrument cluster on all models contains

seven circular housings consisting of: a speedometer;

fuel gauge; oil pressure, generator and temperature indi-

cators; right and left directional signal indicators; brake

warning and high beam indicators; and includes a clock

on deluxe models. An optionally available instrument

cluster provides special instrumentation which includes

in addition to the speedometer and clock: a tachometer;

fuel, oil pressure, ammeter and engine temperature

gauges; which replace the standard fuel gauge and indi-

cator lights. The brake warning indicator is relocated

to the tachometer dial face and the high beam and direc-

tional indicators are positioned in the speedometer dial

face.

Instrument cluster removal is recommended before at-

tempting to service the printed circuit and gauges even

though some units may be accessible from behind the

cluster. Limited working space under the instrument

panel increases the possibility of electrical malfunctions

due to poor connections, and damaged or improperly in-

stalled printed circuit. The printed circuit is service-

able but not repairable and requires complete
replacement.

The brake warning light serves a dual purpose. It

functions as an indicator when the parking brake is ap-

plied and also warns if a malfunction (loss of hydraulic

pressure) should occur in the brake system. The two

separate switches, which provide the signal to operate the

indicator, are located at the parking brake support and in

the hydraulic brake line at the master cylinder. Service

of the brake pressure, differential switch unit at the

master cylinder is described in Section 5 of this manual.

All indicator and cluster illumihating lamps may be

replaced without removing the cluster from the vehicle.

The bulbs are installed in plastic holders which lock into

the cluster housing and make contact with the printed

circuit. An instrument lamp is used to illuminate the

ignition switch. A special fibre optic lucite wiring

transmits light from the lamp to the switch.

Regular maintenance is not required on the instrument

cluster or its components other than maintaining clean,

tight electrical connections, replacing defective parts and

keeping the speedometer cable properly lubricated.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-22

SERVICE OPERATIONS

INSTRUMENT CLUSTER

Removal and Installation (Figs. 36 thru 40)

I. Disconnect battery ground cable.

2:
Remove four screws retaining instrument bezel to

top edge of instrument console. Disengage tabs on

bezel lower section from clips on instrument console

and remove bezel.

3.
Protect mast jacket to prevent scratching when re-

moving cluster assembly.

4.
Remove eight screws securing leading edges of in-

strument cluster to console and pull cluster forward

from console opening.

5. Reaching behind cluster disconnect speedometer ca-

ble,
chassis harness connector, clock and speed

warning device connections (if so equipped) at rear of

cluster.

NOTE:
On models- with gauge pack, disconnect

oil pressure line also.

6. When all disconnects are made, remove cluster as-

sembly from vehicle.

7. To install, position cluster assembly to console

opening and connect speedometer cable, chassis

harness connector and other electrical connections

as required.

8. Position cluster in console opening and install eight

retaining screws.

NOTE:
Make sure ground strap between

cluster case and center right lower attachment

is properly installed.

9. Engage tabs on instrument bezel with clips on con-

sole and position bezel in console opening, then in-

stall four retaining screws.

10.
Install speed warning device control attaching nut and

knob,
if so equipped.

II.
Connect battery ground cable and check operation of

cluster assembly.

Fig. 36 - Instrument Cluster Installation — Chevrolet
Fig. 37 - Speed Warning Device

INSTRUMENT CLUSTER LAMP REPLACEMENT

(Figs.
38 and 39)

1.
Rotate socket counterclockwise to remove from rear

of cluster housing.

2.
To remove bulb, if socket is black color, pull bulb

straight out. If socket is gray color, depress and

rotate bulb, then pull out.

3.
Install replacement bulb in socket, pressing inward

to lock in place.

4.
Insert socket into housing, with lugs entering notches

in case, and rotate clockwise to lock in place.

PRINTED CIRCUIT REPLACEMENT (Figs. 38 and 39)

1.
Remove instrument cluster as previously described

in this section.

2.
Remove all cluster illuminating and indicator lights

from cluster housing.

3.
Remove fuel gauge and clock terminal nuts securing

printed circuit to housing.

4.
Remove four hex head screws retaining printed cir-

cuit to the cluster housing and remove the printed

circuit. . .

5. To install, reverse removal procedure.

CAUTION:. The retaining screws and terminal

nuts are part of the grounding circuit and must

be installed to provide the proper ground con-

nections for the printed circuit.

SPEEDOMETER
REPLACEMENT

1.
Remove instrument cluster as previously described

in this section.

2.
Remove screws retaining rear cover to the cluster

assembly. Bend ground strap away from cover and

remove cover.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-26

•
Low oil
pressure

• High engine temperature

• Defective wiring
or
switch

connector from sender

in block above starter
on

and
at
left front
of
distributor
on V-8
Sending Unit Replacement

1.
Disconnect wiring harness

unit terminal (located

L-6 engines

engines).

2.
Remove sender unit using Tool J-21757
or 12
point

socket, replace with
new
unit
and
check operation.

GENERATOR INDICATOR

1.
Ignition
on,
Engine
not
Running
and
Telltale Light

Off.

• Indicator bulb burned out, replace bulb.

• Open circuit
or
loose connection
in the
telltale

light circuit.

2.
telltale Light Stays
on
after Engine
is
Started.
If indicator light does
not go out at
engine idle

speed, refer
to
Charging Systems under Engine

Electrical, Section
6Y.

TEMPERATURE (COOLING SYSTEM) INDICATOR

The temperature indicator circuit consists
of two re-

motely located units, indicator gauge
and
engine sender

unit.
The
indicator gauge, located
in the
instrument

panel, consists
of a
red light which will indicate
an
over-

heated engine condition.

Engine Sender Unit Replacement

1.
Drain engine cooling system
to a
level below unit.

2.
Remove sender unit (located
in the
inlet manifold

near water pump housing
on V-8
engines and
in the

cylinder head near
an
exhaust port
oh L-6
engines)

and replace with new unit.

3.
Refill cooling system
and
check operation
of
unit.

CHEVELLE INSTRUMENTS AND GAUGES

INDEX

Page

General Description
* *
i2-26

Service Operations
12-26

Instrument Panel
12-26

Instrument Cluster.
12-26

Fuel Gauge and/or Ammeter
12-27

Clock,
i 12-27

Speedometer
12-27
Page

Speedometer Cable
.
. 12-27

Temperature Gauge
12-29

Oil Pressure Gauge
12-29

Indicator Lights.
. 12-29

Oil Pressure Indicator
12-29

Generator Indicator
. . 12-29

• Temperature Indicator
12-29

GENERAL DESCRIPTION

The Chevelle instrument cluster assembly consists
of:

a speedometer;
a
fuel gauge;
a
generator,
an
engine
tem-

perature and an
oil
pressure indicator lamp, and includes

a clock
on
deluxe models.
On
super sport models,
am-

meter, coolant temperature
and oil
pressure gauges
re-

place
the
appropriate indicator lights. Except
for the

speedometer,
all of the
indicator lamps, instruments
and

gauges
of
these clusters may
be
serviced without remov-

ing
the
instrument cluster assembly from
the
vehicle.

In addition
to the
instrument indicator lamps,
a
brake

warning lamp
is
included
in the
cluster
as
standard

equipment.
The
indicator
is
connected
to the
parking
brake
and
brake pressure differential switches
and

serves
a
dual function.
It
lights when the parking brake

is applied
and
also when
the
brake pedal
is
applied,
if a

malfunction should occur
in the
brake system
due to a

loss
of
hydraulic pressure. Servicing
of the
hydraulic

pressure differential switch
is
covered
in
Section
5 of

this manual.

Regular maintenance
is not
required on the instrument

cjLuster
or its
components other than maintaining dean

and tight electrical connections, replacing defective parts

and keeping
the
speedometer cable properly lubricated.

SERVICE OPERATIONS

INSTRUMENT PANEL ASSEMBLY

INSTRUMENT CLUSTER (Figs.
41
thru
44)

Removal

1.
Disconnect battery ground cable.

2.
Remove steering coupling bolt and disconnect steer-

ing shaft from coupling.

3.
Loosen mast jacket lower clamp.

4.
Remove
air
conditioning center distributor duct
(if

so equipped).

5. Remove radio rear support bracket screw.

6. Remove mast jacket upper support clamp and retain-

ing bolts from lower support (refer
to
Section
9,

Steering).
CAUTION: Cover mast jacket
and
parl

brake handle with
a
suitable material
to
prevc

scratching.

7.
Disconnect speedometer cable
at
rear
of
cluster

housing
and
speed warning control knob
at
panel
(if

so equipped).

8. Remove instrument panel retaining screws (nine

upper and five lower).
.

9. Working under the console remove four lower retain-

ing screws from instrument cluster housing.

10.
Pull instrument panel assembly from console and
lay

forward on mast jacket.

11.
Disconnect wiring harness, cluster lamps and wiring

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-27

Fig.
41 - Instrument Panel Installation — Chevelle

terminals from rear of cluster assembly (figs. 43

and 44).

12.
Remove four screws retaining upper section of dus-

ter housing to panel and remove cluster from the in-

strument panel and to a suitable working area for

necessary service (fig. 42).

Installation

1.
Position cluster assembly to rear of panel and install

four upper retaining screws.

2.
Connect cluster lamps, wiring connectors and wiring

harness assembly to the cluster assembly.

3.
Position instrument panel assembly into console

(hold panel at center and install center screws) and

install upper and lower retaining screws.

NOTE:
At this point temporarily reconnect

battery and check operation of cluster.

4.
Working under the console, install four lower screws

retaining lower section of cluster cover to rear of

panel.

5. Install radio brace screw at rear of radio.

6. Connect speedometer cable to speedometer and speed

warning device control knob.

7. Install A/C distributor duct and connect A/C hoses to

duct (if so equipped).

8. Install mast jacket upper support clamp.

9. Position steering shaft in the steering coupling and

install retaining bolt.

10.
Tighten mast jacket lower clamp (refer to Steering,

Section 9 for spring tension adjustment).

11.
Connect battery ground cable.

FUEL GAUGE AND/OR AMMETER

REPLACEMENT

1.
Disconnect battery ground cable.

2.
On air conditioned models, disconnect hose and re-

move air outlet from panel.

3.
Disconnect wiring connectors and cluster lamps from

rear of gauge assembly.

4.
Remove mounting plate retaining screws (3) and re-
move fuel gauge from rear of cluster housing.

5. Remove terminal nuts (3) securing gauge to template

and replace gauge.

6. To install, reverse the removal procedure.

CLOCK REPLACEMENT

1.
Disconnect battery ground cable.

2.
Remove clock set shaft knob retaining nut and knob.

3.
Disconnect wiring connector at clock terminal and

cluster lamp from clock housing. On A/C models,

disconnect hose from air distributor duct.

4.
Remove two screws retaining clock housing to

cluster cover and remove clock.

5. To install, reverse removal procedure.

SPEEDOMETER REPLACEMENT

1.
Disconnect battery ground cable.

2.
Remove instrument cluster assembly as previously

outlined in this section.

3.
Remove screws (8) attaching cover to rear of cluster

housing.

4.
Remove two screws attaching speedometer assembly

to cluster cover and carefully remove speedometer

head.

NOTE:
Servicing of the speedometer assembly

should be performed by an authorized
AC
speed-

ometer service station.

5. To install, reverse removal procedure.

SPEEDOMETER CABLE

Replacement or Lubrication

1.
Disconnect the speedometer cable from the speedom-

eter head. Remove the old cable by pulling it out

from speedometer
, end
of conduit.

NOTE:
If old cable is broken it may be neces-

sary to remove lower piece from transmission

end of conduit.

2.
Lubricate the lower 3/4 of cable with speedometer

cable lubricant and push the cable into the conduit.

Connect the upper end to the speedometer head and

road test vehicle for proper speedometer operation.

Fig.
42 - Instrument Cluster Installation

CHEVROLET CHASSIS SEtVKE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-29

Fig.
43b - Speed Warning Device

TEMPERATURE AND/OR OIL PRESSURE

GAUGE

1.
Disconnect battery ground cable.

2.
Remove ash tray and ash tray retainer.

3.
Disconnect A/C hose from the distributor duct.

4.
Disconnect wiring connectors and lamp bulbs from

rear of gauge.

5. Disconnect oil pressure pipe fitting from rear of oil

pressure gauge.

6. Remove (3) screws retaining gauge assembly to

cluster cover and disengage unit from cover.

7. Remove (4) retaining nuts and remove gauge from

template.

8. To install, reverse removal procedure.

INDICATOR LIGHT REPLACEMENT

To replace any indicator or cluster bulb, unsnap the

proper socket from rear of instrument cluster, remove

and replace bulb, and reinsert unit into rear of cluster

housing.
OIL PRESSURE INDICATOR

If the light does not come on when the ignition switch is

turned on, or if the light comes on and remains on after

the engine is started, one or more the following condi-

tions is indicated:

• Low oil pressure

• Defective wiring or switch

• High engine temperature

Switch Replacement

1.
Disconnect wiring harness connector from sender

unit terminal (located in block above starter on L-6

engines and at left front of distributor on V-8

engines).

2.
Remove sender unit using Tool J-21757, replace with

new unit, and check operation.

GENERATOR INDICATOR

Ignition on, Engine not Running and

Telltale Light Off

1.
Indicator bulb burned out, replace bulb.

2.
Open circuit or loose connection in the telltale light

circuit.

Telltale Light Stays on after Engine is Started

If indicator light does not go out at engine idle speed,

refer to' Charging Systems under Engine Electrical,

Section 6Y.

TEMPERATURE
(COOLING
SYSTEM)
INDICATOR

The temperature indicator circuit, consists of two re-

motely located units, indicator gauge and engine sender

unit. The indicator gauge on all models uses a single

red light to indicate an overheated engine condition.

Engine Sender Unit Replacement

1.
Drain engine cooling system to a level below unit.

2.
Remove sender unit (located in the inlet manifold

near water pump housing on V-8 engines and in the

cylinder head near an exhaust port on L-6 engines)

and replace with new unit.

3.
Refill cooling system and check operation of unit.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-31

CHEVY II INSTRUMENTS AND GAUGES

INDEX

Page
Page

General Description -.....
12-31

Service Operations.
12-31

Instrument Panel
. 12-31

Instrument Cluster
12-31

Fuel Gauge
12-32

12-32
Clock,
Speedometer
12-34

Speedometer Catte
12-34

Indicator Lights
12-34

Oil Pressure Indicator
12-34

Generator Indicator
12-34

Temperature Indicator
12-34

GENERAL DESCRIPTION

The Chevy
n
instrument cluster assembly consists
of:

a speedometer;
a
fuel gauge;
a
generator, temperature

and
oil
pressure indicator lamps, and includes
a
clock
on

deluxe models. Except
for the
speedometer,
all of the

cluster lamps, instruments and gauges
of
the cluster
may

be serviced without removing
the
instrument cluster
as-

sembly from
the
console.

In addition
to the
instrument indicator lamps,
a
brake

warning lamp
is
included
in the
cluster
as
standard

equipment.
The
indicator
is
connected
to
thfc parking

brake and brake pressure differential switches andserves
a dual function.
It
lights when
the
parking brake
is ap-

plied
and
also when
the
brake pedal
is
applied,
if a mal-

function should occur
in the
brake system
due to a
loss
of

hydraulic pressure. Servicing
of the
hydraulic pressure

differential switch
is
covered
in
Section
5 of
this manaul.

Regular maintenance
is not
required on
the
instrument

cluster
or its
components other than r^Mfitftl^i^g clean

and tight electrical connections, replacing defective parts

and keeping
the
speedometer cable properly lubricated.

SERVICE OPERATIONS

INSTRUMENT PANEL

INSTRUMENT CLUSTER

Removal
and
Installation {Figs.
45
thru
48)

1.
Disconnect battery ground cable.

2.
Remove mast jacket upper support clamp (refer
to

Steering, Section
9, for
complete procedure
on low-

ering jacket) and lower steering column.

NOTE:
Apply protective material
to the
mast

jacket
to
prevent damage
to the
painted surfaces.
3.
Disconnect retaining collar securing speedometer

cable
to
speedometer head.

4.
Remove screws retaining cluster
to
console.

5. Pull cluster forward
of
console opening and discon-

nect
all
wiring
and
lamp connections. Remove

cluster from vehicle.

CAUTION:
Do not
pull cluster outward further

than slack
in
wiring harness will allow, other-

Fig.
45-
Instrument Cluster Installation
—
Chevy
II

Fig.
46 -
Speed Warning Device

CHEVtOtET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-36

CAMARO INSTRUMENTS AND GAUGES

INDEX

Page

General Description
12-36

Service Operations
12-36

Instrument Cluster
. . . 12-36

Instrument Lamps
12-36

Printed Circuit
12-36

Fuel Gauge
12-37

Tachometer
. . 12-37

Seat Separator Instrument Console
12-37
Page

Fuel Gauge
12-37

Ammeter
12-37

Temperature Gauge
12-37

Oil Pressure Gauge
. 12-37

Fuel Warning Unit
12-37

Clock.
... 12-37

Oil Pressure Indicator
12-37

Generator Indicator
12-38

Temperature Indicator
12-38

GENERAL DESCRIPTION

The standard Camaro instrument cluster assembly con-

sists
of two
circular units which house
the
speedometer

and fuel gauge assemblies.
The oil
pressure, left-hand

directional
and
brake warning indicators
are
located
in

the face
of the
speedometer bezel while generator,
tem-

perature
and
right-hand directional indicators are grouped

with
the
fuel gauge unit.
The
high beam indicator
is

located between
the
cluster bezels.

A special instrumentation package
is
available with
the

eight-cylinder engine
and
center floor console combina-

tion.
The
special cluster includes:
a
clock; coolant

temperature,
oil
pressure, fuel
and
ammeter gauges,

mounted forward
on the
seat separator console;
a ta-

chometer
in the
right circular housing
of the
dash
in-

strument cluster; and
a low
fuel level indicator replacing

the
oil
pressure indicator lamp
in the
instrument cluster.

The instruments
and
gauges,
may be
serviced only

after
the
instrument cluster
is
removed from
the
vehicle.

Indicator
and
cluster lamps except
for the
high beam

indicator
may be
replaced without removing
the
cluster

assembly. Partial cluster removal
is
necessary when

replacing
the
high beam indicator due
to its
proximity
to
the upper brace
rod
anchor plate.
The
bulbs
are in-

stalled
in
plastic sockets which lock into
the
cluster

housing and make contact with
the
printed circuit.

A
low
level fuel warning system
is a
special feature

available with
the
floor console gauge pack. This
sys-

tem includes
an
indicator lamp
in the
dash cluster and
a

semi-conductor unit senses
the
change
in
electrical
re-

sistance
of the
fuel system circuitry
as
variations
in

fuel level occur.
The
sensing device
is
replaced
as a

unit
if
found defective.

The brake warning light serves
a
dual purpose.
It

functions
as an
indicator when
the
parking brake
is ap-

plied
and
also
if
there
is a
malfunction (loss
of
hydraulic

pressure)
in the
brake system. Switches which provide

the signal
to
operate
the
light
are
located
at the
parking

brake assembly
and at the
brake master cylinder
in the

hydraulic lines. Service
of the
brake pressure differ-

ential switch unit
is
covered
in
Section
5 of
this manual.

Regular maintenance
is not
required on
the
instrument

cluster
or its
components other than maintaining clean,

tight electrical connections, replacing defective parts

and keeping
the
speedometer properly lubricated.

SERVICE OPERATIONS

INSTRUMENT CLUSTER (Figs.
50
thru
53)

Removal
and
Installation

1.
Disconnect battery ground cable.

2.
Remove mast jacket lower support screws
at toe
pan.

3.
Remove mast jacket upper support bolts
and
allow

steering wheel
to
rest
on
seat cushion.

CAUTION: Both supports must
be
detached
to

prevent distortion
of
mast jacket.

4.
Remove cluster attaching screws from face
of
panel

and partially remove assembly from console opening.

5. Reaching behind cluster assembly, disconnect speed-

ometer cable, speed warning device
(if so
equipped
-

Fig.
51) and
chassis harness connector
at
rear
of

panel.

6. Remove assembly from console opening to
a
suitable

bench area
for
required service operations.

7.
To
install, reverse removal procedure.

INSTRUMENT CLUSTER LAMP REPLACEMENT

1.
Turn bulb holder counterclockwise
and
pull
out to

remove from
the
cluster housing.
2.
Pull bulb straight out
to
remove from socket.

3.
Press replacement bulb inward
to
lock
in
socket.

4.
Insert lamp assembly into housing, with lugs
on

holder entering notches
in
housing,
and
turn clock-

wise
to
lock
in
place.

PRINTED CIRCUIT REPLACEMENT

1.
Remove instrument cluster
as
previously described

in this section.

2.
Remove
all
cluster illuminating and indicator lamps

from housing.

3.
Remove fuel gauge terminal nuts
or
tachometer
re-

taining nuts securing printed circuit
to
housing.

4.
Remove four
hex
head screws retaining printed
cir-

cuit
to the
cluster housing
and
remove circuit from

housing.

5.
To
install, reverse removal procedure.

CAUTION:
The
retaining screws
are
part
of

the grounding circuit
and
must
be
installed
to

provide proper connections
for the
printed
eir-

cuit.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-37

Fig.
50 - Instrument Cluster Installation — Camaro

FUEL GAUGE REPLACEMENT

1.
Remove instrument cluster assembly as previously

described.

2.
Remove cluster lamps from gauge cover plate,

ground screw and terminal nuts attaching printed

circuit to fuel gauge.

3.
Remove three screws retaining gauge assembly to

cluster housing.

4.
Carefully move printed circuit away from gauge and

remove gauge assembly from cluster housing.

5. Remove terminal nuts securing gauge to cover plate,

and detach gauge unit.

6. To install, reverse removal procedure.

TACHOMETER

NOTE:
The tachometer is a self-contained, all

transistor unit requiring very little service

other than keeping the terminal nuts clean and

tight. The unit is not serviceable and must be

replaced, if defective.

1.
Remove instrument cluster as previously described

in this section.

2.
Remove cluster lamps from rear of gauge cover and

disconnect harness wiring connections from gauge

terminals.

3.
Remove three screws retaining gauge to cluster

housing.

4.
Move printed circuit away from gauge area and re-

move gauge unit from housing.

5. Remove terminal nuts securing gauge to cover

detach unit.

6. To install, reverse removal procedure.

SEAT SEPARATOR INSTRUMENT CONSOLE

(Fig.
54)
(Fuel,
Ammeter, Temperature, Oil Pressure Gauges,

Low Fuel Warning Unit, and Clock)

1.
Disconnect battery ground cable.

2.
Remove clock shaft knob from face of cluster.

3.
Remove cover retaining screws (4) and cover from

cluster assembly.

NOTE:
Use an alien wrench to remove the two

screws located in the top of the cover below the

instrument console.

4.
Remove four screws retaining gauge mounting plate

to cluster housing.

5. Carefully disengage gauge plate from housing and

disconnect oil pipe and all electrical connections at

rear of gauges.

NOTE:
At this point, with gauge package re-

moval from housing all gauges including the low

fuel warning system may easily be serviced.

6. To install assembly, use reverse of removal

procedure.

OIL PRESSURE INDICATOR

If the light does not come on when the ignition switch

is turned on, or if the light comes on and remains on

after the engine is started, one or more of the following

conditions is indicated.

• Low oil pressure

• Defective wiring or switch

Sending Unit Replacement

1.
Disconnect wiring harness connector from sender

unit terminal (located in block above starter on L-6

engines and at left front of distributor on V-8

engines).

Fig.
51 - Speed Warning Device

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-38

Fig.
52 - Instrument Cluster Lighting

1
• Cluster Lamp

2.
* High Beam Indicator

3. Oil Pressure Indicator

4.
L.H. Directional Indicator

5. Generator indicator
6. R.H. Directional indicator

7. Temperature Indicator

8. Printed Circuit

9. Chassis Harness Connector

10,
Brake Warning Indicator

2.
Remove sender unit.

3.
Replace with new unit and check operation.

GENERATOR INDICATOR

1.
Ignition on, engine not running and indicator light off:

•Indicator bulb is burned out, replace bulb.

•Open circuit or loose connection in the indicator

light circuit.
2.
Indicator light stays on after engine is started:

•Ti indicator light does not go out at engine idle

speed, refer to Charging System Tests in Section

6Y, Engine Electrical.

TEMPERATURE (COOLING SYSTEM) INDICATOR

The temperature indicator circuit consists of two re-

motely located units, indicator lamp and sending unit.

The "indicator lamp, located in the instrument cluster

CHfVROtEr CHASM SfXVICf