1967 CHEVROLET CAMARO brake light

WHEELS AND TIRES 10-3

Fig.
3 - Spof Wear

to cautioning the owner of his driving habits, is to inter-

change tires regularly.

Side

This may be caused by incorrect wheel camber, under-

inflation, high cambered roads or taking corners at too

high a rate of speed.

The first two causes are the most common. Camber

wear can be readily identified because it occurs only on

one side of the treads, whereas underinflation causes

wear on both sides (fig. 2).

There is, of course, no correction for high cambered

roads.
Cornering wear is discussed further on.

Center

This is caused primarily by overinflation pf the tire

(fig. 2). Invisible fabric damage can also be caused by

overinflation.

Uneven

Uneven or spotty wear (fig. 3) is due to such irregu-

larities as unequal caster or camber, bent front or rear

suspension parts, out-of-balance wheels, brake drums
Fig.
4 - Cornering Wear

out-of-round, brakes out-of-adjustment, or other me-

chanical conditions. The remedy in each case consists

of locating the mechanical defect and correcting it.

Cornering

Since the introduction of independent spring front and

rear wheels, improvements in spring suspension have

enabled drivers to negotiate curves at higher rates of

speed with the same feeling of security that they had

with the older cars at lower speeds. Consequently,

curves are being taken at higher speeds with the result

that a type of tire wear called "Cornering Wear" (fig. 4),

frequently appears.

When a car makes an extremely fast turn, the weight

is shifted from a normal loading on all four wheels to an

abnormal load on the tires on the outside of the curve

and a very light load on the inside tires due to centrifugal

force. This unequal loading may have two unfavorable

results.

First, the rear tire on the inside of the curve may be

relieved of so much load that it is no longer geared to

CHEVROLET CHASSIS SERVICE MANUAL

WHEELS AND TIRES 10-5

WHEELS

The wheel and tire assembly should be removed from

vehicles equipped with disc brakes to properly perform

balancing operations. This is necessary due to drag of

the spring loaded brake shoes on the disc.

Static Balancing (W/Tire)

Static Balance (still balance) is the equal distribution

of weight of the wheel and tire assembly about the axis

of rotation so that the assembly has no tendency to rotate

by
itself.
Static unbalance causes the pounding action of

the front wheels that is called "tramp".

To correct static unbalance (front and rear): The

quickest and best methods to correct static unbalance

are through the use of wheel balancers which are com-

mercially available. Refer to the Information and in-

structions included with these balaricers.

Dynamic Balancing (W/Tire)

Dynamic Balance (running balance) requires the wheel

to be not only in static balance, but balanced and running

smoothly while turning on an axis which runs through the

centerline of the wheel and tire perpendicular to the axis

of rotation.

The quickest and best methods of testing and correcting

dynamic unbalance are by the use of dynamic wheel

balancers which are commercially available. These bal-

ancers include all necessary information on where and

how the balancing weights should be placed. The follow-

ing information, however, will help in the correction of

dynamic balance.

NOTE:
Before attempting to balance the

wheels, check to be certain that no foreign

matter has been trapped in the wheel ventila-

tion slots or in the accessory wheel discs. This

is especially important if the vehicle has been
run in soft mud and then parked in freezing

weather.

When a wheel that is statically unbalanced is dynam-

ically in balance the dynamic balance can be retained

while correcting "the static balance by installing the cor-

rective weights so that half of the weight required is

placed on the inner edge of the rim and the other half

on the outer edge of the rim.

Dynamic unbalance can be corrected without destroying

static balance by installing weights so half of weight

required for dynamic balance is placed on the rim op-

posite the heavy point, while the other half is placed 180°

away and on the opposite side of the rim.

NOTE:
Vehicles with wire wheel covers should

have the wheels balanced with the wire wheel

covers installed on the wheels.

Run Out (W/OTire)

The wheels should not run out (wobble) more than

1/16" as measured on the side of the rim at the base

of the tire. Excessive run-out is the result of a bent

wheel, an improperly mounted wheel, worn knuckle bear-

ings or steering connections. These parts should be

checked for correct adjustment, proper alignment and

wear whenever excessive run-out is encountered.

The wheels should also run concentric with the steering

knuckle spindle within 1/16 inch as measured on the tire

bead seat of the rim with the tire removed.

Wheel run-out, eccentricity and balance are closely

associated with steering and front wheel alignment.

Further information on these subjects will be found under

"Suspension".

Cleaning Aluminum Wheels

Do not use wire brush or abrasive cleaners when

cleaning wheels. Use only cleaners that will not react

with aluminum.

SERVICE OPERATIONS

TIRES

Removal

Dismounting tubeless tires presents no problems if the

correct procedures are used and the following precau-

tions observed.

1.
Remove the valve cap and valve core. Let out all the

air.

2.
Press the inner side of the tire into the rim well.

Use bead loosening tool or if regular tire irons are

used, take particular care not to injure or tear the

sealing ribs on the bead.

CAUTION: Never use tire irons with sharp

edges or corners.

3.
Using tire irons on the opposite side, remove bead,

taking small "bites" around the rim.

4.
Turn the tire over, and use two tire irons, one be-

tween the rim flange and the bead to pry the rim

upward, the other iron to pry outward between the

bead seat and the bead.
Installation

Extreme care must be exercised to prevent injury to

the sealing bead and circumferential bead when forcing

tire over rim.

1.
Apply a light film of Ruglyde or other suitable rubber

lubricant to sealing bead of tire.

NOTE:
The use of excessive lubrication may

lead to rim slippage and subsequent breaking of

air seal.

2.
Carefully mount the outer bead in usual manner by

using tire irons, taking small "bites" around rim,

being careful not to injure the tire bead.

CAUTION: DO NOT use a hammer, as damage

to the bead will result.

3.
Install the inner bead in the same manner.

NOTE:
If a seal cannot be effected in the fore-

going manner with the rush of air it can be

, accomplished by applying to the circumference

of the tire a tire mounting band or heavy sash

cord and tightening with the use of a tire iron.

On tire mounting machines, bouncing the tire

assembly is not required. The tire should be

CHEVROLET CHASSIS SERVICE MANUAL

SECTION 12

ELECTRICAL-BODY AND CHASSIS

CONTENTS
OF
THIS
SECTION

Page
Page

System 12-1

Instruments and Gauges 12-21

Directional Signal 12r40
Windshield Wipers and Washers 12-44

Wiring Diagrams 12-56

Special Tools 12-60

LIGHTING SYSTEM

INDEX

Page

General Description
!2-i

Maintenance and Adjustments
•.................. 12-2

Headlamp Adjustment......................
12-3

Headlamp Panel Travel Adjustment.
12-5

Service Operations.
. . .. 12-5

Front Lighting
12-5

Headlamp
. 12_5

Parking Lamp
12-5

Fender Lamp
. 12_^

Headlamp Panel
12-8

Headlamp Panel Motor
^2-9

Rear Lighting
l2-10

Tail, Stop and Directional Lamps
12-10
Page

Backing Lamps
12-14

License Plate Lamp
12-14

Automatic Transmission Quadrant Lamp
12-14

Seat Separator Console Lamps
. 12-15

Lighting Switch
. . 12-15

Wiper Switch.
12-15

Stoplight Switch
12-15

Dimmer Switch
12-15

Backing Lamp Switches
12-15

Neutral Safety Switches
12-17

Parking Brake Alarm Switch
................. 12-19

Instrument Panel Compartment Lamp/Switch
12-19

Cirgarette Lighter
12-19

GENERAL DESCRIPTION

.
The lighting system includes: the main lighting switch,

stop light, dimmer, and backing lamp switches, head-

lamps, parking lamps, stop, tail and directional lamps,

instrument illumination and indicator lamps, and the

necessary wiring to complete the various circuits. A

fuse panel provides convenient power take offs and fuse

clips for the appropriate circuits (fig. 1).

Chevrolet and Chevelle headlamp installation is all

new in that the headlamps are located in the radiator

support with adjusting screws and springs. Eliminating

the need for having separate headlamp housings. Chev-

rolet and Chevelle headlamp retainers and springs are

interchangeable.

Chevy n headlamp housings are new because of revised

front end styling and Corvette front end lighting is basi-

cally carryover.

Front fender lamps have been added as an option for

Chevrolet models and as standard equipment on Caprice

series.

Camaro models use single headlamps and the Rally

Sport model headlamps are covered by a retractable

section of the grille when lamps are not used. The sec-

tion of the grille covering the headlamps folds back when

lights are required; the headlamps are stationary. The

covering is retracted by a small electric motor mounted

to the headlamp housing. The headlamps are automat-

ically uncovered when the headlight switch is pulled "ON"

for illumination. If at any time the electrical circuit

becomes inoperative, the lamps can be uncovered manu-

ally. The ignition switch must be
"ON"
in order to close

the headlamp doors.

Parking lamp for Chevelle and Chevrolet models are
new due to revised front end sheet metal and bumper

styling. Parking lamps are located in the bumper on

Chevrolet, Chevelle and Chevy n models

Camaro parking lamps are located in the radiator

grille except for the Rally Sport models on which the

parking lamps are in the valance panel. For styling

reasons, the lens is white and an amber glass bulb is

used. All Camaro parking lamps require a separate

ground wire to assure a good ground contact because of

the plastic grille and painted contact surfaces.

The Chevrolet tail, stop, and directional lamps are in

one housing with a three section lens design on Impala

and Caprice sedans. The center lens for Impala series

is the back-up lamp. The center lens on the Caprice is

a tail lamp with the back-up lamps being located in the

rear bumper. Chevrolet station wagons have three indi-

vidual housings with three lenses, the center lamp being

the back-up. Biscayne and Bel-Air sedans have a single

housing and lens for tail, stop, and directional lamp with

a similarly constructed back-up lamp inboard and adja-

cent to it.

Chevelle tail, stop, and directional lamps are a single

lens design that follows through with the rear fender

styling. The back-up lamp is located in r.ear bumper.

Camaro models except Rally Sport have tail lamps

with integral back-up lamps mounted inboard of the rear

fenders between the trunk opening and bumper. The

Rally Sport model has dual tail lamps in the rear housing

and valance mounted back-up lamps.

Corvette, Chevy n, and Corvair tail and directional

signal lights are carryover. The Corvette has new back-

up lamps center mounted above the license plate opening.

CHEVROLET CHASSIS SERVICE

ELECTRICAL-BODY AND CHASSIS 12-15

Fig.
21 - Qlal Quadrant Assembly ~ Camaro

SEAT SEPARATOR CONSOLE LAMPS

COMPARTMENT LAMP REPLACEMENT (Fig.
22)

1.
Remove (pry up) switch assembly from console open-

ing in.the instrument compartment.

2.
Remove bulb from the socket.

3.
Replace bulb and install switch assembly in console

opening.

COURTESY LAMP REPLACEMENT (Fig. 22)

1.
Remove two screws and lens at rear of console.

2.
Remove bulb from retainer.

3.
Replace the bulb, position the lens and install attach-

ing screws.

QUADRANT LAMP REPLACEMENT (Fig. 22)

1.
Remove Dial Quadrant Trim plate retaining screws

and lift trim plate assembly from console opening.

2.
Disconnect lamp socket from the retainer and re-

move bulb from the socket.

3.
To install, insert bulb into the socket and snap the

socket assembly into the retainer.

Position the trim plate assembly into the console

opening and install the retaining screws.
4.

LIGHTING SWITCH REPLACEMENT (Fig. 24)

1.
Disconnect battery ground cable.

2.
Pull control knob out of headlamp ON position.

3.
Reach under instrument panel and depress the switch

shaft retainer (Fig. 25) and remove knob and shaft

assembly.

4.
Remove ferrule nut using Tool J-21932 and remove

switch assembly from instrument panel.

NOTE:
Some Chevelle models require use of

ToolJ-4880.

5. Disconnect the multi-plug connector from the lighting

switch. A screw driver may be inserted in the side
of the switch to pry the connector from the switch.

6. Connect the multi-plug connector to the replacement

switch (Fig. 23). Connect battery cable to battery

terminal and check operation of the light switch'in all

positions.

NOTE:
Ground switch- to check dome lamp

operation.

7. Position switch and bezel to panel mounting hole and

install ferrule jmt.

8. Insert switch control knob and shaft assembly into

switch until retainer engages shaft.

WIPER SWITCH REPLACEMENT (Fig. 26)

1.
Disconnect battery ground cable.

2.
Remove the connectors from the rear of the switch.

NOTE:
On Air Conditioned models it is nec-

essary to remove left A/C outlet duct for acces-

sibility to rear of switch.

3.
Loosen set screw and pull knob from switch shaft.

4.
Remove retaining nuts using special Tool J-21932

and withdraw wiper switch from behind console.

NOTE:
Some Chevelle models require special

ToolJ-4880.

5. To install, reverse removal procedure and check

operation of wipers.

STOPLIGHT SWITCH REPLACEMENT (Fig. 27)

1.
Disengage retaining fingers, disconnect wiring har-

ness connector from switch and unscrew switch from

mounting clip.

2.
Depress brake pedal and push new switch into clip

until shoulder bottoms out against clip.

3.
Check switch position for proper operation. Elec-

trical contact should be made when the brake pedal is

depressed 3/8" to 5/8" from fully released position.

DIMMER SWITCH REPLACEMENT (Fig. 28)

1.
Fold back upper left corner of front floor mat, disen-

gage connector lock fingers, and disconnect multi-

plug connector from dimmer switch.

2.
Remove two screws retaining dimmer switch to toe

pan.

3.
Connect multi-plug connector to new switch and

check operation. Install new switch to toe pan with

two screws. Replace floor mat.

BACKING LAMP SWITCH REPLACEMENT

Located on Mast Jacket (Fig. 29)

1.
Disconnect wiring connector at switch terminals.

2.
Remove switch attaching screws and switch from

mast jacket.

3.
Position new switch to mast jacket, install the re-

taining screws and connect wire connector to switch.

NOTE:
Position gear shift in neutral before

assembling switch to mast jacket.

4.
Check operation of switch.

Located on Transmission (Fig. 30)

1.
Raise and support vehicle.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-19

VIEW A
•CONTACT SUPPORT

DRIVE SLOT IN LINE

WITH HOLE IN SWITCH

PAWL
CONTACT POINT B

CONTACT SUPPORT

DRIVE SLOT IN LINE

WITH HOLE IN SWITCH

FLOOR SHIFT

(EXCEPT CAMARO)
COLUMN SH

Fig.
31 - Neutral Safety Switches

PARKING BRAKE ALARM SWITCH REPLACEMENT

Corvette (Fig. 33)

1.
Remove seat belt retainer and parking brake cover

assembly from center console.

2.
Disconnect wire from brake alarm switch.

3.
Remove retaining screw and switch from

reinforcement.

4.
Position new switch to reinforcement and install re-

taining screw.

5. Connect switch wire and check operation of switch.

6. Install cover and seat belt retainer assembly.

Chevrolet, Chevelle, Chevy II and Camaro (Fig. 34)

1.
Disconnect wiring connector at switch terminal.

2.
Remove nut and lock washer or retaining bolt and

disengage switch from brace.

3.
To install, reverse removal procedure.

INSTRUMENT PANEL COMPARTMENT

LAMP/SWITCH REPLACEMENT

1.
Disconnect battery ground cable.

2.
Reach into glove box, depress bulb in end of switch
and turn counterclockwise to remove bulb.

3..
Remove switch from socket. Carefully detach wire

and terminal from switch.

NOTE:
On some model switches, the wire and

terminal cannot be detached from the switch

making it necessary to cut and splice the switch

wire.

4.
Insert wire and terminal into new switch.

5. Push switch into place and install bulb by setting it in

place, depressing and turning it clockwise.

CIGARETTE LIGHTER REPLACEMENT

Chevrolet, Chevy II, Camaro and Corvette (Fig. 23)

1.
Disconnect battery ground cable.

2.
Disconnect wire connector at rear of lighter unit

under dash.

3.
Remove retainer from rear of housing assembly and

disengage lighter unit from panel.

4.
To install, reverse removal procedure.

Chevelle (Fig. 35)

1.
Disconnect battery ground cable.

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 12-23

IGNITION SWITCH LIGHTING

VIEW A

1.
Clock Knob Assembly

2.
Instrument Cluster Lamps

3. R.H. Directional Indicator

4.
"Gen'*
Indicator

5. Fuel Gauge
Fig.
38 - Instrument Cluster Connections

6. L.H. Directional

Indicator

7. "Hot" indicator

8. "Brake" Indicator

9. "Bright" Indicator
10.
"Oil Press" Indicator

11.
Clock Cover (jl5,0OQ)

12.
Clock Assembly (16,000)

1.3; Printed Circuit

14.
Instrument Panel Connector

3.
Remove screws retaining speedometer to the housing

and remove speedometer from rear cover.

NOTE:
Servicing of the speedometer assembly

should be performed by an authorized
AC
Speed-

ometer Service Station.

4.
To install, reverse the 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.

FUEL GAUGE REPLACEMENT

1.
Remove instrument cluster as previously described

in this section.

2.
Remove cluster lamps from gauge cover plate and

remove terminal nuts attaching circuit to gauge.

3.
Carefully move printed circuit away from gauge and

remove screws retaining gauge assembly to the

cluster housing.

4.
Remove gauge assembly from cluster housing and

remove three terminal nuts attaching gauge to the

cover plate.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-24

1.
Temperature Gauge

2.
Instrument Cluster Lamp

3.
R.H. Directional Indicator

4.
Ammeter Gauge
Fig. 39- Optional Gauge Cluster

5. Fuel Gauge

6. L.H. Directional Indicator

7. Tachometer

8. "Brake" Indicator

9. "Bright" Indicator
10.
Oil Pressure Fitting

11.
Chassis Harness Connector

12.
Clock Assembly

13.
Printed Circuit

NOTE:
Observe carefully the stack up of the

internal parts of the fuel gauge assembly.

5. To install, reverse removal procedure.

CLOCK OR TACHOMETER REPLACEMENT

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.
For clock replacement, remove clock set shaft knob

at front of console.

3.
Remove cluster lamps from cover, circuit attaching

screws, and terminal nuts at circuit to gauge attach-

ing points.

4.
Move printed circuit away from gauge and remove

screws retaining
•_
gauge or clock to the cluster

housing.
•5.
Remove unit, from housing and cover plate from

gauge unit.

6/To install, reverse removal procedure.

AMMETER TEMPERATURE AND OIL PRESSURE

GAUGES REPLACEMENT

1.
Remove instrument cluster as previously described

iii this section.

2.
Remove instrument lamps, attaching screws or nuts

and wiring connections as required.

3.
Remove gauge assembly backing plate retaining

screws and remove gauge assembly from cluster

housing.

4.
Remove terminal nuts and/or screws retaining gauge

to the backing plate and separate plate from the

gauge.
•

5. To install, reverse 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 condi-

tions is indicated:

CHEVROLET CHASSIS SERVICE MANUAL