head light CHEVROLET CAMARO 1967 1.G Chassis User Guide

SECTION 6M

ENGINE FUEL

CONTENTS OF THIS SECTION

Page

Carburetors 6M-1 Fuel Pumps .

Air Cleaners 6M-7 Special Tools
Page

6M-10

6M-12

CARBURETORS

INDEX

Page

General Description 6M-1

Service Procedures 6M-1

Preliminary Checks 6M-1

Idle Speed and Mixture Adjustment ........... 6M-1

Fast Idle Adjustment .................. 6M-3

Choke Adjustment 6M-3

Float Adjustment 6M-4
Page

Additional Adjustments 6M-4

Removal 6M-4

Test Before Installation 6M-5

Installation 6M-5

Fuel Filter Maintenance 6M-5

Choke Coil Replacement 6M-5

Throttle Linkage Adjustment . . 6M-6

GENERAL DESCRIPTION

Various carburetors (fig. lc) are used with Chevrolet,

Chevelle, Chevy II, Camaro and Corvette passenger

vehicles. These carburetors are designed to meet the

particular requirements of engines, transmissions and

vehicles, therefore carburetors that look alike are not

always interchangeable. (Refer to carburetor part num-

ber and/or specifications.)

Because many service procedures for the various

carburetors are similar, typical illustrations and pro-

cedures are used except where specific illustrations or
procedures are necessary to clarify the operation.

This section covers removal, installation and adjust-

ments (on engine) of carburetors. Also covered in this

section are maintenance procedures for choke coils,

throttle linkage and fuel filters. For carburetor .over-

haul procedures and additional adjustments (bench), re-

fer to Section 6M of the Overhaul Manual under the

carburetor being serviced.

Specifications for carburetors are located in the back

of this manual.

SERVICE PROCEDURES

Preliminary Checks

1.
Thoroughly warm-up engine. If the engine is cold,

allow to run for at least 15 minutes.

2.
Inspect torque of carburetor to intake manifold bolts

and intake manifold to cylinder head bolts to exclude

the possibility of air leaks.

3.
Inspect manifold heat control valve (if used) for free-

dom of action and correct spring tension.

Idle Speed and Mixture Adjustment (Except Air Injection

Reactor System)

NOTE:
This adjustment should be performed

with engine at operating temperature and park-

ing brake applied.

1.
Remove Air Cleaner.

2.
Connect tachometer and vacuum gauge to engine, then

set hand brake and shift transmission into neutral.

3.
As a preliminary adjustment, turn idle mixture

screws lightly to seat and back out 1-1/2 turns.

CAUTION: Do not turn idle mixture screw

tightly against seat or damage may result.

4.
With engine running (choke wide open) adjust idle
speed screw to specified idle speed, (automatic

transmission in drive, synchronized transmission in

neutral).

5. Adjust idle mixture screw to obtain highest steady

vacuum at specified idle speed.

NOTE:
On air conditioned vehicles, turn air

conditioning to the "on" position and hold the

hot idle compensator valve closed while adjust-

ing idle speed and idle mixture screws.

NOTE:
On Rochester BV carburetors the idle

mixture screw should be turned out 1/4 turn

from the "lean roll" position. The definition

of "lean roll" point is a 20 to 30 rpm drop

in engine speed obtained by leaning the idle

mixture.

6. Repeat Steps 4 and5 as needed for final adjustment.

NOTE:
If necessary, final adjustment of the \

carburetor may be made with the air cleaner

installed.

7. Turn engine off, remove gauges and install air

clearer.

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE-ELECTRICAL 6Y-10

circuit. Make absolutely certain all connections in

the circuit are secure.

5.
Do not short across or ground any of the terminals

on the generator or regulator.

6. Do not attempt to polarize the generator.

7.
Do not disconnect lead at generator without first dis-

connecting battery ground cable.

Trouble in the A.C. charging system will usually be

indicated by one or more of the following conditions:

1.
Faulty indicator lamp or ammeter operation.

2.
An undercharged battery (usually evidenced by slow

cranking speeds).

3.
An overcharged battery (usually evidenced by exces-

sive battery water usage).

4.
Excessive generator noise or vibration.

Described below are a series of on-the-vehicle quick

checks which are designed to assist the service tech-

nician in locating troubles within the various components

of the engine electrical system. Additional checks, ad-

justments and overhaul procedures of these components

are also described in the "Charging Systems—Service

Operations Section" and should be referred to as

necessary.

STATIC CHECKS

Before making any electrical checks, perform the fol-

lowing static checks:

1.
Check for loose fan belt.

2.
Check for defective battery. (Refer to Battery).

3.
Inspect all connections, including the slip-on con-

nectors at the regulator and Delcotron.

NOTE: Do not short field to ground to check if

generator is charging since this will seriously

damage the charging system.

SYSTEM CONDITION TEST

This test is used .to indicate the overall condition of the

charging system (both good and defective) and to isolate

the malfunctioning unit if the system is defective.

NOTE: On Corvette models difficulty may be

encountered -when attempting to make the re-
quired test connections at the voltage regulator.

It is advisable to remove the regulator from its

mounting location to perform the necessary con-

nections at the regulator for the following tests

but make sure unit is grounded.

1.
With ignition off, perform the prescribed Static

Checks outlined in this section. Then set hand brake

and shift transmission
into
neutral.

2.
Connect a voltmeter from junction block relay to

ground at regulator base.

CAUTION: Be sure meter clip does not touch a

resistor or terminal extension under regulator,

3.
Connect a tachometer on engine.

4.
Models equipped with Indicator Lamp: Turn ignition

switch on "ON" position and check indicator lamp.

If lamp fails to glow, perform appropriate tests and

corrections (Indicator Lamp Circuit Tests) before

continuing.

Models equipped with Ammeter: Turn ignition

switch to "ACC" with an accessory on and check

ammeter. If ammeter fails to read discharge, check

ammeter circuit before continuing.

5.
Models equipped with Indicator Lamp: If lamp glows,

start the engine and run' it at 1500 rpm or above.

Check indicator lamp. If lamp fails to go out, per-

form appropriate test and corrections (Indicator

Lamp Circuit Test) before continuing.

Models equipped with Ammeter: If ammeter reads

discharge, start the engine and observe ammeter. If

meter fails to move toward charge (from original

position), perform appropriate test and corrections

(Field Circuit Tests) before continuing.

NOTE: At this point a field circuit has been

established and any other problem will lie in

generator or regulator.

6. Turn on high-beam headlights and heater blower

motor to high speed, run engine at or above 1500

rpm (for a few minutes, if necessary) and read the

voltage on meter.

AIR GAP

ADJUSTING NUT

ONLY

ADJUSTING SCREW

(Turn To Adjust

Voltage Setting)

Fig.
6c—Adjusting Voltage Setting

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE-ELECTRICAL 6Y-15

L
RELAY

TERMINAL "F" TERMINAL

"BAT" \ ' /

TERMINAL
/ / /
GRD7
TERMINAL

5.5" SERIES ID DELCOTRON
"BAH"

TERMINAL

^Vs^^^^lijBii^^8C^3^SH|j^^^^^^sH^^Bf- y/

RELAY ^^^"^^^jWwIi^^^^ RELAY

6.2" SERIES 2D, TYPE 150 DELCOTRON

Fig.
14c—Delcotrons - Full View

end or use Adapter J-21501 and a box wrench) on re-

taining nut, insert a 5/16" alien wrench through

socket and adapter into hex on shaft to hold the shaft

while removing the nut.

2.
Remove washer and slide pulley from shaft.

3.
To install, slide pulley and washer on shaft and start

the nut.

4.
Use the socket and adapter with a torque wrench and

tighten-nut to 50 ft. lbs. torque.

BRUSH
REPLACEMENT

6.2"
Delcotron

1.
Remove two nuts retaining the blade connectors and
remove the connectors (fig. 17c). Slide the indicator

light relay wire from the terminal post.

2.
Remove two screws retaining the capacitor and brush

holder to rear end frame, Remove brush holder.

3.
To install brushes, push brushes into holder and

install pin to keep the brushes in holder.

4.
Attach brush assembly and condenser to the end

frame with hex-head stud on the .left side only.

Fig.
15c—Pulley Removal

Fig.
16c—Torqulng Pulley Nut

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE-ELECTRICAL 6Y-22

ADJUST DWELL

ANGLE SETTING OR

POINT OPENING

Fig.
lOi—Settihg Point Opening

To adjust the contact point opening:

1.
If necessary, align points (fig. 9i) by bending the

fixed contact support. Do not bend the breaker lever.

Do not attempt to align used points; replace them

where serious misalignment is observed. Use an

aligning tool if available.

2.
Turn or crank the distributor shaft until the breaker

arm rubbing block is on the high point of the cam

lobe.
This will provide maximum point opening.

3.
Loosen the contact support lock screw.

4.
Use a screw driver (fig. lOi) to move the point sup-

port to obtain a .019" opening for new points and a

.016"
opening for used points.

5.
Tighten the contact support lock screw and recheck

the point opening.

6. After checking and adjusting the contact point open-

ing to specifications, the cam angle or dwell should

be checked with a dwell angle meter if such equip-

ment is available (see Specifications for proper dwell

angle).
If the cam angle is less than the specified

minimum, check for defective or misaligned contact

points or worn distributor cam lobes. The variation

in cam angle readings between idle speed and 1750

engine rpm should not exceed 3°. Excessive varia-

tion in this speed range indicates wear- in the

distributor.

NOTE:
Cam angle readings taken at speeds

above 1750 engine rpm may prove unreliable

on some cam angle meters.

Eight Cylinder Engine Distributor

On the Vehicle

With the engine running at idle and operating tempera-

tures normalized, the dwell is adjusted by first raising

the window provided in the cap and inserting a "Hex"

type wrench into the adjusting screw head (fig. Hi).
WINDOW

r- "HEX" TYPE

WRENCH

ADJUSTING

SCREW

Fig.
-lli—Adjusting Dwell Angle

1.

Preferred Method - Turn the adjusting screw until

the specified dwell angle is obtained as measured in

degrees (28° to 32°, 30° preferred) by a dwell angle

meter.

2.
Alternate Method - Turn adjusting screw in (clock-

wise) until the engine begins to misfire, then turn

screw 1/2 turn in the opposite direction (counter-

clockwise). This will give the approximate dwell

angle required. (Use only when meter is not

available.)

Off the Vehicle

1.
Distributor Test Method:

a. With the distributor mounted on a distributor

testing machine, connect the dwell meter to the

distributor primary lead.

b.
Turn the adjusting screw (fig. lli) to set the dwell

angle to 30 degrees.

2.
Test Light Method:

a. With the distributor mounted in a vise, connect a

testing lamp to the primary lead.

b.
Rotate the shaft until one of the circuit breaker

cam lobes is under the center of the rubbing block

of the breaker lever.

c. Turn the adjusting screw clockwise (fig. lli) until

the lamp lights, then give the wrench 1/2 turn in

the opposite direction (counter-clockwise) to ob-

tain the proper dwell angle.

DISTRIBUTOR CONDENSER

PERFORMANCE DIAGNOSIS

The following four factors affect condenser perform-

ance,
and each factor must be considered in making any

condenser test.

1.
Breakdown - A failure of the insulating material. A

direct short between the metallic elements of the

condenser. This prevents any' condenser action.

2.
Low Insulating Resistance (Leakage) - Low insula-

tion resistance prevents the condenser from holding

a charge. All condensers are subject to leakage

which, up to a certain limit, is not objectionable.

3.
High Series Resistance - Excessive resistance in

the condenser circuit due to broken strands in the

CHEVROLET CHASSIS SERVICE MANUAL

CHASSIS SHEET METAL 11-13

HOOD ADJUSTMENT

The alignment of the hood in relation
to*
other sheet

metal parts is controlled by the position of the hood

hinges and the height of the two bumpers, located one at

each end of the radiator support. The adjustments at

the hood latch must be made after the hinges and bumpers

are positioned to yield the dimensions shown in Figure

17.
Latch adjustments are made so that effort required

to open and close the hood is reasonable, and hood align-

ment obtained by hinge and bumper adjustment is main-

tained when the hood is closed. Note that the hood latch

is not designed or intended to correct basic hood align-

ment faults.

To align the hood and lock, proceed as follows:

HOOD HINGE (Fig. 18)

1.
Note that the mounting holes in the body-mounted

end of the hinge are slotted to provide up and down

movement of the hood assembly while the hood

mounted end is slotted to provide fore and aft move-

ment.

2.
Scribe a mark around the entire hinge plate which

will be involved in the adjustment.

3.
Loosen the appropriate screws and shift the position

of the hood on the hinge plate the approximate amount

to correct misalignment, using the scribed marks to

check amount of movement. Check condition of ad-

justment by tightening cap screws and closing hood.

Fig.
18 - Hood Hinge - Chevy II
Fig.
19 - Hood Lock, Catch and Support - Chevy II

HOOD BUMPERS

Hood bumpers must be adjusted until hood and fender

line up as shown in Figure 17.

HOOD CATCH AND LOCK (Fig. 19)

Hood lock plate mounting holes are slotted to provide

fore and aft adjustment of the hood lock bolt. The hood

lock bolt itself is adjustable for up and down positioning

of the lock bolt head so that its proper engagement in the

latch assembly may be provided for. The distance that

the lock bolt protrudes out of the lock plate should be

adjusted so that the hood bumpers are slightly com-

pressed by the fully latched hood and so that the effort

required to release the hood catch is reasonable.

FENDER ADJUSTMENT (Figs. 17 and 20)

DO NOT CHANGE SKIRT ASSEMBLY-TO-DASH SHIM-

MING IN AN EFFORT TO ADJUST THE DOOR-TO-

FENDER GAP OR ANY OTHER SHEET METAL AP-

PEARANCE ITEM.

The front fenders are shimmed independently of the

skirt assemblies, unlike conventional- vehicles on which

almost the entire front end sheet metal assembly is

shimmed and adjusted as a unit.

Figure 20 shows the locations of front fender shims.

1.
The rocker panel extension location allows adjust-

ment to make fender outer surface flush with door

outer surface.

2.
The upper or plenum chamber location provides a

means of adjusting fender upper surface so that it

is flush with the upper surface of the cowl.

3.
The locations atop the skirt assembly are shimmed

to close the gap created between the fender mounting

flange and skirt assembly when the plenum chamber

CHEVROLET CHASSIS SWVICE MANUAL

CHASSIS SHEET METAL 11-20

GENERAL DESCRIPTION

The Camaro sheet metal components are much the

same as other Chevrolet passenger models as shown in

Figure 32. The front end design is such that servicing

of the fenders and skirts is most efficiently performed
by removing the fender and skirt as an assembly. Refer

to Section 14 for bumper service procedures, Section 13

for radiator and grille, and Section 1A for air condition-

ing components.

MAINTENANCE AND ADJUSTMENTS

HOOD ADJUSTMENT

The Camaro hood is adjusted in the conventional man-

ner, by adjustment of the hood bumpers and hinges. The

two hood bumpers are located on each side at the top of

the radiator support. Do not attempt hood latch adjust-

ments until the hinges and bumpers are correctly ad-

justed. Latch adjustments are made so that effort re-

quired to open and close the hood is reasonable, and

hood alignment obtained by hinge and bumper adjust-

ment is maintained when the hood is closed. Note that

the hood latch is not designed to correct basic hood mis-

alignment.

HOOD HINGE (Fig. 33)

NOTE: The body mounted portion of the hood

hinges are slotted to provide up and down move-

ment. The hood mounted end is slotted to pro-

vide forward and rearward movement.

1.
Scribe a. line around the entire. hinge plate to be

repositioned.

2.
Loosen the appropriate screws and shift the position

of the hood into correct alignment using the scribe

marks to check amount of movement. Check align-

ment by tightening screws and closing the hood.

HOOD BUMPERS

Adjust hood bumpers so that hood top surface is flush

with fender and header panel top surfaces. See Figure

34 for correct sheet metal adjustment dimensions.

HOOD CATCH AND LOCK (Fig. 35)

Adjust hood lock bolt so that top surface of hood is

flush with top surface'of header panel. The distance that

the lock bolt protrudes out of the lock plate should be

adjusted so that the hood bumpers are slightly com-

pressed by the fully latched hood, and effort required

to release the hood catch is reasonable. Close the hood

and insure catch engages securely.

FENDERS

Fenders are adjustable with shims at the cowl and

rocker panel. To add or remove shims, loosen bolts
Fig. 33 - Hood Hinge - Camaro

at shim locations (fig. 36) and carefully apply force with

pry bar to provide clearance for shim removal or in-

stallation.

SHEET METAL

For proper operation of doors and hood, and for pre-

sentable appearance, adjust front sheet metal to the di-

mensions shown in Figure 34.

COMPONENT PART REPLACEMENT

NOTE: When replacing sheet metal compo-

nents on Camaro, note position and attachment

of all seals and dust shielding and replace if

necessary.

BATTERY TRAY

Removal

1.
Disconnect battery cables and remove battery from

vehicle.

2.
Remove screws securing battery tray to fender skirt

and radiator support.

3.
Remove battery tray from vehicle.
Installation

Install battery tray following removal procedure in

reverse order.

RADIATOR SUPPORT

Removal

1.
Raise hood, disconnect battery cables, and remove

battery.

2.
Remove front bumper (Section 14).

3.
Remove grille and related components (Section 13).

4.
Disconnect horns, horn relay, voltage regulator,

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 12-2

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 12-3

Fig.
2 - T-3 Safety Aimer

wearing away the insulation due to vibration.

By referring to the wiring diagrams, circuits may be

tested for continuous circuit or shorts with a conventional

test lamp or low reading volt meter.

HEADLAMP ADJUSTMENT-

T-3 HEADLAMPS

CAUTION: Check and tighten radiator support

grille retaining bolts prior to attempting head-

lamp aiming. Distorted grille or supports in

this area will hinder proper aiming of head-

lamps. On Corvette models make sure head-

lamp panel is adjusted properly - refer to

"Headlamp Panel Travel Adjustment".

When aiming headlamps, vehicle should be filled to ca-

pacity with gas, oil, and water but no load. Tires should

be uniformly inflated to recommended pressure.

the T-3 Safety Aimer-Type B (fig. 2), is used for the

headlamp aiming description that follows. An adapter is

required with the Type B T-3 Aimer when adjusting the 7

inch headlamp used on the Chevy n vehicle.

1.
Drive vehicle onto selected aiming area. Bounce

vehicle several times and allow to settle.

2.
Remove headlamp bezels.

3.
Mount the T-3 Aimers on either the No. 1 or No. 2

pair of headlamps so that "the points of the headlamps

engage the smooth inner ring of the aimers.
HORIZONTAL

AIMING

SCREW

STRING OVER

"2R" ON AIMER ARM

Fig.
4—-Headlamp Horizontal Adjustment

NOTE:
In the dual headlamp installation, the

inboard unit is designated No. 1 and the outboard

unit is designated No. 2.

4.
Secure the aimers to the headlamp units by firmly

pressing knob at center of each aimer (fig. 3). Ro-

tate crossarms inboard to approximate horizontal

position.

NOTE:
Moisten suction cups slightly to obtain

maximum holding force.

5. With both aimers in place, knot both ends of elastic

string and, using slots provided, fasten string across

horizontal crossarms of each aimer.

6. Rotate both aimers so that the string just clears the

points on the crossarms.

HORIZONTAL ADJUSTMENT

7. a. Turn horizontal aiming screw, Figure 4, on left-

VERTICAL ADJUSTMENT SCREW

Fig.
3 - Installing Aimer on Headlamp Unit
Fig.
5 - Headlamp Vertical Adjustment

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-5

Fig.
8—Turning Level Adjusting Screw to Calibrate Aimer

HEADLAMP PANEL TRAVEL ADJUSTMENT

Corvette (Fig. 9)

The headlamp panel travel is limited by two adjusting

screws which are located on the arms of the shaft

mounted stop.
Fig.
9—Headlamp Panel Travel Adjusting Screw

1.
Raise hood and as a safety precaution install a bolt

through the hole in the hood support - secure bolt

with a nut.

2.
Adjusting screw (A) limits headlamp panel travel in

open position - adjust this screw so that mounting

face of panel is within 2 degrees of vertical in the

fully open position.

NOTE: Each headlamp operates independently

of the other, therefore individual adjustment is

required for each panel.

3.
Adjusting screw (B) limits headlamp panel travel in

closed position - adjust this screw so that panel is

flush to upper body panel in the fully closed position.

4.
Lock both screws by tightening lock nut against stop.

5.
Remove safety bolt as installed in Step 1 and close

the hood.

SERVICE OPERATIONS

FRONT LIGHTING

HEADLAMP REPLACEMENT (Figs. 10 and 13)

1.
On Corvette and Camaro Rally Sport models, rotate

the headlamp panel to the open position.

2.
Remove headlamp bezel retaining screws and remove

bezel. On Chevrolet, Chevelle and Camaro models

lift bezel to disengage retaining tabs from slots in

filler panel.

3.
On Chevy n models remove three retaining ring at-

taching screws. On other models disengage spring

from the retaining ring and remove two attaching

screws.

4.
Remove retaining ring, disconnect sealed beam unit

at wiring connector and remove the unit.

5.
Attach connector to replacement unit and position

unit in place making sure the number molded into the

lens face is at the top.

NOTE: In the dual headlamp installation the

inboard unit (NO. 1) takes a double connector, the
outboard unit (No. 2) takes a triple connector

plug.

6. Position retaining ring into place and install the re-

taining ring attaching screws and spring (as

applicable).

7.
Check operation of unit and install the headlamp

bezel.

PARKING LAMP REPLACEMENT

Bulb

1.
Remove two lens retaining screws and disengage lens

from housing.

2.
Replace bulb, check operation of lamp, reinstall lens

and retaining screws.

Lamp Housing

Chevrolet, Chevelle and Chevy II (Figs. 10 and 11)

1.
Disconnect lamp wire assembly in-line connector

from wiring harness.

CHEVROLET CHASSIS SERVICE MANUAL