electrical CHEVROLET CAMARO 1967 1.G Chassis Repair Manual

CLUTCH AND TRANSMISSIONS 7-36

TURBO HYDRA-MATIC TRANSMISSION

INDEX

Page

General Description . . , . 7-36

Maintenance and Adjustments . 7-37

Transmission Fluid 7-37

Fluid Level Indicator 7-37

Shift Control Linkage Adjustment ........... 7-37

Neutral Safety Switch Adjustment 7-37

Draining and Refilling Transmission . . . 7-37

Pressure Regulator Valve 7-38

Control Valve Body . 7-39

Governor ..'.... 7-40

Modulator and Modulator Valve 7-40

Parking Linkage . . 7-40
Page

Rear Seal -. 7-40

Other Service Operations . . 7-40

Transmission Replacement 7-40

Turbo Hydra-Matic Diagnosis Procedure. ......... 7-41

Sequence . ; ; 7-41

Oil Level and Condition Check 7-41

Manual Linkage 7-41

Oil Leaks .' 7-41

Case Porosity - Repair ................ 7-42

Oil Pressure Check 7-42

Transmission Shift Points 7-42

Special Tools 7-43

GENERAL DESCRIPTION

The Turbo Hydra-Matic transmission is a fully auto-

matic unit consisting primarily of a 3-element hydraulic

torque converter and a compound planetary gear set.

Three multiple-disc clutches, one sprag unit, one roller

clutch and two bands provide the friction elements re-

quired to obtain the desired function of the compound

planetary gear set.

The torque converter couples the engine to the plane-

tary gears through oil and provides hydraulic torque

multiplication when required. The compound planetary

gear set produces three forward speeds and reverse.

The
3-
element torque converter consists of a pump or

driving member, a turbine or driven member, and a

stator assembly. The stator is mounted on a one-way

roller clutch which will allow the stator to turn clock-

wise but not counter-clockwise.

The torque converter housing is filled with oil and

is attached to the engine crankshaft by a flex plate and

always rotates at engine speed. The converter pump is

an integral part of the converter housing, therefore the

pump blades, rotating at engine speed, set the oil within

the converter into motion and direct it to the turbine,

causing the turbine to rotate.

As the oil passes through the turbine it is traveling in

such a direction that if it were not re-directed by the

stator it would hit the rear of the converter pump blades

and impede its pumping action. So at low turbine speeds,

the oil is re-directed by the stator to the converter pump

in such a manner that it actually assists the converter

pump to deliver power or multiply engine torque.

As turbine speed increases, the direction of the oil

leaving the turbine changes and flows against the rear

side of the stator vanes in a clockwise direction. Since

the stator is now impeding the smooth flow of oil, its

roller clutch releases and it revolves freely on its shaft.

Once the stator becomes inactive, there is no further

multiplication of engine torque within the converter. At

this point, the converter is merely acting as a fluid

coupling as both the converter pump and turbine are

being driven at approximately the same speed - or at a

one-to-one ratio.

A hydraulic system pressurized by a gear type pump

provides the working pressure required to operate the

friction elements and automatic controls.

External control connections to transmission are:
Manual Linkage

Engine Vacuum

12 Volt Electrical

Signal
To select the desired op-

erating range.

To operate a vacuum mod-

ulator unit.

To operate an electrical

detent solenoid.

A vacuum modulator is used to automatically sense

any change in the torque input to the transmission. The

vacuum, modulator transmits this signal to the pressure

regulator for line pressure control, to the 1-2 accumula-

tor valve, and to the shift valves so that all torque re-

quirements of the transmission are met and smooth

shifts are obtained at all throttle openings.

The detent solenoid is activated by an alectric switch

on the carburetor. When the throttle is fully opened, the

switch on the carburetor is closed, activating the detent

solenoid and. causing the transmission to downshift at

speeds below approximately 70 MPH.

The selector quadrant has six selector positions: P,R,

N,D,
L2,L1.

P.
*
- Park position positively locks the output shaft to

the transmission case by means of a locking pawl

to prevent the vehicle from rolling in either di-

rection. The engine may be started in Park

position.

R. - Reverse enables the vehicle to be operated in a

reverse direction.

N.
- Neutral position enables the engine to be started

and run without driving the vehicle.

D,
- Drive Range is used for all normal driving condi-

tions and maximum economy. Drive Range has

three gear ratios, from the starting ratio to

direct drive. Detent downshifts are available by

depressing the accelerator to the floor.

L2.
- L2 Range has the same starting ratio as Drive

Range, but prevents the transmission from shift-

ing above second speed to retain second speed

acceleration when extra performance is desired.

L2 Range can also be used for engine braking.

L2 Range can be selected at any vehicle speed,

and the transmission will shift to second gear and

remain in second until the vehicle speed or the

throttle are changed to obtain first gear operation

in the same manner as in D Range.

CHIVROLET CHASSIS SERVICE MANUAL

CLUTCH AND TRANSMISSIONS 7-40

pipes.
If
care
is
taken
in
removing control valve

body
the six (6)
check balls will stay
in
place above

the spacer plate.

CAUTION:
Do not
drop manual valve.

5. Remove
the
governor pipes
and
manual valve from

control valve body.

Installation

Installation
of the
control valve body
is the
reverse
of

the removal.

GOVERNOR

Removal
.

1.
Remove governor cover attaching screws, cover,
and

gasket.

2.
Discard gasket.

3.
Withdraw governor assembly from case.

Installation

Installation
of the
governor assembly
is the
reverse
of

the removal.
Use a new
gasket under
the
governor

cover.

MODULATOR AND MODULATOR VALVE

Removal

1.
Remove modulator assembly attaching screw
and

retainer.

2.
Remove modulator assembly from case. Discard

"O"
ring seal.

3.
Remove modulator valve from case.

Installation

Installation
of the
modulator assembly
and
modulator

valve
is the
reverse
of the
removal.
Use a new
"O" ring

seal
on the
modulator assembly.
PARKING LINKAGE

Removal

1.
Remove bottom
pan and oil
strainer.

2.
Unthread
jam nut
holding detent lever
to
manual

shaft.

3.
Remove manual shaft retaining
pin
from case.

4.
Remove manual shaft
and jam nut
from case.

NOTE:
DO NOT
remove manual shaft seal
un-

less replacement
is
required.

5. Remove parking actuator
rod and
detent lever
as-

sembly.

6. Remove parking pawl bracket attaching screws
and

bracket.

7. Remove parking pawl return spring.

NOTE:
The
following steps should
not be com-

pleted unless part replacement
is
required.

8. Remove parking pawl shaft retainer.

9.
Remove parking pawl shaft,
cup
plug, parking pawl

shaft, and parking pawl.

Installation

Installation
of the
parking linkage
is the
reverse
of the

removal.
Use new
seal
and cup
plug,
if
removed,
and

new bottom
pan
gasket.

REAR SEAL

Removal

1.
Remove propeller shaft.

2.
Pry
seal
out
with screw driver.

Installation

1.
Using Tool J-5154
or
J-21359 install
new
seal.

2.
Re-install propeller shaft.

OTHER SERVICE WITH TRANSMISSION IN VEHICLE

The following operations when done
as
single opera-

tions
and not as
part
of a
general overhaul should,
as a

practical matter,
be
performed with
the
transmission
in

the.
vehicle. Refer
to the
"Transmission Disassembly

and Reassembly" section
of the
Overhaul Manual
for

service procedures.

a. Oil
filler pipe
and
"O"
ring seal.

b.
Oil pan
and
gasket.

c. Down shift solenoid
or
connector.
d. Valve body spacer plate, gasket
and
check balls.

e. Front accumulator piston.

f.
Rear servo
and
rear accumulator assembly.

g.
Rear band apply checking with Tool J-21370.

Ji.
Front servo assembly.

i. Speedo driven gear.

j.
Case extension
or
gasket.

k.
Strainer
and
"O"
ring.

TRANSMISSION REPLACEMENT

Before raising
the car,
disconnect
the
battery
and re-

lease
the
parking brake.

1.
Remove propeller shaft.
8.

2.
Disconnect speedometer cable, electrical lead to case
9.

connector, vacuum line
at
modulator,
and oil
cooler
10.

pipes.

3.
Disconnect shift control linkage.

4.
Support transmission with suitable transmission jack.
11.

5. Disconnect rear mount from frame crossmember.

6. Remove
two
bolts
at
each
end of
frame crossmember
12.

and remove crossmember.

7. Remove
oil
cooler lines, vacuum modulator line,
speedo cable,
and
detent solenoid connector wire
at

transmission.

Remove converter under
pan.

Remove converter
to
flywheel bolts.

Loosen exhaust pipe
to
manifold bolts approximately

1/4
inch,
and
lower transmission until jack
is
barely

supporting
it.

Remove transmission
to
engine mounting bolts
and

remove
oil
filler tube
at
transmission.

Raise transmission
to its
normal position, support

engine with jack
and
slide transmission rearward

from engine
and
lower
it
away from vehicle.

CHEVROLET CHASSIS SERVICE MANUAL

CHASSIS SHEET METAL 11-4

FENDERS

Fenders are adjustable with shims at the cowl and

rocker panel. To add or remove shims, loosen bolts at

shim locations (fig. 7) and carefully apply force with pry

bar to provide clearance for shim removal or installa-

tion.
SHEET METAL ADJUSTMENTS

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

sentable appearance, adjust front sheet metal to the tol-

erances shown in Figures
4-
and 5.

COMPONENT PART REPLACEMENT

NOTE: When replacing sheet metal compo-

nents on Chevrolet or Chevelle, note position and

attachment of all seals and dust shielding and

replace as necessary.

BATTERY TRAY

Removal

1.
Disconnect battery cables.

2.
Remove screw retaining battery hold down clamp and

remove battery from vehicle.

3.
Remove screws retaining battery tray to fender skirt

and radiator support.

4.
On Chevrolet, remove headlamp bezel and remove

screw retaining tray to radiator support.

5.
Remove battery tray from vehicle.

Installation

Reverse removal procedure.

RADIATOR SUPPORT

Removal

1.
Remove front bumper (Section 14).

Fig.
3 - Hood Hinge - Chevrolet
2.
Remove grille and related components (Section 13).

3.
Remove battery tray as outlined above.

4.
Remove all electrical connections from radiator

support.

5.
Remove windshield washer bottle from bracket on

radiator support.

6. Remove shroud and radiator (Section 13).

7.
Remove screws and bolts securing support to skirts,

fenders, and frame horns (figs. 8 and 9).

8.. Spread fenders apart enough to allow support move-

ment and remove support from front of vehicle.

Installation

1.
Position the radiator support in vehicle", aligning

mounting screw and bolt holes with drift punch.

2.
install screws and bolts loosely until all are started.

3.
Replace all parts removed following removal proce-

dure in reverse order.

4.
Refer to torque specifications in rear of manual for

correct torque values.
•

5.
Aim headlamps as outlined in Section 12.

FENDER ASSEMBLY

Removal

1.
Remove hood with hinges from vehicle as outlined in

this section.

2.
On Chevrolet models, remove headlamp bezels and

headlamps; on Chevelle models, remove grille ex-

tension panels (fig. 1 or 2 as applicable).

3.
Disconnect wiring harness clips from fender to be

removed.

4.
If applicable, remove horn assembly from fender.

5.
If applicable, remove radio antenna.

6. Remove fender brace (fig. 1 or 2 as applicable).

7.
Remove screws retaining fender to radiator support,

skirt, cowl, filler panel, tie bar, and rocker panel.

Note number and location of shims removed from

locations shown in Figure 7.

8. Remove fender from vehicle.

Installation

Refer to disassembly procedure for location of screws

and install screws loosely. Install the shimmed screws

at rocker panel and cowl and adjust fender (figs. 4 and 5)

before tightening other screws. Always start adjustment

with original amount of shims, then add or remove shims

as required.

FENDER SKIRT

Removal

CAUTION: Chevelle air conditioned models

have condenser hoses routed through the right

front fender skirt. Cut skirt and bend as neces-

sary to move hoses clear of skirt. If necessary,

refer to Section 1A for air conditioning compo-

nents and procedures.

CHEVROLET CHASSIS SERVICE MANUAL

CHASSIS SHEET METAL 11-22

wiring harness, and washer bottle from radiator

support.

5.
Remove screw connecting battery tray to radiator

support.

6. Remove shroud from vehicle if so equipped.

7.
Remove shroud and radiator (Section 13).

8. Remove screws securing support to frame, skirts,

and fenders.

9. Remove radiator support from vehicle.

Installation

Install radiator support following the removal pro-

cedure in reverse order. Refer to torque specifications

in rear of manual for correct torque values for radiator

supportj grille, and bumper.

FENDER AND SKIRT ASSEMBLY

Removal

1.
Remove front bumper (Section 14).

2.
Remove hood and hood.hinges (two men).

3.
Remove bolts securing brace to skirt and dash panel

and remove brace (fig. 32).

4.
Disconnect any components attached to fender and

skirt such as cruise control, hoses, electrical har-

ness etc.

5.
Remove screws securing radiator support to fender

and skirt.

6. Remove headlamp bezel and headlamp.

7.
Remove screws securing fender and skirt assembly

to header panel, headlamp housing and valance panel.

Remove screw securing fender extension to valance

panel.

8. Remove screws securing fender and skirt assembly

to vehicle and remove fender and skirt assembly.

9. If necessary, remove screws attaching fender ex-

tension and bumper bracket to fender and remove

extension and bracket. Replace fender trim if nec-

essary.

Installation

Install fender anci skirt assembly following the removal

procedure in reverse order. Refer to torque specifi-

cations in rear of manual for correct torque values.

HOOD ASSEMBLY

Procedures for hood removal and installation for

Camaro are the same as for Chevrolet and Chevelle.

Refer to Chevrolet and Chevelle hood removal and in-

stallation procedures, Figure 35 for Camaro hood catch,

support, and lock plate, and Figure 37 for Camaro hood

and insulator.

HOOD CATCH AND LOCK (Fig. 35)

Removal

1.
Remove catch plate assembly by removing screws

retaining catch to header panel, center support, and

radiator support.

NOTE: Before removing hood lock plate from

hood, locate position on hood by scribing around

base of lock plate.

2.
Remove lock plate by removing screws retaining lock

plate to hood and remove lock plate.
Fig.
35 - Hood Catch, Support, and Lock Plate - Camaro

Installation

Install lock and catch plate following the removal pro-

cedure in reverse order. Refer to torque specifications

in rear of manual for correct torque values. Adjust lock

and catch plate as outlined under adjustment procedure

in this section.

HOOD TRIM AND INSULATION (Fig. 37}

. Figure 37 shows the installation details of the Camaro

hood ornament and insulation pad. The insulation and

ornament retainers and nuts are accessible from under

the raised hood.

COWL VENT GRILLE

.Procedures'for Camaro cowl vent grille replacement

are the same as for Chevrolet and Chevelle. Refer to

Chevrolet and Chevelle cowl vent grille replacement.

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 12-4

b.
hand lamp until the string is positioned over the

crossarm centerline. Turn the screw clockwise

in making the final adjustment to take up play in

the headlamp mechanism.

Repeat the above procedure on the right-hand

lamp to complete the horizontal adjustment of the

headlamps.

VERTICAL ADJUSTMENT

8. a. Numeral "2" (fig. 5) should appear in the "down"

window of each aimer. If not, loosen knob at

underside of aimer arm and slide back and forth

until the numeral does appear.

NOTE:
This setting will give a 2" drop of the

headlamp high beam spot centerline on a screen

placed 25 feet forward of the vehicle. Check

state laws for proper vertical setting.

b.
Turn headlamp vertical aim screw (fig. 5) on left-

hand unit counter-clockwise until the bubble is at

the inner end of the glass tube. Then turn screw

clockwise until bubble is centered in tube.

c. Repeat this procedure on right-hand headlamp

unit to complete vertical adjustment of lamps.

9. Recheck the string at the ends of each crossarm for

correct setting and the bubble on each aimer for

centered position.

10.
Remove the aimers by pulling on the suction cup tabs

through the openings in the aimers (fig. 6).

11.
With headlamps properly aimed, replace headlamp

bezels.

HOW TO SELECT A LEVEL AIMING AREA

1.
Select area you believe to be level.

2.
Remove headlamp bezels and install Aimers on each

headlamp (fig. 3) making sure aiming lugs engage

smoooth inner ring of the Aimer.
"
To install Aimer,

press firmly on the knob extending out from the cen-

ter of the Aimer base. This forces the suction cup

into place on the Sealed Beam unit.:

3.
Loosen the slider knob beneath the aimer arm and

set the numeral "2" in the DOWN view window (fig.

7).
Back vertical lamp adjustment out on each lamp

until bubble is outside of black line of vial, then cen-

ter bubble in between black line of vial by turning

clockwise.
VERTICAL AIMING SCREW

VIEW WINDOWS

BUBBLE

Fig.
6 - Removing Aimer from Headlamp
Fog.
7- Selecting Level Aiming Area

4.
After botli bubbles are centered, turn the car around

end for end, making sure the tires are in the spots

made on the floor before the car was moved.

.5.
If the bubbles are still within the two outside black

marks on the vials, the floor is level enough to use

the Aimer as it comes from the factory.

NOTE:
A quick level check can be made by

using the T-3 Safety-Aimer as a level. Use

with a true eight to ten foot two by four as an

extension. Make sure pads on base of Aimer

are used. Place the board where you expect the

wheels to be and take readings as outlined above.

6. If either bubble moves outside the black lines of the

vial there is too much slant to the floor. Try driving

the car in at different angles onto the aiming area.

If bubbles can
not
be centered follow procedure under

"How to Compensate for Unlevel Floor."

NOTE:
When level portion of floor is obtained,

mark tire spots on floor so spots can be used

next time without calibrating Aimer.

TO COMPENSATE FOR UNLEVEL FLOORS

If your floor is not level within the limits specified, the

T-3 Aimer can be calibrated to compensate for the error

in the floor. Follow this procedure with both aimers.

1.
Drive the car onto the area for which you wish to

compensate the aimers, and install the aimers in

place on the headlamps.

2.
Loosen knob beneath the aimer arm and move the

slider until the bubble is centered.

3.
Record the numeral in the view window. (This nu-

meral is to be used only for recalibration.)

4.
Move the slider to a position halfway between this

recorded numeral and the numeral "2" in the
DOWN

window. (This numeral is used only in recalibration

and not for headlamp aiming.)

5.
Recalibrate aimers by turning screw shown in Figure

8 until the bubble is centered.

6. The T-3 Aimers are now calibrated for the selected

area. All future aiming must be done in the same

area and with the car pointed in the same direction.

Mark the tire spots on the floor so that other vehi-

cles can be located in the same position.

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

ELECTRICAL-BODY AND CHASSIS 12-6

\ \

CHEVROLET
CHEVELLE

CHEVY II
CAMARO

Fig.
10 - Headlamp Assemblies (Exc. Corvette)

1.
2.
Remove two bolts retaining housing assembly in Corvette (Fig. 12)

bumper and remove housing.

3.
Remove lens retaining screws, lens and bulb from

housing assembly and transfer to new housing unit.

4.
Connect lamp wiring assembly to harness assembly,

housing and check operation of lamp.

5. Position lamp assembly in place and.install retaining

bolts.

Camaro (Fig. 10)

1.
Raise hood.

2.
Disconnect wiring harness at rear of lamp socket.

3.
Remove attaching nut and disconnect ground wire at

sheet metal connection.

4.
Remove retaining nuts and housing from grille

opening.

5. Transfer lens and bulb to new unit.

6. To install, position lamp housing to grille opening

and install retaining nuts.

7. Connect ground wire to attaching point and install

retaining nut.

8. Connect wiring harness to lamp socket and check

operation of lamp.
Raise hood and disconnect harness connector from

lamp unit skirt-mounted
connector;
then
remove'lamp

unit connector from underside of skirt.

Working at the forward portion of the wheel well, re-

move the two lamp assembly retaining nuts and re-

move the lamp assembly and support from the

vehicle.

Route the lamp assembly lead wires through fender

cutout and position support over lead wires.

Position lamp unit studs through support and install

retaining nuts, making sure that the studs are

horizontal.

Connect harness to lamp unit skirt-mounted connec-

tor and close vehicle hood.

FENDER LAMP SERVICE (Fig. 11)

Chevrolet 16600 Models

1.
Disconnect parking lamp wiring from forward har-

ness connector.

CHEVROLET CHASSIS SERVICE MANUAL