
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

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

EL«C7RICAL-BODY AND CHASSIS 12-7
PARKING
A
LAMP*
2.
Remove two screws retaining lens housing to the
lamp assembly and remove lens unit.
3.
Replace bulb, lens or housing as required and posi-
tion assembly to fender opening. Make sure wiring
Fig.
11 - Parking and Fender Lamps (Chevrolet)
Fig.
12 - Parking Lamp Installation (Corvette)
Fig.
13 - Headlamp Panel and Motor Details (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-8
is inserted through radiator support opening.
Remove two screws retaining lamp assembly to
lower sheet metal.
Remove three screws retaining lamp assembly to
lender.
To replace lamp assembly, reverse removal proce-
dure and check operation of the unit.
is aligned with flat on pivot shaft. Install stop lock
bolt and torque bolt to 45-60 in, lbs. Make sure that
side-to-side panel alignment is not changed when in-
stalling and tightening the stop.
CAUTION: Do not exceed specified torque
when tightening stop lock bolt.
HEADLAMP PANEL REPLACEMENT-CORVETTE
Refer to Figure 13 for Panel Mounting details.
1.
Remove engine compartment hood as outlined in
Section 1.
2.
Actuate headlamp panel to the open position.
NOTE:
In the event headlamp motor is inop-
erative, manual positioning of the panel can be
accomplished by turning the knurled knob at in-
board end of motor. As an assist in manual
operation of panel, apply light hand pressure to
panel in desired direction of rotation.
3.
Remove positive lead from battery terminal.
4.
Remove headlamp bezel retaining screws and bezel.
5. Remove the sealed beam housing unit as an assem-
bly - disconnect sealed beam leads at harness con-
nector and remove connector from sealed beam
leads;
remove the housing-to-panel retaining screws
and remove housing unit and wiring from panel.
6. Remove motor from panel pivot shaft - see motor
removal procedure. Then remove the panel stop
from panel inboard pivot shaft, and disconnect switch
lead wires from panel, support-mounted motor
switch.
7. Remove the panel retaining bolt access hole plugs
from inside the panel then rotate panel as required
and remove the retaining bolts and slide supports
from ends of panel pivot shaft. Remove bearing, felt
seal, retainer and washer from inboard pivot shaft.
8. Remove panel from its location by alternately disen-
gaging pivots from their retaining slots and with-
drawing unit forward through opening in body (fig.
14).
9. Loosen alien screw in spacer and disassemble parts
from the panel outboard pivot shaft.
10.
Install washer, retainer, felt seal, bearing and
spacer, in that order, to panel outboard pivot shaft.
Do not tighten spacer on shaft at this time.
11.
Position panel in body opening and index panel pivot
shafts in retaining slots; then loosely install support
retaining bolts.
12.
Install washer, retainer, felt seal, bearing and sup-
port, in that order, to panel inboard pivot shaft, and
loosely install support retaining bolts. -
13.
Check side-to-side alignment of panel, making sure
that there is no panel-to-body contact; position
spacer snugly against bearing; then tighten spacer
seat screw to 30-50 in. lbs.
14.
Install stop on panel inboard shaft so that it rests
against bearing, being sure that index mark on stop
15.
Check and align panel to body as follows:
a. Tighten panel pivot support bolts snugly but still
allowing panel to" be moved by applying hand
pressure.
b.
Position panel to the closed position and align
with body so that all surfaces are flush.
c. With the panel in the closed position the outboard
access hole is aligned with the forward bolt head.
Tighten this bolt with the panel in the closed
position - access to bolt head can be obtained by
working through opening between the hood and
body.
d. Rotate panel to obtain access to each bolt head
and torque bolts to 100-140 in. lbs.
e. Connect switch lead wires to support-mounted
limit switch.
16.
Install seaLed beam housing unit and at the same time
position sealed beam lead wires through panel out-
board pivot shaft. Install housing unit retaining
screws and install lead wires in connector, making
sure to match colors between harness and connector.
17.
Install motor assembly - see motor replacement
procedure.
18.
Connect positive lead to battery terminal.
19.
Adjust headlamp panel as outlined under "Headlamp
Panel Travel Adjustment".
20.
Adjust headlamp aiming as outlined under "Headlamp
Adjustment".
21.
Install headlamp bezel and engine compartment
hood - refer to Section 1 for hood installation.
Fig.
14
- Headlamp Panel Removal (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-9
Fig.
15 - Headlamp Panel Actuating Motor Mounting (Corvette)'
HEADLAMP PANEL MOTOR-CORVETTE (Fig. 15)
Removal
1.
Raise hood and as a safety precaution install a bolt
through the hole in the hood support - secure bolt
with a nut.
2.
Remove positive lead from battery terminal.
3.
Disconnect motor lead wire and position it out of the
way.
4.
Turn the knurled knob at inboard end of motor until
the gear seems to turrj freely - turn the knob in one
direction until a definite drag is experienced, then
rotate knob approximately six complete turns in the
opposite direction.
NOTE:
The above step is necessary to produce
a no-load condition on the drive gear and to per-
mit separation of motor from the panel pivot
shaft.
5. Remove the retainer from groove in motor locating
stud then remove the motor-to-support retaining
screw and remove motor assembly from the vehicle.
Installation
1.
Rotate motor and headlamp panel as required to align
slot in motor with headlamp panel pivot shaft, and
install motor on shaft so that the bracket is aligned
with the locating stud.
NOTE:
It may be necessary to turn knurled
knob on end of motor to permit alignment of
motor with shaft.
Slide motor onto shaft until it seats against shaft
shoulder; then install retainer in groove on locating
stud.
Install motor-to-support retaining screw making
sure ground wire is installed between screw head and
bracket.
Connect motor lead wires, making sure that contacts
are clean and that connection is secure.
Connect positive lead battery terminal, remove bolt
from hood support, close hood and check operation of
headlamp panel.
HEADLAMP MOTOR REPLACEMENT-
CAMARO (Fig. 16)
1.
Disconnect battery ground cable and when working on
right headlamp unit, remove battery from vehicle to
gain access to housing retaining bolts.
2.
Remove bezel retaining screws and bezel.
3.
Remove headlamp cover retaining screws and cover
from door assembly.
4.
Manually open door assembly (push door toward cen-
ter of vehicle) and disconnect limit switch
connections.
5. Remove four screws retaining assembly to radiator
support (note location and number of shims, if any).
6. Rotate assembly toward center of vehicle until rear
of unit is exposed, then disconnect wiring connectors
at headlamp and motor assemblies.
7. Rotate assembly until headlamp is facing downward
and carefully remove the assembly from the vehicle
opening.
8. Remove nut attaching motor assembly to pivot arm.
9. Remove two nuts and bolts retaining motor assembly
to base plate and remove motor assembly.
CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-10
10.
To install, replace motor assembly, and reverse re-
moval procedure.
REAR LIGHTING SERVICE
TAIL, STOP AND DIRECTIONAL LAMPS
Bulb Replacement (Fig. 17)
1.
Disconnect lamp socket from rear of lamp unit and
remove bulb from socket.
NOTE:
Bulb removal on station wagon models
and Corvette requires, removal of the lens to
gain access to the bulb.
2.
Replace bulb and plug socket back into lamp housing.
Lamp Housing Replacement
Chevrolet, Chevelle Station Wagon,
Camaro and Chevy II (Fig. 17)
1.
Disconnect bulb socket from rear of lamp unit.
NOTE:
On station wagons remove lens to gain
access to lamp or screws securing lamp housing
to body.
2.
Remove nuts at rear of housing retaining lamp hous-
ing to vehicle body, remove housing from vehicle.
3.
Remove lens retaining screws or nuts, remove lens
and transfer to new housing unit.
4.
To install reverse removal procedure and check op-
eration of lamp unit.
HEADLAMP
WIRING ASSEMBLY
MOTOR
INSTALLATION
TO PARKING LAMP
TO RETR. HDLP. MOTOR
TO HEADLAMP
HEADLAMP
DOOR ASSEMBLY
Fig.
16- Headlamp Motor Installation (Comoro)
CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-14
BACKING LAMPS
lamp Housing Replacement (Fig. 19)
Bumper Installation
1.
Remove two screws retaining housing assembly in
the bumper and remove housing.
'2.
Disconnect lamp wire assembly connector from wir-
ing harness.
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
screws.
Corvette (Fig. 18)
1.
Remove license plate and bracket assembly.
2.
Remove tailpipe extensions and rear body valance
panel.
3.
Remove backing lamp attaching nuts.
4.
Disengage backing lamp assembly from body opening
and disconnect wiring harness at rear of lamp.
5. Transfer bulb, gasket and lens to replacement
housing.
6. Connect chassis wiring connector to housing and po-
sition lamp assembly to body opening.
7. Attach ground wire to housing and install retaining
nuts to housing.
8. Install body valance panel.
9. Position license plate assembly to body and install
retaining screws.
LICENSE PLATE LAMP SERVICE
Lamp Housing
1.
Remove the lamp assembly retaining screws and re-
move lamp assembly from mounting location (rear
bumper center face bar most models). On Corvette
models remove rear valance panel.
2.
Disconnect lamp wiring from chassis harness con-
nector (inside trunk on some models).
3.
Force grommet and Wiring down through body open-
ing (where applicable) and remove assembly from
vehicle.
4.
To install replacement unit, insert grommet and wir-
ing through body opening where applicable and con-
nect wiring to chassis harness.
5. Position assembly and install retaining screws. On
Corvette models make sure ground wire is properly
installed.
6. Check operation of lamp assembly.
iuib Replacement
1.
Remove lens retaining screws and lens.
NOTE:
On Camaro models loosen housing re-
taining screws.
2.
Remove and replace bulb.
3.
Position lens and install retaining screws.
AUTOMATIC TRANSMISSION
QUADRANT LAMP REPLACEMENT
Chevrolet (Fig. 20)
1.
Remove four screws retaining lower mast jacket
cover to upper cover.
2.
Remove two screws retaining upper cover to instru-
ment console.
3.
Remove two screws securing shield to upper cover
assembly.
4.
Remove and replace bulb.
5. Position shield to upper cover assembly and install
retaining screws.
6.' Position upper cover assembly to instrument console
and install retaining screws.
7. Position lower cover and install four retaining
screws.
Chevy II and Camaro (Fig. 21)
1.
Remove two screws attaching retainer and dial to
directional signal housing; remove retainer and dial
face from housing.
2.
Remove cap and bulb.
3.
Replace bulb and cap, then position dial and retainer
to housing.and install attaching screws.
Fig.
20 - Dial Quadrant Lamp — Chevrolet
1.
Upper Cover
2.
Shield
3. Lamp and Socket
4.
Dial Pointer
5.
Lower Cover
CHEVROLET CHASSIS SERVICE MANUAL