headlights PONTIAC FIERO 1988 Service Repair Manual

OB-4 MAINTENANCE AND LUBRICATION
Tire and wheel operation - Be alert to a vibra-
tion of the steering wheel or seat at normal highway
speeds. This may mean a wheel balance is needed. Also, a
pull right or left on a straight, level road may show the
need for
a tire pressure adjustment or wheel alignment.
Steering system operation - Be alert to
changes in steering action. An inspection is needed when
the steering wheel is harder to turn or has too much free
play or if unusual sounds are noted when turning or
parking.
Headlight aim operation - Take note of light
pattern occasionally. If beam aim doesn't look right,
headlights should be adjusted.
AT EACH FUEL FILL
Engine oil level check - Check engine oil level
and add if necessary. See your Owner's
Manual for further
details.
NOTICE: A large loss in this system may indicate a
problem. Have it inspected and repaired at once.
Engine coolant level and condition - Check
engine coolant level in coolant reservoir tank and add if
necessary. Replace if dirty or rusty. See your Owner's
Manual for further details.
NOTICE: A large loss in this system may indicate a
problem. Have it inspected and repaired at once.
Windshield washer fluid level check -- Check
washer fluid level in container and add if necessary.
Hood latch operation - When opening hood on
cars equipped with hoods that open from the front, note
the operation of secondary latch. It should keep hood from
opening all the way when primary latch is released. Make
sure that hood closes firmly.
AT LEAST MONTI-ILY
Tire and wheel inspection and pressure
check--
Check tires for abnormal wear or damage. Also,
check for damaged wheels. Keep pressures as shown on
Tire Placard on the driver's door (include spare unless it is
a stowaway). Pressure should b\: checked when tires are
"cold". See "Tires" in Owner's Manual for further
infomation.
Light operation check - Check operation of
license plate light, side-marker lights, headlights includ-
ing high beams, parking lights, taillights, brake lights.
turn signals, backup lights, instrument panel and interior
lights and hazard warning flashers.
Fluid leak check - After the car has been parked
for a while, inspect the surface beneath the car for water,
oil, fuel or other fluids. Water dripping from the air
conditioning system after use is normal. If you notice fuel
leaks or fumes, the cause should be found and corrected at
once.
AT LEAST TWICE A YEAR (FOR EXAMPLE,
EVERY SPRING AND FALL)
Power steering pump fluid level check --
Check power steering pump fluid level in accordance with
Owner's Manual instructions and keep at proper level.
NOTICE: A large loss in this system may indicate a
problem. Have it inspected and repaired at once.
Brake master cylinder reservoir fluid level
check ---- Check fluid and keep at proper level. Note: It is
normal for the brake fluid level to go down slightly as the
brake pads wear
- so be sure to keep reservoir filled.
NOTICE: A large loss in this system may indicate a
problem. Have
it inspected and repaired at once.
Clutch system service --- manual transmis-
sionltransaxle --- For cars equipped with hydraulic
clutch system, check the reservoir fluid level and add fluid
as required. All others, check clutch pedal free travel and
adjust as necessary. See your Owner's Manual for further
details.
~
NOTICE: A large loss in this system may indicate a
problem. Have it inspected and repaired at once.
Weatherstrip Lubrication - Clean surface and
then apply a thin film of silicone grease with a clean cloth.
EACH TIME OIL IS CHANGED
Automatic and manual transmissionltrans-
axle fluid level check - Check transmission/transaxle
fluid level and add as required. (Corvette only) if equipped
with manual transmission
- check fluid in the overdrive
unit and add as required.
NOTICE: A large loss in this system may indicate a
problem. Have
it inspected and repaired at once.
Brake systems inspection - For convenience,
the following should be done when wheels are removed
for rotation: Inspect lines and hoses for proper hookup,
binding, leaks, cracks, chafing, etc. Inspect disc brake
pads for wear and rotors for surface condition. Also in-
spect drum brake linings for wear and cracks. Inspect
other brake parts, including drums, wheel cylinders, park-
ing brake, etc. at the same time. Check parking brake
adjustment.
INSPECT BRAKES MORE OFTEN IF DRIVING
HABITS OR CONDITIONS RESULT IN FREQUENT
BRAKING.
Steering, suspension and front drive axle
boot and seal inspection
- Inspect front and rear
suspension and steering system for damaged, loose or
missing parts, signs of wear or lack of lubrication. Inspect
power steering lines and hoses for proper hookup, bind-
ing, leaks, cracks, chafing, etc. (On cars equipped with
manual steering gear, check for seal leakage.) On
front-
wheel-drive cars, clean then inspect drive axle boot seals
for damage, tears or leakage. Replace seals if necessary.
Exhaust system inspection - Inspect complete
system. Inspect body near the exhaust system. Look for
broken, damaged, missing or out-of-position parts as well
as open seams, holes, loose connections or other condi-
tions which could cause a heat buildup in the tloor pan or
could let exhaust fumes seep into the trunk or passenger
compartment.

CHASSIS SHEET METAL 2@-7
3. During the above flash time period (1 to 10 min-
utes), apply appropriate "conventional" interior acrylic lacquer color as required and allow
painted part to dry for
4 to 5 hours before install-
ing on car.
RlGlD OW HARD ABS PMS"TIC PARTS
Rigid or hard ABS plastic requires no primer.
"Conventional" interior acrylic lacquers adhere satis-
factorily to hard ABS plastics.
Procedure
1. Wash part thoroughly with a cleaning solvent
(Acrylic-Clean, Pre-Kleano, Prep-Sol or equiv-
alent) to remove any dirt or grease.
2. Apply appropriate "conventional" interior
acrylic lacquer color. Apply only sufficient
color for proper hiding to avoid washout of
"grain" effect.
3. Allow to dry and then install part.
VINYL AND FLEXIBLE (Son) ABS
PLASTIC PARTS
The outer cover or skin material of "flexible"
instrument panel cover (pad) assemblies is made of an
ABSIPVC plastic blend. The same is true of many
"padded" door trim assemblies. The soft cushion pad-
ding under the I.P. skin is urethane foam plastic. The
most widely used
"flexible" vinyls (poly vinyl chlo-
ride)
are coated fabrics, such as used in seat trim,
some door trim assemblies, molded headlining panels
and sun visors. Most head rests are "flexible" vinyls.
Examples of "hard vinyls are: door and front seat
back assist handles and coat hooks.
The paint system of vinyl and flexible ABS
plastic involves the use of interior "vinyl" color and a
clear vinyl top coat.
Procedure
1. Wash part thoroughly with a vinyl cleaning and
preparation solvent ("Vinyl Press"
- Ditzler,
"Vinyl Prep Conditioner"
- Detroit Autobody
or equivalent) to remove greasy film or silicone.
Wipe off cleaner while still wet with clean,
lint-
free cloth.
2. Immediately after wiping face dry, apply inte-
rior "vinyl" color in wet coats allowing suffi-
cient flash time between coats (see label
directions on can). Use proper "vinyl" color as
designated by interior trim combinations. Apply
only sufficient color for proper hiding to avoid
washout of "grain" effect. No primer or
primer-
sealer is required.
3. Before the final vinyl color coat has dried, apply
two coats of clear vinyl top coat spray (instru-
ment panels will require the "nonglare" clear top
coat). Do not allow the first spray coat to com-
pletely dry before spraying on the second. Use
top coat with appropriate gloss level to match adjacent similar components. This
clear coat is
necessary to control the gloss requirement and
prevent
'tracking" (rubbing-off) of the color
coat after drying.
4. Allow to dry according to label directions before
installing part.
ON-VEHICLE SERVICE
CONCEALED HEADLIGHTS
The concealed headlights used on this model are
electrically operated. When the headlights are turned
on, solid state circuitry activates the actuators. This
same circuitry senses when the actuators stop moving
and removes the ground to deactivate the actuators.
When the headlights are turned off, the actuators run
in opposite direction closing the headlight doors.
Should an electrical failure occur in the head-
light circuit, they may be raised manually by rotating
the knob on the actuator in a counterclockwise direc-
tion until the headlights are fully open. The headlights
may be lowered by rotating the knob on the actuator in
a clockwise direction until the headlights are fully
closed.
For electrical circuit information and diagnosis,
refer to Section
8A of this manual.
If it is desired to raise the headlights with the
lights off, either of the following procedures may be
used:
1. Turn the lights on. After the headlights are
open, disconnect the electrical connections at
the actuator connectors. Turn the lights off. The
headlights will now remain in the open position.
2. Turn the parking lights on. Depress the head-
light rocker switch lightly. The headlights may
then be raised "up" fully with the lights off.
Adjust
Because of the number of adjustments possible
and the number of attaching points of the concealed
headlight body assembly
(9), only those attachments
which control the adjustment desired should be loos-
ened. Make one
adjbstment at a time.
NOTICE: The headlight door does NOT have
slotted mounting holes and therefore is not
adjustable by itself. This insures proper clearance
between the headlight door and the hood and
fenders in both the raised and lowered positions.
The entire headlight body assembly must be
adjusted to achieve the desired appearance and
fit. Care should be exercised when adjusting the
headlight body assembly. Severe hammer blows could damage the die cast aluminum headlight
body assembly.
TO RAISE OR LOWER the headlight body
assembly, proceed as follows:
1. Open hood.
2. Raise headlights.

26-8 CHASSIS SWEET METAL
3. Remove headlight bezel.
4. If necessary, move battery rearward to gain
access to rear screw.
5. Lower headlights.
6. Loosen two body screws and adjust headlight
body.
7. If a satisfactory appearance is still not obtained,
remove lower air deflector to gain access to
number 1 and number 2 screws.
8. Loosen two body screws and adjust headlight
body.
9. Repeat procedure, if necessary, to obtain a satis-
factory appearance.
10. Re-position battery and tighten hold-down
screw to specifications.
11. Install lower air deflector.
12. Install headlight bezel.
TO SET FRONT TO REAR
GAP between
headlight door and hood, proceed as follows:
1. Open hood.
2. Raise headlights.
3. Remove headlight bezel.
4. Lower headlights.
5. Loosen two body assembly screws and adjust
headlight body assembly.
6. If a satisfactory appearance is still not obtained,
remove lower air deflector to gain access to two
lower screws.
7. Loosen two lower screws and adjust headlight
body assembly.
8. Repeat procedure, if necessary.
9. Install lower air deflector.
10. Install headlight bezel.
TO SET SIDE-TO-SIDE GAP between head-
light door and hood and headlight door and fender,
proceed as follows:
Open hood.
Raise headlights. Remove headlight bezel.
If necessary, move battery rearward to gain
access to rear screw.
Lower headlights.
Loosen three body screws and adjust headlight
body.
If a satisfactory appearance is still not obtained,
remove lower air deflector to gain access to two
lower screws.
Loosen two lower screws and adjust headlight
body.
Repeat procedure, if necessary.
Re-position battery and tighten hold-down
screw to specifications.
Install lower air deflector.
Install headlight bezel. TO
SET CONTOUR of headlight door to hood,
proceed as follows:
1. Open hood.
2. Raise headlights.
3. Remove headlight bezel.
4. Lower headlights.
5. Loosen two (2) screws and adjust headlight
body assembly.
6. If a satisfactory appearance is still not obtained,
remove lower air deflector to gain access to two
lower screws.
7. Loosen two lower screws and adjust headlight
body assembly.
8. Repeat procedure, if necessary.
9. Install lower air deflector.
10. Install headlight bezel.
HEADLIGHT BODY ASSEMBLY
Remove or Disconnect
1. Rear headlight door attaching screws.
2. Raise headlight doors.
3. Headlight bezel attaching screws.
4. Front headlight door attaching screws and
remove headlight door.
5. Electrical connection at bulb.
6. Lower air deflector (one side only).
7. Headlight body assembly attaching screws and
disconnect electrical connection at actuator
connector.
8. Link.
9. Actuator crank arm.
10. Actuator retaining screws and remove actuator.
11. Unhook headlight capsule lower retaining
spring and remove headlight capsule assembly.
12. Headlight body assembly attaching brackets and
fasteners.
Install or Connect
1. Headlight body assembly attaching brackets and
fasteners.
2. Headlight capsule lower retaining spring and
install headlight capsule
3. Acuator retaining screws and install actuator.
4. Actuator crank arm.
5. Link.
6. Headlight body assembly attaching screws and
connect electrical connection at actuator
connector.
7. Lower air deflector (one side only).
8. Electrical connection at bulb.
9. Front headlight door attaching screws and install
headlight door.

2C-14 CHASSIS SHEET METAL
J10259-2C-F
Figure 5 Concealed Headlights

8B-2 ENGINE ELECTRICAL
NO CRANKING, NO SOUND FROM SOLENOID
I TURN HEADLIGHTS AND DME LITE ON
TURN KEY TO START I
TEST BETTERY.
IF OK. REPAIR
.5 VOLT OR MORE a
OSITION, (POS. LEAD 0
GROUND CABLE CONN. ANDlOR REPLACE
CABLE.
CLEAN AND TIGHTEN
POS. BATTERY CABLE
TERMINALS
ANDlOR REPLACE CABLE. CONNECTOR.
FUSIBLE
CHECK CONNECTIONS
AND VOLTAGE AT
SOLENOID
"S' TERM.
LESS THAN
7 VOLTS b
FAULTY PURPLE WITH KEY IN START,
WIRE TO STARTER CHECK
VOLTAGE AT
G20201-6D
Fig. 1 Electrical System General Diagnosis - 1 of 2
GENERAL ELECTRICAL SYSTEM DIAGNOSIS 6D3 - Charging System
6D4
- ~~nitcon-§~stem Diagnosis and repair procedures for engine
6D5 - Engine Wiring
electrical subsystems are located in the following
subsections: Where a
"driveability" complaint
exists, or an
ECM code is set, go to Section
6E. Wiring diagrams,
6D
1 - Battery component locations and system checks are located in
6D2
- Cranking System Section 8A.

CONTENTS
ELECTRICAL DIAGNOSIS
Cell
1
2
3
4 5
10
11
12 14
20
21
22
23
30
31
33
34
40
4
1
60
61
62
63
64
65
66
67
68
Index
Introduction
Symbols
Troubleshooting Procedures Repair Procedures
Power Distribution
Fuse Block Details
Light Switch Details
Ground Distribution
Engine:
V6 VIN S
Engine: V8 VIN
F
Engine: V8 VIN E
Engine:
V8 VIN 8
Starter and Charging System
Coolant Fans
Vehicle Speed Sensor
Cruise Control Horns
Brake Warning System
Heater
Defogger
Air Conditioning: System Check
Air Conditioning: Blower Controls
Air Conditioning: Compressor Controls
Air Conditioning: Air Delivery
Air Conditioning: Blower Controls
Air Conditioning: Compressor Controls
Air Conditioning: Air Delivery Cell
77
8
1
82
86 90
9
1
100
102
103
110
111
112
114
117
120
130
133
134
135
141
143
145
150
151
201 202
203
Warnings and Alarms: Chime
Instrument Panel: Gages Cluster
Instrument Panel:
Digital Cluster
Driver Information Center
(DIC)
WiperlWasher
WiperlWasher: Pulse
Headlights
Headlight Doors
Headlights with Lamp Monitor
Exterior Lights
Exterior Lights with Lamp Monitor
Back Up Lights
Interior Lights
Interior Lights Dimming
Power Windows
Power Door Locks
Theft Deterrent
Hatch Release
Hatch Pull-Down
Power Mirrors
Automatic Day-Night Mirror
Lumbar Support
Radio Power Antenna
Component Location Views
Harness Connector Faces
Harness Routing Views

INDEX
Page
................... Front Marker 110-0
...................... Frontpark 110-0
......................... Hazard 110-0
........ Hazard with Lamp Monitor 111-0
..................... Headlights 100-0
........................ Doors 102-0
............ With Lamp Monitor 103-0
................. Nigh Level Stop 110-0
................... License 110.3,11 0.4
Park
........................... 110-0
............... Rear Marker 110.3,11 0.4
stop
........................... 110-1
...................... Tail 110.3,11 0.4
................ Tail with Monitor 111-2
Turn ........................... 110-0
Lights (Interior)
.............. Cargo Compartment 114-1
....................... Courtesy 114-0
.......................... Dome 114-0
...................... Glove Box 114-0
................. Lights Dimming 117-0
........................ Reading 114-0
................ Light Switch Details 12-0
.................... Mirrors (Power) 141-0
Automatic
DayINight ............ 143-0
................. Power Distribution 10-0
Radio
...................... With UK3 150-0
With
UK3 and Subwoofer
..................... Amplifier 15 0-2
Without Subwoofer Amplifier and
with
UK3 ..................... 150-5 With
Subwoofer Amplifier and
without UK3
..................
.................. Repair Procedures
Seats (Power)
Lumbar Support
.................
Starter ............................
........................... Symbols
........... Theft Deterlent (Passkey)
......... Troubleshooting Procedures
.................. Hatch Pull-Down
..................... Hatch Release
............... Vehicle Speed Sensor
Warnings (Audible)
Chime
.........................
................... Windows (Power)
WiperIWasher
With Pulse .....................
................... Without Pulse
Page

INTRODUCTION
COMPONENT LOCATIONS
When you are ready to locate the schematic
components on the car, use the Component
Locations List, see figure 2.
Listed in the left hand column are the com-
ponents shown on the schematic. Next to the
Convenience Center is the location, "Under
LH side of
I/P." Reference to LH and RH is
made as though the troubleshooter
was sitting
in the driver's seat. On the same line, in the far
right column, is a page-figure reference. In this
case, you are directed to figure
A on page 201-6.
Where connectors are listed, the number of
cavities is provided. This represents the total
number of cavities in the connector, regardless
of how many are actually used. This informa-
tion is provided to help you identify connec-
tors on the car.
Grounds are listed next in the table. The
location description for
GlOl reads, "LH front
of engine compartment, behind headlights
panel. "You are directed to page 201-8, figure D.
Nearly every component, connector, ground
or splice shown on a schematic can be pin-
pointed visually by using the Component Loca-
tion Views' figures.
COMPONENT LOCATION Page-Figure
COMPONENTS
........................ Convenience Center .............. Under LH side of IIP 201-6-A
..................... ........................ Fuse Block Under LH side of IIP 201-6-A
....................... Horn BrushISlip Ring ............ Under steering wheel. 201-5-E
....................... Horn
Switch .................... Under steering wheel. 201-5-E
CONNECTORS
............................ ................ ClOO (46 cavities)
LH side of dash 201-5-B
................ .............. C201 (11 cavities) Under
LH side of IIP, near C100. 201-5-F
GROUNDS
.......................... GlOl LH front of engine compartment, behind
.......................... headlights panel. 201-8-D
SPLICES
.......................... S139. Front lights harness, behind LH front light panel 201-8-C
.......................... S212. IIP harness, behind IIP, above steering column. .. 201-6-B
Figure 2 - Typical Entries In The Component Location List

Ground Distribution
Figure 8 is a sample Ground Distribution
schematic for the Headlights. It shows exactly
which compcments share each ground. This
information can often be a time-saver when
troubleshooting ground circuits.
For example, if both Headlights and the
ParkITurn Light on one side are all out, you
could suspect an open in their common ground
wire or the ground connection itself. On the
other hand, if one of the lights works, you
know that the ground and the wire up to the
splice are good. You
have learned this just by
inspecting the schematic and knowing the
vehicle's symptoms. No actual work on the
lighting system was needed.
GROUND DlSTRlBUTlON (GI01 AND 6102)
FRONT LIGHTS GROUNDS
LH HlGH BEAM LH - DUAL
BEAM
LIGHT - HEADLIGHT HEADLIGHT RH
- DUAL
BEAM
HEADLIGHT E!! &T HIGH BEAM PARKiTURN HEAilLlGHT 1-
Figure 8 - Typical Ground Distribution Schematic

TROUBLESHOOTING PROCEDURES
The following four-step troubleshooting pro-
cedure is recommended:
Step 1: Check the problem.
Perform a System Check to be sure you
understand what's wrong. Don't waste time
fixing part of the problem! Do not begin dis-
assembly or testing until you have narrowed
down the possible causes.
Step 2: Read the Electrical Schematic.
Study the schematic. Read the Circuit Oper-
ation text if you do not understand how the
circuit
should work. Check circuits that share
wiring with the problem circuit. The names of
circuits that share the same fuse, ground,
switch, etc., are included on each electrical
schematic. (Shared circuits are also shown on
Power Distribution, Ground Distribution,
Fuse Block Details, and Light Switch pages.)
Try to operate the shared circuits. If the
shared circuits work, then the shared wiring is
OK. The cause must be within the wiring used
only by the problem circuit. If several circuits
fail at the same time, chances are the power
(fuse) or ground circuit is faulty.
Step 3: Find the Cause and Repair.
* Narrow down the possible causes.
@ Use the Troubleshooting Hints.
@ Make the necessary measurements as
given in the System Diagnosis.
Step 4: Test the Repair
Repeat the System Check to be sure you
have fixed the whole problem.
Example
A customer brings in a car and says that the
high beams do not work.
Step 1: Perform a System Check on the Head-
lights Circuit. You may discover that both low
beams operate. In
"Hi," you may notice that
the High Beam Indicator comes on, but neither
high beam operates.
INSTRUMENT PANEL PRINTED CIRCUIT
DISTRIBUTION
@ Before you replace a component, check
power, signal, and ground wires at the
component harness connector. If these
are
OK, the component must be bad. Figure 9 - Typical Headlights Schematic