1988 PONTIAC FIERO turn signal

7C-6 CLUTCH
6. Clutch master cylinder push rod to clutch pedal.
7. Install brake switch.
8. Install hush panel.
9. Install steering column trim cover.
10. Install clutch reservoir to bracket.
1 1. Hoist vehicle.
12. Pilot slave cylinder into clutch fork.
NOTICE: With a new system, the slave cylinder
contains a shipping strap that pre-positions the
push rod for installation, and also provides a
bearing insert.
Follojving installation of the slave
cylinder, the first actuation of the clutch pedal will
break the shipping strap and give
normal system
operation.
13. Install slave cylinder and heat shield to bell
housing.
14.
Lojver vehicle.
15. Connect negative battery cable.
CLUTCH ASSEMBLY
Removal
1. Remove the transmission as outlined in
transmission section.
2. Remove the slave cylinder heat shield and slave
cylinder
from flywheel housing.
3. Reniove the flywheel housing.
4. Slide clutch fork from ball stud and remove fork
from dust boot. Ball stud is threaded into clutch
housing and is easily replaced, if necessary.
5. Install Tool 5-33169 to support the clutch
assen~bly during removal. Look for mark or white
painted letter on clutch cover and
"X" mark on
flywheel. If
"Xu or letter is not evident, mark
flywheel and clutch cover for indexing purposes
during installation.
6. Loosen clutch-to-flywheel attaching bolts evenly
1 turn at a time until spring pressure is released.
7. Remove clutch and pressure plate assembly.
lnspection
Inspect the flywheel for cracks, heat checking or
other defects. Replace or repair as required.
Installation
Pressure plate and flywheel face, (They should be
free of oil, grease, metal deposits or burned spots.)
Installation
1. Position clutch disc and pressure plate in relative
installed position and support them with
alignment Tool J-33169 or a drive gear.
The driven disc is installed with the damper
springs to the transmission. The flywheel side is
marked.
2. Turn clutch assembly until "X" mark or white
painted letter on cover lines up with
"X" mark on flywheel,
then align cover bolt holes to nearest
flywheel holes.
3. Install a bolt in every hole and tighten down
evenly and gradually until tight to avoid possible
clutch distortion. (Cover loads are as high as
1- 1/4 tons).
4. Remove the pilot tool.
5. Unhook clutch fork and lubricate ball socket and
fork fingers at release bearing end with a high
melting point grease such as graphite and
reinstall fork on ball stud.
6. Lubricate recess on inside of release bearing
collar and the clutch fork groove with light coat
of graphite grease. Refer to Figure 7C-6.
7. Install the clutch fork and dust boot into clutch
housing and install release bearing to fork, then
install flywheel housing.
8. Install the transmission as outlined in
transmission section.
9. Install the clutch slave cylinder and bracket.
CLUTCH PEDAL
Removal
Disconnect the negative cable at battery.
Remove the steering column trim cover.
Remove the hush panel from under dash.
If equipped, disconnect cruise control switch at
clutch pedal.
Disconnect the neutral start switch at clutch
pedal.
Renlove the turn signal and hazard flasher
mounting bracket attaching screws.
Disconnect the clutch master cylinder push rod
from pedal.
Remove the nut from clutch pedal pivot bolt. Pull
bolt out far enough for pedal removal.
Inspection
Clean and inspect all components and replace as
necessary. Do not clean bushings with a cleaning
solvent, simply wipe with a clean cloth.
Relubricate all bushings and moving parts.
Installation
1. Reverse the removal procedure.
PILOT BEARING (FIGURE 7C-7)
Replacement
The clutch pilot bearing is an oil impregnated type
bearing pressed into the crankshaft. This bearing requires
attention when the clutch is removed from the vehicle, at
which time it should be cleaned and inspected for exces-
sive wear or damage and should be replaced if necessary.
To remove, install Tool
J 23907 and remove bearing
from crankshaft, as shown in Figure
7C-7. In replacing
this bearing, use Tool
J 1522. Place bearing on pilot of
tool with radius in bore of bearing next to shoulder on tool
and drive into crankshaft. Lubricate with several drops of
machine oil.

CRUISE CONTROL
(Continued from previous page)
TEST I: RIA CIRCUIT OPEN
Disconnect C223 and check switch continuity
between terminals A (BLU) and C (YEL) of the
pin half of the Cruise Switch in RIA.
0 If the switch is open, replace the Multi-Func-
tion Lever.
If the switch is not open, check for an open in
the
GRYIBLK (87) wire between terminal C
of connector C223 at terminal M of the Mod-
ule.
TEST J: VENT CIRCUIT SHORT
Remove the connector from the Servo and mea-
sure resistance between terminals
A and C of
the Servo.
If it is less than 30 ohms, replace the Servo.
If it is 30 ohms or more, check for a short to
ground in the DK
BLUIWHT wire from ter-
minal C of the Module to terminal A of the
Servo.
TEST K: VSS ClRCUlT OPEN
If the VSS light does not come on, or the volt-
age between terminals A (GRY) and D (BRN)
remains less than 7 volts, check for an open in
the BRN (437) wire or the RED (381) wire from
the Vehicle Speed Sensor Buffer. Refer to page
33-0 for diagnosis of Vehicle Speed Sensor.
TEST L: VSS CIRCUIT SHORT
If the VSS lights does not go off or Battery
voltage remains between ter
and D
(BRN), check for a short to ground on the
BRN (437) wire or the RED (381) wire from the
Vehicle Speed Sensor Buffer. Refer to page 33-0
for diagnosis of Vehicle Speed Sensor.
TEST M: VACUUM SYSTEM
1. Check for a blocked or leaking vacuum
source.
2. If the vacuum source is good, plug the Vac-
uum Release Port and repeat Test
6 of the
Isolation Test.
If the vacuum now holds the throttle open,
replace or repair the Vacuum Release Valve
or the hose to it.
If the test still fails, replace the Cruise Con-
trol Servo.
TEST N: SPS CIRCUIT SHORT
Disconnect the Cruise Control Servo connector
and repeat Test 7 of the Isolation Test.
If the resistance is now over range, replace
the Cruise Control Servo.
If the resistance is still low, find and repair
the short in the TAN wire from terminal F of
the Cruise Control Module to terminal B of
the Cruise Control Servo.
ClRCUlT OPERATION
The Cruise Control System operates a
mechanical linkage to the throttle by means of a
Vacuum Motor. This is a diaphragm moved by
a vacuum applied to one side. A solenoid oper-
ated valve connects the Vacuum Motor to a
Vacuum Tank. Another solenoid valve vents
the vacuum to reduce the suction. The Cruise
Control Module controls the Vacuum Motor
and the throttle by pulsing these solenoid
valves on and off.
One input to the Module is the vehicle speed.
This input comes from the Vehicle Speed Sen-
sor. If the actual speed signal is different from
the speed that was set into and remembered by
the Module, the Module generates pulses to
change the vacuum and return the vehicle to
the set speed. The Vehicle Speed Sensor is
mounted on the Transmission. Other inputs to
the Module are from the Cruise Switch and the
Set Switch. A disengage input to the Module
comes from a switch on the brake pedal. A
sepe-
rate vacuum shut down of the Cruise Control
comes from the Vacuum Release Valve on the
brake pedal.
The two outputs of the Cruise Control Mod-
ule operate the coils of the Vacuum Valve and
the Vent Valve. Both valves are located in the
Cruise Control Servo. These valves move the
throttle be means of the Vacuum Motor. The
Servo Position Sensor
(SPS) coil senses the
position and motion of the Vacuum Motor. It
feeds this information back to the Module to
provide smooth acceleration while the vehicle is
in Cruise Control.

EXTERIOR LlGHTS
(Continued from previous page)
Park/MarkerflaIl/License UgMs
1. If the Park, Marker and Tail Lights do not
work, cheek the Tail Fuse, Light Switch, and
BRN (9) wires for continuity (see schematic).
2. If the Front Marker and the Park Lights dd not
work, check the connection at 6100 and re-
lated wiring (see schematic).
3. If the Park Lights do not turn off, replace the
Light Switch.
s Go to System Diagnosis for diagnostic tests.
@ Do the tests listed for your symptom in the
Symptom
Able bezaw.
@ Tests follow the Symptom Table.
SYMPTOM arABhE
A: TURN LIGHTS TEST
SYMPTOM
Turn Lights do not
work, but Hazard
Lights work
Hazard Lights do not
work, but Stop Lights
work
Stop Lights do not
work, but Turn
Signals work
Stop-Turn Lights on
one or both sides do
not work
B: HAZARD LIGHTS TEST (TABLE 2)
DO TEST
A: Turn Lights Test
B: Hazard Lights
Test
6: Stop Lights Test
6: Stop Lights Test
Connect: TEST LAMP
At: CONNECTOR C210
(Connected)
Condition:
Ignition Switch: RUN
o If the result is correct, replace the Hazard
Flasher.
1. Go to Table 2.
B: HAZARD LIGHTS TEST (TABLE 1)
Connect: FUSED JUMPER
At: CONVENIENCE
CENTER
Conditions:
r Hazard Flasher: REMOVED
Hazard Switch:
HAZARD
Measure: VOLTAGE
At: CONNECTOR 621 0 (Disconneded)
Condition:
Hazard Flasher: CONNECTED
For
Diagnosis
See 1
Connect
Between
L (PPL) &
Ground
I Measure ( Correct ( For
e If test lamp lights, replace the
ard Switch.
1. Check Turn Flasher and PPE (16) wire for
an open.
Correct
Result
Test Lamp
lights
For
Diagnosis
See 1
Jumper
Between
A (QRN) & B
(BRN)
Between I Voltage I Diagnosis
Correct Result
All Turn
Lights turn on
( If the voltage is correct, replace the Turn- I
(BRN) &
Ground
Hazard Switch.
1. Check ORN (140) and BRN (27) wires for an
open.
6: STOP LIGHTS TEST
At: 6208 (Fernale Half) (Disconnected)
Condition:
Brake Pedal: DEPRESSED and HELD
Battery See 1
Connect
Behvveen
I CEKyy 1 Test Lamp
lights I See 2 I
B (LT BLU) &
Ground
I Ground I I I
Correct
Result
(Continued on facing page)
For
Diagnosis
Test Lamp
lights See 1

EXTERIOR LIGHTS I$
(Continued from previous page)
Front Park Lights
The Front Park Lights can be lit by putting the
Light Switch either in
PARK or in HEAD.
With the Park Lights or Headlights on, battery
voltage is provided through the BRN wires to
both Park Lights. The path to ground for the Park
Lights is
6103 (LH) or 6104 (RN).
The Park Lights will not flash when the turn
signal is on, they will have a steady glow.
Front Marker Lights
The Front Marker Lights can be lit by the Park
Lights or the Turn Lights. Neither of the two
wires to each of the marker bulbs is
a ground
wire.
With the Park Lights on, battery voltage is sup-
plied through the BRN wires to both Marker
Lights. The path
to ground for the marker bulbs
is through the
Turn Lights. The small Marker
Light bulbs light up, but not the larger turn
bulbs.
Lights are on, but not the Park
Lights, battery voltage is applied through the
BLU wires
to the Marker Lights. They glow since
they are grounded through the entire Park Light
system. As before, the small marker bulbs light
up, but not all the parking bulbs. If
both the Park Lights and a set of
lights are on at the same time, the marker
for that side
will not light up. With battery
voltage on both sides of
a bulb, it will not glow.
When the Lights flash off, however, the
marker bulb on that side will come on since
it is
now grounded through the Lights. This
circuit
makes the turn and marker bulbs flash
out of step with each other when the Park
Lights are on.
License, Tail, or Rear Marker Lights
Voltage is applied through the Tail Fuse to the
Light Switch at all times. With the Light Switch
in PARK or
HEAD, voltage is applied through the
fuse and the Light Switch to all of the lights in
this circuit.

EXTERIOR LIGHTS WITH LAMP MONITOR 1 g
(Continued from previous page)
9. If the Stop Lights stay on without the brake
pedal pressed,
adjustlreplace the Brake
Switch.
10. If the Park Lights do not
turn off, replace
the Light Switch.
11.
If only the High Level Stop Light does not
work, check the Brake Switch,
High Level
Stop Eight, the LT
BEUIBLK and YEL
(820) wires, and the BLK (150) wires for an
open.
12. If a
Turn Indicator lights steadily (does not
flash) when the Turn
Signal is on, check the
Turn Lights on that side.
Go to System Diagnosis for diagnostic tests.
SYSTEM DIAGNOSIS
@ Diagnostic steps for the symptoms listed in
the following table are listed after the table.
SYMPTOM TABLE
k The Turn Lights do not work, but the
Hazard Lights work
B: The Hazard Lights do not work, but the
Stop Lights and
Turn Lights work
@: The Stop Lights do not work, but the Turn
Signals work
Lights on one or both sides
do not work
E: The Front Turn Light and Wn Indicator
on one or both sides do not light
A: THE TURN LIGHTS DO NOT MRK,
BUT THE HAZARD LIGHTS WORK
Connect: TEST UMP
At: CONNECTOR 6218 (Connected)
Condition:
@ lanition Switch: RUM 1
Correct For Diagnosis
Connect
Result of Incorrect Setween Results
L (PPL) & Test Lamp
See 1 Ground lights
Jf *.he test lamp lights, replace the Turn-
Hazard Switch.
1. Check the Turn Flasher, BIU Fuse,
and the DK
BLU (75) and PPL (16) wires
for
an open (see schematic).
B: THE HAZARD LIGHTS DO NOT WORK,
BUT THE STOP LIGHTS AND BURN
LIGHTS WORK (TABLE 1)
At: CONVENIENCE CENTER (Disconnected)
Conditions:
e Hazard Flasher: REMOVED
* Hazard Switch: HAZARD
Jumper Correct For Diagnosis
Result of
Incorrect
Betvveen Results
B (BRN) & A All
the Turn
I (ORN) I Lights light I See 1 I
If the result is correct, replace the Hazard
Flasher.
1. Go to Table 2.
B: THE HAZARD LIGHTS DO NOT WORK,
BUT THE STOP LIGHTS AND TURN
LlGMTS WORK (TABLE 2)
Connect: TEST WMP
At: CONNECTOR 6210 (Connected1
For Diagnosis
Connect
of incorrect 1 Bemeen I Resun 1
K (BRN) & Test Lamp
Ground lights
If the result is correct, replace the Turn-
Hazard Switch. 1
1. Check the ORN (140) and BRN (27) wires
for an open (see schematic).
C: THE STOP LIGHTS DO NOT WORK
BUT THE TURN SIGNALS WQR:'" -. .-
Connect: TEST EAMP
At: CONNECTOR C208 (Connected1
Condition:
r Brake Pedal: DEPRESSED
Connect Correct
For Diagnosis
Result of
Incorrect
Between Results
B (LT BLU) & Test Lamp
lights See 1 Ground
If the test lamp lights, with Trans Am,
check
WHT (17) wire for an open, then re-
place
TurnJHazard Switch if WHT wire is
good. With Firebird, check
LT BLU (20)
wire for an open (See schematic).
1.
ChecWadjust the Brake Switch, and check
the
WWT (17) and ORN (140) wires for an
open (see schematic).
(Continued on facing page)

Continued from previous page)
Note: VVhen the PASSKEY Decoder Module
is replaced, the new key code may not
match the code in the owner's existing
keys. If it does not match, then new
keys must be made. Use the key
duplication procedure.
1. Check YEL (921) and BRN (922) wires for
shorts to ground or between the two
wires.
2. Check
UEL (921) and BRN (922) wires for
an open. If
engine does not crank, go to page 30-0 for
diagnosis of Starter and Charging Circuits.
C3. Reconnect the Starter Enable Relay and
connect a fused jumper from terminal A3
(DK GRN) wire of the PASSKEY Decoder
Module to ground. Ignition Switch to
START.
0 If engine cranks, replace the PASSKEY
Decoder Module.
If engine does not crank, check the DK
GRN (965) wire for
an open. If wire is OK,
replace the Starter Enable Relay.
6: STARTER ENABLE RELAY TEST
D: ECM ENABLE SIGNAL TEST
C2. Connect a fused jumper between terminals
Measure: VOLTAGE
At: STARTER ENABLE RELAY CONNECTOR
(Disconnected)
Condition:
0 Ignition Switch: START Measure:
VOLTAGE
At: PASSKEY DECODER MODULE
CONNECTOR (Connected)
Condition: 0 Ignition Switch: RUN
Measure
Between
&
Ground
&
Ground
Measure
Between I I For Diagnosis ( Voltage
1 I 5Volts I See 1 1
If voltages are correct, go to C2.
1. Check YEL (5) wire for an open. If wire is
good but voltage is not present, go to
8A-30 for diagnosis of Starter and Charg-
ing Circuits.
Correct
Voltage
Battery
Battery
I I
Ignition Switch: START
For Diagnosis
See 1
See 1
0 wait four minutes from last time Ignition
Switch was turned to OFF to
allow PAS-
SKEY Internal timer to reset.
I A2 IPPL)& ) 2 to3Volts I See2 i Ground
If voltages are correct, cranking Fuel
Enable signal is operating normally,
return to Symptom Table.
E (YEL) Vfire and A (DK GR wire 1 1. Check PPL (963) wire for an open. A of the Starter Enable Relay Connector. I I
(Continued in next column)
Ignition Switch to START.
If engine cranks proceed to
63.
Continued from previous column)
2. Replace PASSKEY Decoder Module.
Note: When the PASSKEY Decoder Module
is replaced, the key code
it is set for
may not match the code in the owner's
keys. If
it does not, then new keys
must be made. Use the procedure
under
Duplicgti~n of-Keys2
E: SECURITY INDICATOR OPEN TEST
CONNECTOR (Disconnected)
Condition:
KEY DUPLICATION PROCEDURE
Key Replacement (Spare Key Available)
The 535628 Interrogator or equivalent must
be used to det e
the proper electrical code
of the key.
1. Insert the customer's spare ignition key into
the Key Code Reader on the 535628 Inter-
rogator.
2. Press the On-Off rocker switch to the ON
position.

THEFT DETERRENT SYSTEM: PASSKEY
3. A number from 1 to 15 will appear in the
window designating the electrical code of
the key.
4. Cut a new key having the electrical code
ed from the 535628 Interrogator.
5. Start the engine using the new key to insure
that the key is correct both mechanically
and electrically.
Key Replacement (No Spare Key Available)
1. If the Ignition Key is lost and there is no
spare key, determine the mechanical code
from the code on the Ignition Key Lock
CyE
inder. The code may also be det
the dealer invoice for the car, or from the
Chewolet Zone Office.
2. Cut anew key to this mechanical code. Use a
blank PASSKEY test key which has no
resistance pellet. This key will be used to
operate the Ignition Switch for the remain-
ing steps.
3. Remove the hush panel under the steering
column and disconnect
C281 (two-cavity
connector leading into the steering column).
4. Insert the male half of the connector into the
female
pigtail connector from the 535628
Interrogator.
5. Set the Key Code Selector on the
Hnter-
rogator (535628 or equivalent) to "1 ".
6. Attempt to start engine using the key made
in step 2.
r If engine starts, the Key Code Selector is set
to the correct electrical code. Cut a new key
having this electrical code. The new key will
be customer's replacement key.
If engine does not start, turn Ignition
Switch to OFF, then turn the Key Code
Selector to the next higher position. Wait
four minutes and attempt to start the engine
using the new electrical code. Use the 4-min-
ute Timer on the 535628 Interrogator to
indicate the 4-minute interval. Start the
Timer by depressing the "Start" rocker
switch. The red indicator
will turn off at the
end of a four minute interval.
CIRCUIT OPERATION
Resistor senshg contacts are located in the
Ignition Key Lock Cylinder. These contact the
Key Resistor Pellet on the key when it is
inserted. When the lock is rotated, battery is
applied through the
CIH Fuse to the PASSKEY
Decoder Module. The Pellet resistance is then
colnpared against a fixed resistance in the Mod-
ule.
If the Key Pellet is the proper resistance, ter-
minal A3 is grounded, energizing the Starter
Enable Relay. At the
same time, a signal is
appfied at terminal A2 to enable the Electronic
Control Module
(ECM). When this signal is
received by the Electronic Control Module
(ECM), it allows fuel injector pulses to begin.
If the Key Resistor Pellet is the wrong
value,
the PASSKEY Decoder Module will shut down
tes. During this interval there
will be no output at terminals A3 or
A2.
If the Ignition Switch is turned on again dur-
ing this interval, the Timer will begin over
again and the PASSKEY Decoder Module
will
remain shut down for another 2 to 4 minutes.
The PASSKEY Decoder Module will continue
this process even if a key with the correct pellet
is used to turn the ignition back on. The Timer
is restarted by the ignition voltage at
t
A1 when Ignition Switch is turned to RUN.
Once the Timer has completed its
2 to 4 min-
ute cycle with the ignition off, the PASSKEY
Decoder Module and Timer are reset. A key
having the correct code can then be used to
start the engine.
The Security Indicator is controlled directly
by the PASSKEY Decoder Module. If there is a
PASSKEY Failure this indicator will be
grounded by the PASSKEY
Decoder Module
with the ignition in RUN,
BULB TEST or
START. When the Ignition Switch is first
placed in
RUN, BULB TEST or START the
Indicator lights for about 2 seconds as a bulb
check.

RADIO
(Continued from previous page)
1. Remove the Cancel Cam. Inspect the Slip
Rings on the Cancel Cam and the spring
loaded contacts on the Turn Signal
Switch. Replace as necessary. Incorrect
or missinglubricant on the Cam can cause
premature failure. Take care to keep lubri-
cant or any foreign material away from
the
LED'S and receptors as it will hinder
or prevent proper operation. The correct
lubricant is part no.
26002312.
F: OPTICAL SLlPRlNG TEST (TABLE 2)
Measure: VOLTAGE
At: TOOL J-35630 (Connected)
Conditions:
@ Engine running
0 Press the Preset, Mute and RCL buttons
or the Seek, Scan, and
AMIFM buttons
on the Remote Control Head
sirnultaneoulsy
0 Turn the steering wheel slowly while
measuring
Measure
Correct I For Diagnosis I
I I Between 3.0 1 I Terminal C & and 4.5 volts
1 Ground 1 at all wheel
I 1 positions I I
I . If the voltage is correct, go to Table 3. (
1. Replace the Remote Control Head. Refer
to Section
3B5 for replacement pro-
cedures.
F: OPTICAL SLlPRllUG TEST (TABLE 3) H: NOlSE DIAGNOSIS
Remove the Cancel Cam. Refer to Section Unplug
the Antenna at the back of the Radio.
3B5 for removal procedures.
If noise disappears, it was being picked up
0 Make the following measurements.
by the Antenna. Consult the Delco Sound
Service Guide for Antenna noise diagnosis.
If the noise persists, it is coming in the Radio
wiring. Refer to the following chart for a
possible cause and corrective action.
At: CONNECTOR 6210 (Connected)
@ Ignition Switch: RUN
Shield the Turn Signal Switch Light
Receptors from outside light with a dark
1. Replace the Turn Signal Switch. Refer to
6: ANTENNA TEST
Check connectors Radio and Antenna ends of
Antenna Coaxial Cable. Connect a known good
test Antenna to the Radio. The test Antenna
must be designed for use
with ARC Radios, as
ARC Radios use a different size Antenna con-
nector than conventional Radios.
@ If Radio plays, replace the Antenna.
If Radio still does not operate, send Radio to
an authorized AC-Delco repair station.
Refer to section 9A for removal and replace-
ment procedures.