1988 PONTIAC FIERO light

REPAIR PRQCEDURES
-Crimp the new terminal over the copper
strands (core crimp) as shown in Figure
30. (Use a standard crimping tool,
number
525563 in the Kent-Moore cata-
log.
I
-Solder with rosin core solder.
-Move the cable seal to edge of the insula-
tion.
-Crimp the grips at the end of the terminal
around the cable seal and insulated
wire
as shown in Figure 30 (insulation crimp).
Apply light pressure for this crimp.
Remember to use the proper types of termi-
nals and seals for this repair.
Step Six: Insert the Lead
Before inserting the lead. make certain that
the terminal is correctly shaped (see Figure
281. Then. gently insert the lead from the back.
The terminal should stop or "catch" about
halfway through the connector body. Gently
push back and forth on the lead to be sure the
terminal is held in place in both directions.
If
the terminal easily pushes or pulls out, review
Step Four; "Re-Form the Locking Tang.
"
Be careful to insert leads in their proper loca-
tions.
Step Seven: Replace the Terminal Retainer(s)
(Large Connectors)lSecondary Locks (Small
Connectors)
Replace the terminal retainers by slipping
the retainer halves into the connector body
!as
shown in Figure 31).
To close the secondary locks on small con-
nectors, flip the hinges back to their original
positions (see Figure
32).
I
FEMALE
MALE
Figure 29
- Lead Assemblies
SEAL CORE CRIMP
CRIMP AND SOLDER
CORE CRIMP
SEAL
Figure
30 - Replacing The Terminal OPPOSE
TERMINAL RETAINERS
WHEN REPLACING
Figure 31
- Replacing The Terminal
Retainers (Large Connectors)
SECONDARY LOCK
HINGES
CLOSED ON CONNECTOR BODY
Figure 32 - Closing The Secondary Locks

REPAIR PROCEDURES m I L
REPAlRlNG METRI-PACK SERIES 150
CONNECTORS
(Pull-to-Seat Type)
Metri-Pack connectors are used to connect
various sensors such as the cam, crankshaft
and coolant sensors to primary harnesses in
the engine compartment. The Metri-Pack
connector consists of three parts (see Figure
35): a Pull to Seat type terminal, a connector
body and
a rubber seal which is inserted in
the back of the connector body to provide
environmental protection.
Do
nc: replace the Metri-Pack parts with
parts of other types of connectors and termi-
nals or omit the environmental seals when
repairing Metri-Pack connectors.
Repair instructions are divided into
two
steps, connector disassembly and terminal
removal and connector assembly and termi-
nal insertion. (Refer to figures
33 to 36)
Step One: Connector Disassembly and
Terminal Removal
Insert tool BT-8446 or 535689 into the con-
nector (Figure
33). Pull back on the wire
slightly, pry up the locking tang and then
push the wire through the front of the con-
nector. If the terminal will be reused, reshape
the locking tang.
Step 2: Connector Assembly and Terminal
Insertion
Insert the wire through the seal and the
connector body (Figure
35). Crimp the termi-
nal to the stripped wire. Pull the wire and the
terminal back through the connector body
until it locks in place (Figure
36).
NECTOR TERMINAL
BT8446 LOCKING TANG
Figure 33
- Terminal Removal From Connector Body
TOOL
BT8446
Figure 35 - Connector Reassembly
Figure 36
- Terminal Reinsertion

POWER DISTRIBUTION
CIRCUIT OPERATION
Electrical power for the car is provided by the
Generator when the engine is running. The
schematic diagram shows how each circuit gets
its power. For more details about the Gener-
ator, and connections to the Battery and
Starter, see Starter and Charging System, Sec-
tion
8A-30.
The car's Power Distribution System con-
sists of Fusible Links, Fuses, Circuit Breakers,
the Light Switch and the Ignition Switch. Fusi-
ble Links are short pieces of wire to which they
supply power. They are covered with a special
high-temperature insulation. When conducting
a high current, the Fusible Link will melt and
stop current flow. They are designed to protect
the car's electrical system from electrical
shorts where it is not protected by the Circuit
Breakers and Fuses. See Fuse Block Details
and Light Switch Details for complete wiring to
the first component in each circuit.
The Ignition Switch has six positions, five of
which have detents. The BULB TEST position
is after the RUN position and just before the
START position. BULB TEST does not have a
detent. As shown in the schematic, circuits
which are supplied from the Ignition Switch are
On (Hot) for different switch positions. Indi-
vidual schematics show their fuses supplied
from headings such as "Not In Run. "The head-
ing corresponds to the Ignition Switch position
in which power is On.

BOWER DISTRIBUTION
COMPONENT LOCATION Page-Figure
Auxiliary Coolant Fan Relay
. . . . . . . RH front side of engine compartment. . . . . . . . . .
Blower High Speed Relay. . . . . . . . . . RN front of dash, near Blower Motor . . . . . . . . . .
Burn-Off Relay . . . . . . . . . . . . . . . . . . LH rear corner of engine compartment, on relay
bracket
.................................
Clutch Start Switch . . . . . . . . . . . . . . Above clutch pedal, on clutch pedal support
Cold Start Injector (VIN F) (VIN
8). . Top LH side of engine . . . . . . . . . . . . . . . . . . . . . .
Cold Start Injector (VIN S) . . . . . . . . Top LH rear of engine . . . . . . . . . . . . . . . . . . . . . .
Cold Start Switch (VIN F) (VIN 8). . . Top center of engine. . . . . . . . . . . . . . . . . . . . . . . .
Cold Start Switch (VIN S) . . . . . . . . . Top of engine
Convenience Center
. . . . . . . . . . . . . . Behind IIP, to right of steering column. . . . . . . . .
Coolant Fan Relay (VIN E). . . . . . . . . LN rear corner of engine compartment, on relay
bracket
.................................
Coolant Fan Relay (VIN F) (VIN 8) . . Front of engine compartment, RH side of
radiator support.
. . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Fan Relay (VIN S) . . . . . . . . . LH rear corner of engine compartment, on relay
bracket
.................................
Electronic Control Module (ECM) . . . Behind RN side of UP . . . . . . . . . . . . . . . . . . . . . .
Electronic Spark Timing (EST)
Distributor (VIN E)
. . . . . . . . . . . . . Top rear of engine. . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Spark Timing (EST)
Distributor (VIN F) (VIN
8). . . . . . . Top rear of engine. . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Relay . . . . . . . . . . . . . . . . . LR front of engine compartment, on fender. . . . .
Fuel Pump In-Line Fuse. . . . . . . . . . . RR side of engine compartment, on inner fender
panel
...................................
Fuel Pump Relay (VIN E). . . . . . . . . . LN rear corner of engine compartment, on relay
bracket
.................................
Fuel Pump Relay (VIN F) (VIN 8) . . . LN rear corner of engine compartment, on relay
bracket
.................................
Fuel Pump Relay (VIN S) . . . . . . . . . . LH rear corner of engine compartment, on relay
bracket
.................................
Fuel Pump Switch (VIN E). . . . . . . . . Lower LN rear of engine . . . . . . . . . . . . . . . . . . . .
Fuel Pump Switch (VIN F) (VIN 8) . . Lower LN side of engine . . . . . . . . . . . . . . . . . . . .
Fuel Pump Switch (VIN S) . . . . . . . . . Lower LN side of engine . . . . . . . . . . . . . . . . . . . .
Fuse Block. . . . . . . . . . . . . . . . . . . . . . Behind LH side of IIP, below light switch. . . . . . .
Fusible Link A (VIN E) . . . . . . . . . . . Lower RN side of engine, at Starter Solenoid. . . .
Fusible Link A (VIN F) (VIN 8) . . . . . Lower RH side of engine, at Starter Solenoid. . . . 201- 6-B

POWER DISTRIBUTION
COMPONENT LOCATlON Page-Figure
Fusible Link A (VIN S)
............ Lower RH side of engine. at Starter Solenoid ....
Fusible Link B (VIN E) ............ Lower RH side of engine. at Starter Solenoid ....
Fusible Link B (VIN F) (VIN 8) ..... Lower RH side of engine. at Starter Solenoid ....
............ Fusible Link B (VIN S) Lower
RH side of engine. at Starter Solenoid ....
Fusible Link D .................. Front lights harness. near LH side of dash ......
Fusible Link E ................... Front lights harness. near LH side of dash ......
Fusible Link G .................. Front lights harness. near LH side of dash ......
Fusible Link H (VIN E) ........... RH front of engine compartment. at Junction
Block
...................................
Fusible Link N (VIN F) (VIN 8) ..... LN front of engine compartment. behind battery
Fusible Link H (VIN S)
............ Lower RH side of engine. at Starter Solenoid ....
J (VIN E) ............ Lower RH side of engine, at Starter Solenoid ....
J (VIN F) (VIN 8) ..... Lower RH side of engine, at Starter Solenoid ....
J (VIN S) ............ RH side of radiator support. at Junction Block ..
.................. Fusible Link K RN front of engine compartment. at Junction
Block
...................................
Gear Selector Switch ............. In console, at base of gear selector ............
Hatch Fuse ..................... Attached to side of Fuse Block
Hatch Pull-Down Unit
............ Center of end panel, in cargo compartment .....
Headlight Door Module ........... LH front of dash ...........................
Ignition Coil (VIN S) .............. Rear RH side of engine ......................
Ignition Switch .................. Behind IIP. on top side of steering column ......
In-Line Fuse (VIN F)(VIN 8) ....... On LH side of radiator support. forward of
................................. battery
.................. Junction Block RH front of engine compartment. behind
................................ headlight
Lights Monitoring Module
......... Behind IIP. at base of steering column
Mass Air Flow (MAF) Relay (VIN
F)
........................ (VIN 8) LH rear corner of engine compartment, on relay
................................. bracket
Mass Air Flow (MAF) Relay (VIN S)
. Front of engine compartment. on RH side of
radiator bracket
..........................
Mass Air Flow In-Line Fuse ........ RN side of engine compartment, on inner fender
panel
...................................
Remote Dimmer ................. RH side of steering column. on IIP retainer .....
Starter Solenoid (VIN E) .......... Lower RH side of engine ....................
Starter Solenoid (VIN F) (VIN 8) .... Lower RH side of engine ....................

POWER DISTRIBUTION
COMPONENT LOCATION Page-Figure
Starter Solenoid (VIN
S) .......... Lower RH side of engine ....................
VATS Decoder Module ............ Behind LH side of IIP. above steering column
el00 (42 cavities) ................ LH front of dash. left of brake master cylinder ..
C104 (6 cavities) ................. Front of engine compartment. RH side of
radiator
.................................
Clll(1 cavity) ................... Behind battery. near positive battery cable .....
C115 (1 cavity) ................... Center front of dash ........................
C204 (4 cavities) ................. Above LH rear corner of engine ..............
C207 (15 cavities) ................ Behind RH side of IIP. near ECM .............
C208 (8 cavities) ................. Behind LH side of rear seat ..................
(2218 ........................... Behind center of IIP ........................
C219 (6 cavities) ................. Behind RH side of IIP. near Subwoofer Amplifier
G100 (VIN E) ................... RH front of engine .........................
G100 (VIN F) (VIN 8) ............. Lower LH front of engine ....................
G100 (VIN S) .................... Lower LH front of engine ....................
6103 (Except VIN E) ............. On radiator support. behind LH headlights .....
6200 .......................... Behind IIP. left of steering column ............
S108 ........................... Engine harness. lower RH side of engine .......
S164 ........................... IIPharness. aboveFuseBlock ................
S166 (VIN E) .................... Engine harness. above rear of engine ..........
S166 (VIN F) (VIN 8) ............. Engine harness. above LH rear of engine .......
S166 (VIN S) .................... Engine harness. lower RH side of engine .......
S168 (VIN F) (VIN 8) ............. Engine harness. RH front of dash .............
S168 (VIN S) .................... Engine harness. top rear of engine ............
S200 ........................... IIP harness. behind LH side of IIP ............
S205 ........................... IIP harness. behind instrument cluster .........
S223 ........................... IIP harness. above Fuse Block ................
S224 ........................... IIP harness. near LH shroud
S225
........................... IIP harness. behind instrument cluster .........
S232 ........................... IIP harness. behind LH side of IIP. above Fuse
................................... Block
S236
........................... IIP harness. below light switch ...............

FUSE DATA DETAILS: FUSE DATA
E:ge Connector
(To Junction
Block- LP
Brown Connector
Fog Lights
I
ite Connector
White Connecto
REAR VlEW OF FUSE BLOCK
FRONT VlEW OF
FUSE BLOCK Cavity and Connector Locations
CONVENIENCE CENTER

3 FUSE BLOCK DETAILS: lNST LP FUSE 2
R
LIGHT SWITCH DETAILS
PAGES 12-0 AND 124
r------"""----------------------------------
I I BLOCK I
I I-
I I I I - -
8RN
SWITCH - PAGES 100-4,