1988 PONTIAC FIERO Service Repair Manual

BACK UP LIGHTS
TROlJBLESHQOTlNG HINTS COMPONENT LOCATION Page-Figure
Try the following checks before doing the Back Up Switch ................. On LN side of transmission. ................. 201- 8-F
System Check. Fuse Block. ..................... Behind LH side of IIP, below light switch. ...... 201-10-A
............. ............ 1. Check the TURN BIU Fuse by operating the Gear
Selector Switch In
console, at base of gear selector
201-11-E
.................... Flasher. Flasher Behind IIP, to right of steering column. ........ 201- 9-A
2. If only one Back Up Light does not operate,
check bulb, socket,
and related
3. If the Back Up Lights go on or off in the
mong gear, adjust the Gear Selector (Auto-
matic) or Back Up (Manual) Switch.
el00 (42 cavities) ................ LR front of dash, left of brake master cylinder ..
C208 (8 cavities) ................. Behind LH side of rear seat. .................
6303 .......................... Center of end panel. ........................
S229. .......................... IIP harness, behind LH side of IIP ............
S302. .......................... Rear lights harness, LH side of end panel. ......
S308. .......................... Rear lights harness, behind LH rear lights. ..... - - Go to System Check for a guide to normal S3 11. .......................... Rear lights harness, left of RN back up lights
201-17-A ...
operation.
Go to System Diagnosis for diagnostic tests.
SYSTEM DlAGRlOSlS A: BACK UP LlGHTS DO NOT OPERATE
SYSTEM CHECK
Diagnostic steps for the symptoms listed in
Use the System Check Table as a guide to
the following table are listed
aMer the table. WlTCH (Automatic) or
normal operation. BACK
UP SWITCH
(Manual)
Refer to System Diagnosis for
a list of symp-
toms and diagnostic steps.
SYSTEM CHECK TABLE
the Ignition
Switch to RUN, and
move the Gear Shift
to
any gear except
REVERSE
Move the Gear Shift Back Up Lights come
to REVERSE 1 on - -
Move the Gear Shift Back
Up Lights go off
to any gear except
REVERSE
Refer to System Diagnosis when a result is
SYMPTOM TABLE
A: Back Up Lights do not operate
B: Back Up Lights light in PARK or NEU-
TRAL
(Continued on facing page)
not normal. Between
I Voltage I Diagnosis
I DKBLU& I Battery I See l I Ground

BACK UP LIGHTS
1. Check DK BLU (75) wire and the TURN
B: BACK UP LlGHTS LIGHT IN PARK OR
NEUTRAL
Remove the connector from the Gear Selec-
tor Switch (Automatic) or Back Up Switch
(Manual).
If the Back Up Lights go out, adjustlreplace
the Gear Selector Switch or Back Up Switch
as necessary.
If the Back Up Lights do not go out, check
LT GRN
(24) wires and sockets for a short to
battery voltage.
CIRCUIT OPERATION
With the Ignition Switch in RUN, BULB
TEST or START, voltage is applied through
the TURN
BIU Fuse to the Gear Selector
Switch (with Automatic Transmission), or to
the Back Up Switch (with Manual Transmis-
sion). Whenever the gear selector lever is
s&&ed to REVERSE, the Gear Selector Switch
or the Back Up Switch closes, and voltage is
applied to the Back Up Lights.

-. INTERIOR LIGHTS: DOME/READING/COURTESY/GLOVE BOX AND CIGAR LlGHTER 00 b
I ..a
.8 ORN
- - -

INTERIOR LIGHTS: CARGO COMPARTMENT LIGHT
COMPARTMENT
.8 WHT 156

TROUBLESHOOTING HINTS
* Try the following checks.
Check
GTSY Fuse if none of the Interior Lights
operate.
DomeIReadinglCourtesy Lights
1. If the PanelIInterior Light Control does not op-
erate the Interior lights but the lights turn on
with any door open, check the Light Switch,
WBT (156) and BLK (150) wires for continuity
(see schematic).
2. If the Interior Lights do not come on with
only one door open, check the
WNT (156)
wire and suspect Door Jamb Switch for con-
tinuity.
Repairlreplace as necessary.
3. If the Dome Light comes on but the Reading
Light(s) do not, repairlreplace the Reading
Light(s) as necessary.
4. If the Dome and Reading Lights do not light
but the
RN and LII Courtesy Lights do,
check connection at
C206 and related wiring
(see schematic).
5. If the Dome Lights do not light when the
Panel Interior Light Control is turned to ON
but do light with any door open, check con-
nection at 6206
and related wiring for con-
tinuity (see schematic).
6. If the RN and LN Courtesy Lights do not
light with any door open but do light when
the Panel Interior Light Control is turned
ON, check related wiring for continuity (see
schematic).
7. If only one light does not operate, check bulb,
socket and related wiring (see schematic).
COMPONENT LOCATION Page-Figure
..................... Fuse Block. Behind
LN side of IIP, below light switch. ...... 201-10-A
................. C206 (2 cavities) Behd IIP, at LH shroud
................ C238 (12 cavities) LH shroud, ahead of center access hole. ........ 201-11-C
.......................... ............ 6200 Behind IIP, left of steering column 201-10-A
.......................... ................. 6302 Center of windshield header. 201-15-E
.......................... 63 19 In cargo compartment, behind center of end
................................... panel 201-17-D
.......................... S203. IIP harness, behind instrument cluster. ........ 201-10-A
.......................... S205. IIP harness, behind instrument cluster. ........ 201-10-A
.......................... ............ S237. I/P harness, behind LH side of IIP 201-10-A
8. If the Courtesy Lights do not turn off, check
the Panel Interior Light Control, Door Jamb
Switches and
WBT (156) wires for a short to
ground.
Glove Box Light GonsoleICigar Lighter
1. If the Glove Box Light does not light but the
Cigar Lighter works, check the connector,
ORN (40) wire,
BLK (150) wires, and switch
for continuity. 2. If
only the Cigar Lighter does not operate,
check the element for corrosion or damage.
Also check the ORN (40) and BLK (150) wires
to their connector and connector for continuity.
Replace the Cigar Lighter
Assembly if the ele-
ment, the wires, and connector are good.
Cargo Compartment EIgM
If only the Cargo Coqartment Light does
not operate, check the Cargo
Coqartment
Light Switch, connector 6238, ORN (40) wire,
WHT (156) wire and BLK (150) wires for con-
tinuity (see schematic).
Repairlreplace as neces-
sary-

INTERIOR LIGHTS
interior Lights and Cigar Lighter
Voltage is applied at all times through the
CTSY Fuse to the coqonents in the circuit.
The Glove Box Light, Dome Reading Lights,
and Cigar Lighter each use separate switches.
The
LH and RH Courtesy Lights and the Dome
Light can be turned on by closing the Panel
Interior Light Control, or by opening a door.
Cargo Compartment Light
Voltage is applied to the CTSY Fuse at all
times. With the Cargo Compartment Light
Switch closed, voltage is applied to the Cargo
Compartment Light.

RADIO WITH UK3