Pontiac Fiero 1988 Service Manual page 1120

BACK UP
LIGHT!
•
TROUBLESHOOTING HINTS
© Try the following checks before doing the
System Check.
1. Check the TURN B/U Fuse by operating the
Turn Lights.
2. Check that ground G202 is clean and tight.
3. If only one Back Up Light does not operate,
check the bulb, socket and related wiring.
• Go to System Check for a guide to normal
operation.
• Go to System Diagnosis for diagnostic tests.
SYSTEM CHECK
< Use the System Check Table as a guide to
normal operation.
• Refer to System Diagnosis for a list of symp-
toms and diagnostic steps.
S Y S T E M CHECK TABLE
COMPONENT LOCATION
ACTION NORMAL RESULT
Turn the Ignition
Switch to RUN, and
move the Gear Shift
to PARK or
NEUTRAL
Back
Up Lights are
off
Move the Gear Shift
to REVERSE
RHandLHBackUp
Lights come on
Move the Gear Shift
to NEUTRAL
Back Up Lights go
off
• Refer to System Diagnosis when a result is
not normal.
SYSTEM DIAGNOSIS
o
Diagnostic
steps for the symptoms listed in
the following table are listed after the table.
Page-Figure
Top rear of transaxle 201- 2-B
Back Up Light Switch
Fuse Block Behind LH side of I/P 201- 6-D
Transaxle Position Switch LH rear of engine, top of transaxle 201- 2-B
C401 (2 cavities) Taped to rear lights harness, to right of license
plate lamps 201-14-A
C500 (34 cavities) Engine compartment, near battery 201- 4-A
G202 Between seats, near rear bulkhead 201- 6-A
S213 Main harness, behind rear bulkhead grommet... 201-15-A
S401 Rear lights harness, LH side of back panel 201-14-A
S403 Rear lights harness, RH side of back panel 201-14-A
S407 Rear lights harness, behind RH stop lights 201-14-A
SYMPTOM TABLE
A. Back Up Lights do not operate
B. Back Up Lights stay on
A. BACK UP LIGHTS DO NOT OPERATE
Measure: VOLTAGE
At: CONNECTOR C500 (Connected)
Conditions:
• Ignition Switch: RUN
• Gear
Shift:
REVERSE
Measure
Between
Correct
Voltage
For
Diagnosis
CI (DK BLU)
& Ground
Battery
Seel
F9 (LT GRN)
& Ground
Battery See
2
(Continued in next column)
(Continued from previous column)
If voltages are correct, check the bulbs,
sockets, LT GRN (24) and BLK (150) wires
and related connectors (see schematic).
Check the DK BLU (75) wire and the
TURN B/U Fuse.
Adjust or replace the Gear Selector Switch
(for automatic) or Back Up Lights Switch
(for manual) as necessary.
(Continued on next page)