Pontiac Fiero 1988 Service Manual page 1102

HEADLIGHTS
T R O U B L E S H O O T I N G HINTS
• Try the following checks before doing the Sys-
tem Diagnosis.
1. If the Headlights on one side are on dimly,
check the ground on that side.
2. If Hi Beams do not light, but the Hi Beam
Indicator lights, check the LT GRN (11) wire
for an open (see schematic).
3. If one Headlight doesn't work, check the
Headlight, connections, and wires to the
Headlight.
4. If the Headlights do not turn off, replace the
Light Switch.
• Go to System Diagnosis for diagnostic tests.
S Y S T E M D I A G N O S I S
• Diagnostic steps for the symptoms listed in
the following table are listed after the table.
S Y M P T O M T A B L E
A. All Headlights are inoperative or inter-
mittent
B. Lo Beams on both sides are inoperative
or Hi Beams and Hi Beam Indicator are
inoperative.
C O M P O N E N T L O C A T I O N "
Page-Figure
Fusible Link B RH front of engine compartment, at Battery
Junction Block 201- 4-A
Headlight Dimmer Switch Lower LH side of steering column 201- 8-B
C100 (34 cavities) LH side of front bulkhead, right of brake master
cylinder 201-13-A
G101 On LH fender, below headlamp 201-11-C
G102 On RH fender, below headlamp. 201-11-C
G201 Behind center of I/P 201- 6-C
S103 Forward lamp harness, near bulkhead connector. 201-10-C
S202 Main harness, behind I/P 201- 7-A
S212 Main harness, behind center of dash 201- 6-C
A: A L L H E A D L I G H T S A R E
I N O P E R A T I V E OR I N T E R M I T T E N T
( T A B L E 1)
Connect: T E S T LAMP
At: LIGHT SWITCH CONNECTOR
(Connected)
Condition:
• Light Switch: HEAD
Connect
Between
Correct Result For Diagnosis
C (RED) &
Ground
Test Lamp
lights
Seel
D (YEL) &
Ground
Test Lamp
lights
Go to Table 2
• If both results are correct, go to Test B.
1. Check Fusible Link B and RED (2) wire
for an open (see Power Distribution).
A: ALL HEADLIGHTS ARE
INOPERATIVE OR INTERMITTENT
(TABLE 2)
Connect:
FUSED JUMPER
At:
LIGHT
SWITCH CONNECTOR
(Disconnected)
Conditions:
© Put a 15 amp fuse in the fused jumper
• Dimmer Switch: LO
Connect
Between
Correct
Indication
For Diagnosis
C(RED)&D
(YEL)
Headlights
light
Seel
© Dimmer Switch: HI
C(RED)&D
(YEL)
Hi Beams
Light
See 1
© If results are correct, replace the Light
Switch.
1. Check for short to ground in wiring to
Headlights.
(Continued on next page)