Pontiac Fiero 1988 Service Manual page 146

STEERING, SUSPENSION, TIRES AND WHEELS DIAGNOSIS 3-5
Hazard Switch Cannot Be Turned Off Turn Indicator Panel Lights
Inspect
Foreign material between hazard support
cancelling leg and yoke
If no foreign material is found, replace turn signal
switch.
Hazard Switch Will Not Stay On or Difficult To
Turn Off
Inspect
Inspect
• Loose turn signal switch
• Interference with other components
• Foreign material interference
• None of the above, replace turn signal switch
No Turn Signal Lights
Inspect
• Electrical failure in chassis harness
• Inoperative turn signal flasher
• Loose chassis-to-column connector. Disconnect
column-to-chassis connector and connect new
turn signal switch to chassis and operate switch
by hand.
A. If car lights now operate normally, turn
signal switch is inoperative.
B. If car lights do not operate, refer to page
8A-111-0 for electrical diagnosis.
Turn Indicator Lights On, But Not Flashing
Inspect
• Inoperative turn signal flasher
• Loose chassis-to-column connection
• Inoperative turn signal switch
• To determine if turn signal switch is inoperative,
substitute new turn signal switch into circuit and
operate switch by hand. If the car's lights operate
normally, turn signal switch is inoperative.
Front Or Rear Turn Signal Lights Not Flashing
\9
Inspect
• Burned-out or damaged turn signal bulb
• High resistance connection to ground at bulb
socket
• Loose chassis-to-column connector. Disconnect
column-to-chassis connector and connect new
turn signal switch into system and operate switch
by hand.
A. If turn signal lights are now on and flashing,
turn signal switch is inoperative.
B. If car lights do not operate, refer to page
8A-111-0 for electrical diagnosis.
Burned out bulbs or opens, grounds in the wiring
harness from the front turn signal bulb socket to the
indicator lights. Refer to page 8A-110-0 for electrical
diagnosis.
Stop Light Not On When Turn Indicated
V
Inspect
Loose column-to-chassis connection
Disconnect the column-to-chassis connector and
connect the new turn signal switch into the
system and operate the switch by hand.
A. If the brake lights work when the switch is
in the turn position, the turn signal switch
is inoperative.
B. If the brake lights do not work, refer to page
8A-111-0 for electrical diagnosis.
Turn Signal Lights Flash Very Slowly
Inspect
m Loose chassis-to-column connection
• Disconnect the column-to-chassis connector and
connect a new turn signal switch into the system
and operate the switch by hand.
A. If the lights flash at a normal rate, the turn
signal switch is inoperative.
B. If the lights still flash very slowly, refer to
page 8A-111-0 for electrical diagnosis.
Hazard Signal Lights Will Not Flash - Turn
Signal Functions Normally
Inspect
• Blown fuse
• Inoperative hazard warning flasher
• Loose chassis-to-column connection
m Disconnect the column-to-chassis connector and
connect a new turn signal switch into the system,
then press in the hazard warning button and
watch the hazard warning lights.
A. If the lights now work normally, the turn
signal switch is inoperative.
B. If the lights do not flash, check the wiring
harness. Refer to page 8A-111-0 for
electrical diagnosis.
IGNITION SWITCH
Electrical System Will Not Function
Inspect
• Damaged ignition switch
• Ignition switch not adjusted properly
• Loose connector at the ignition switch