Hazard Warning Lamps Inoperative; Front Or Rear Lamps Inoperative - Pontiac TRANS AM 1977 Service Manual

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CHASSIS ELECTRICAL
8-67
Open wiring or defective turn signal
If test bulb lights when connected to both
sides of purple wire connection in steering
column connector, replace defective turn
signal switch. If test bulb does not light
on either side of the connector, repair
open circuit between fuse and connector.
Hazard Warning Lamps lnoperative
CAUSE
CORRECTION
Open fuse (stop-hazard).
Defective flasher (located on fuse panel).
Open wiring or defective turn signal switch.
Switch on turn signals. If lamps operate,
replace stop-hazard fuse if blown. If new
fuse blows, repair short to ground.
(Could possibly be in stop light circuit.)
If stop-hazard fuse is OK, switch on turns signals
If lamps operate, replace defective hazard
flasher on fuse panel.
With 12 volt test bulb, check voltage
at brown wire in turn signal steering column
connector. If test bulb does not light on
either side of connector, repair open circuit
between flasher and connector. If test
bulb lights only on feed side of connector,
clean connector contacts. If test bulb lights
on both sides of connector, replace
defective turn signal switch assembly.
SIDE MARKER LAMPS
One
lam^
Inoperative
CAUSE
CORRECTION
Directional signal bulb out(front lamp).
Turn on directional signal. If signal bulb
does not light, replace bulb. (Bulb
filament provides ground path for marker
lamp bulb through light blue or dark
blue/white wires.)
Side marker bulb out.
Replace burned out bulb.
Loose connection or open wiring.
Check voltage at bulb socket brown wire
terminal with test bulb. If bulb lights,
repair open ground circuit. If bulb does not
light, repair open brown wire circuit.
Front or Rear Lamps Inoperative
CAUSE
CORRECTION
Loose connection or open ground connection.
If associated tail or park lamps do not
operate, secure all connectors in brown
Multiple bulbs out.
wire circuit. If park and taillamps operate,
repair open ground connections.
Replace burned out bulbs.

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Firebird 1977

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