Radio Diagnosis - Pontiac TRANS AM 1977 Service Manual

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.-
.
*
ACCESSORIES
9.29
TURN ON lGNiTlON
NOISY
+
f % A q
USE PROCEDURE 7
See Fig.
9-35
WHINE OR WHlRRlNG SIREN-
LIKE SOUND
-
VARIES IN
PITCH WlTH ENGINE SPEED
CHANGE AND DISAPPEARS
WHEN ALTERNATOR IS
UNPLUGGED
USE PAOCEDURE5
POPPING SOUND WHEN
AN ELECTRIC& DEVICE
IS DIRECTLY OR
INDIRECTLY ACTIVATED
SWITCH POPS
-
FAINT SWISH SOUND A 5
. . .
BLOWER MOTOR NOISE
-
USE PROCEDURE 6
TAPE ONLY WEAK
9
FM ONLY WEAK
ANOTHER C+W WlTH AN FM
R I D 0 TUNE ( N
A
WEAK
AADIO WORXS
I
,
1
STILL WEAK
1
% i T
,
&
yGi L y 1
g e T
CHECK ANTENNA AN0 LEAD IN
WITH A SUBSTITUTE ANTENNA
RECEPTION
TRIM ISEE PAOCEDVRE NO
I
I
STILL WEAK
RADIO WORKS
A
EXPLAIN TO
THAT RADIO
IS NORMAL
DETERMINE IF ALL
ARE WEAK
ALL SPE,AKERS
I
NOT ALL T E A S
REPLACE MAL
WNCTlONlNG
SUBSTITUTE
WITH KNOWN
Note: Procedures listed are
in Figures 9-36 and 9-37.
Fig. 9-34 Radio Diagnosis

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Firebird 1977

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