Pontiac Fiero 1988 Service Manual page 1040

T R O U B L E S H O O T I N G HINTS
• Try the following checks before doing the
System Check.
1. If Blower Motor does not operate at all, check
the HTR A/C Fuse.
2. Check ground G201 by operating the Wiper/
Washer.
• 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.
SYSTEM CHECK TABLE
ACTION NORMAL RESULT
With the Ignition
Switch in RUN, set
the Blower Switch to
OFF
Blower Motor does
not operate
Set Blower
Switch to LO
Blower Motor oper-
ates at Low speed
Set Blower
Switch to MED
Blower Motor oper-
ates faster at Me-
dium speed
Set Blower Switch to
HI
Blower Motor oper-
ates at High speed
• Refer to System Diagnosis when a result is
not normal.
COMPONENT LOCATION
Page-Figure
Blower Motor Center of front bulkhead 201-13-A
Blower Resistors. Front compartment, lower RH side of heater-A/C
module 201-13-A
Fuse Block Behind LH side of I/P 201- 6-D
Fusible Link A RH front of engine compartment, at Battery
Junction Block 201- 4-A
High Speed Blower Relay. . . . . . . . . . On RH side of heater-A/C plenum 201-13-A
C100 (34 cavities) LH side of front bulkhead, right of brake master
cylinder 201-13-A
G201 Behind center of I/P 201- 6-C
S106 Heater-A/C harness, center of front bulkhead . . . 201-13-A
S107 Heater-A/C harness, RH side of front bulkhead. . 201-13-A
S206 Main harness, above LH side of steering column. 201- 8-F
S212 Main harness, behind center of d a s h . . . . . . . . . . . 201- 6-C
SYSTEM DIAGNOSIS
• Do the tests listed for your symptom in the
Symptom Table below.
• Tests follow the Symptom Table.
SYMPTOM TABLE
SYMPTOM
FOR OlAONOSiiS
Blower Motor does
not operate at all
C: Blower Motor
Test
Blower Motor does
not operate in HI but
operates in LO and/
or MED
D: High Speed
Blower Relay Test
Blower Motor does
not operate in LO
and/or MED, but op-
erates in HI
A: Blower Switch
Test
(Continued in next column)
(Continued from previous column)
Blower Motor oper-
ates with the Blower
Switch in OFF and
the Ignition Switch
in RUN
Replace the Blower
Switch
Blower Motor oper-
ates in HI with the
Ignition Switch OFF
Replace the High
Speed Blower Relay
(Continued on next page)