Pontiac FIREBIRD 1972 Service Manual page 40

HEATING AND VENTILATION 1-19
HEATER BLOWER MOTOR RESISTOR
REMOVE AND REPLACE
-
ALL
1. Remove glove compartment and door (on F and X
Series only).
2. Remove resistor wire connector (B Series
-
on air
inlet assembly underhood, except B Series
-
on top of
heater case).
3. Remove resistor (2 screws).
4. Replace by reversing removal procedure.
5. Check operation.
i
HEATER WIRE HARNESS
The X Series heater and defroster system does not utilize
a separate heater wire harness. For servicing electrical
wiring refer to Section 12 of this manual.
REMOVE AND REPLACE
-
EXCEPT X SERIES
1. Disconnect battery.
2. Disconnect wire connector at blower motor (and con-
nector at blower resistor on B Series), remove dash
grommet and feed wire harness through dash open-
ing into passenger compartment.
For installation drawing, see Fig. 1-16 (B Series), Fig.
1
-
17 (G Series), Fig. 1
-
18 (A Series) and Fig. 1
-
19 (F
Series).
3. Remove lower instrument panel trim at steering col-
umn (B and F Series only).
4. Remove upper instrument panel trim plate at cluster
(B and F Series only).
5. Disconnect blower switch and power feed connectors
at control panel. On B Series it will be necessary to
disconnect the heater control cables, remove 3 screws
and position control panel out from I.P. opening to
disconnect connectors.
--
-
DASH GROMMET
BLOWER MOTOR
/ :
RESISTOR
. :
- .
- . , I + .
x
BLOWER SWITCH
HEATER POWER FEED
8 LAMP SOCKET
OF INSTRUMENT PANEL
WIRE HARNESS VIEW "A"
- -
Fig. 1-18 A Series Heater Wire Harness Routing