Pontiac FIREBIRD 1972 Service Manual page 1428

ACCESSORIES 15-13
The electric clock provides automatic regulation of the
rate when the position of the hands is changed manually.
Moving the hands forward or backward adjusts the length
of the hair spring to make the clock run faster or slower.
The amount of change in rate depends upon the amount
the hands are changed. Maximum rate change is approxi-
mately 20 seconds per day and is obtained when the hands
are moved five minutes. If the clock is reset less than five
minutes the change in rate is proportionally less than 20
seconds.
SETTING CLOCK
When setting clock to correct for errors in time, pull reset
stem out, move hands counterclockwise to correct time if
clock is running fast, or move hands clockwise to correct
time if clock is running slow, then allow reset stem to
return to its normal position. This will automatically ad-
just the rate of clock.
Owners should be advised to set the clock to the correct
time once a week at regular intervals to insure maximum
accuracy.
RALLY GAGES
The rally gage option consits of an engine water tempera-
ture gage, an oil pressure gage, and a voltmeter (B and F
Series only).
These gages are incorporated into the instrument cluster
and replace the standard warning lamps. The water tem-
perature and oil pressure gages are electrically operated
from sending units mounted in the cylinder head and oil
filter base respectively. The voltmeter registers regulated
voltage which provides an indication of the charging sys-
tems ability to keep the battery charged. Continuous read-
ings in either the high or low voltage red bands can
indicate improper voltage regulation, broken or slipping
alternator belt, shorted alternator diode or defective bat-
tery. Readings in the yellow band are normal with the
engine idling or for short periods after long engine crank-
ing. However, continuous readings in the yellow can indi-
cate faulty operation.
TACHOMETER
The tachometer indicates speed of the engine in revolu-
tions per minute. The engine can safely be operated up to
a maximum RPM as indicated by the start of the red bar.
Engine operation causing tachometer readings in the red
area can lead to serious engine damage.
The tachometer is available as a dash mounted unit on A
and F Series. This dash unit is mounted in the I P clock
location. On F Series, a combination tachometer-clock
unit is the only tachometer available.
ELECTRIC DECK LID RELEASE
With this option, the deck lid latch can be operated from
a switch located in the glove box. This switch operates a
solenoid which opens the deck lid.
The truck can also be operated in the normal manner
using a key.
ELECTRIC REAR W I N D O W DEFOGGER
The electric rear window defogger option, available on all
series, consists of grid lines bonded on the inner surface of
the rear window. The grid lines complete a circuit and
develop high current as voltage is applied to the resistance
of the grids.
The power developed raises the temperature of the glass
to a point sufficient to defog the window.
NOTE: The rear window temperature is not
raised to a level that would cause thegrid lines
to be wann to the touch. Do not touch thegrid
fines to detennine proper operation.
The electric rear window defogger switch (ON-OFF) fea-
tures an indicator lamp which glows when the defogger is
in operation.
BLOWER REAR W I N D O W DEFOGGER
The rear window defogger mounted under the rear pack-
age shelf provides rapid defogging of the rear window. The
blower control switch, located on the instrument panel,
may be operated on either "HI" or "LO" speed as re-
quired. Lo speed is provided by means of a resistor
mounted on the control switch.
WARNING LAMP OPTION
A warning lamp option cousists of two (2) indicator lamps
in the cluster assembly. The lamps serve as a warning for
the following:
LOW FUEL
-
Refuel before too long. This lamp glows
when fuel level drops to approximately one-eighth of full
tank and will remain glowing until fuel level is increased.
WASHER
-
Add windshield washer solution. This lamp
glows whenever washer solution level drops to one-third
full.
CONSOLE
A seat separator console is available on all models with
bucket seats and floorshift transmission.
The console includes a shift lever opening (with indicator
on automatic transmission models) and compartment box
(except X Series).
On F Series a rear seat console is available with or without
front console. This console includes an ashtray and seat
belt buckle compartment.
AM, A M - F M RADIO
The pushbutton radio provides manual tuning, pushbut-
ton tuning, and a tone control which enables the owner to