Pontiac Fiero 1988 Service Manual page 1268

MISCELLANEOUS ACCESSORIES
9F-1
SECTION 9F
MISCELLANEOUS A C C E S S O R I E S
CONTENTS
General Description
9F-1
Rally Gages
9F-1
Tachometer 9F-1
Trip Odometer 9F-1
Electric Rear Window Defogger 9F-1
Power Remote Control Rearview
Mirror 9F-2
Diagnosis
9F-2
Rally Gages/Tachometer 9F-2
Electric Rear Window Defogger 9F-2
Power Remote Control Outside
Mirror 9F-2
Dash and Console Mounted
Accessory Switches 9F-2
G E N E R A L D E S C R I P T I O N
1 — S E R V I C E E N G I N E SOON
2 — B R A K E W A R N I N G LIGHT
3 — C H O K E W A R N I N G LIGHT
4 — V O L T M E T E R
5 — C O O L A N T T E M P . G A G E
6 — F U E L G A G E
7 — S E A T B E L T LIGHT
8 — O I L P R E S S U R E G A G E
c
Fig. 1 Rally Gages - Typical
RALLY GAGES
Figure 1
The Rally Gage option, available on most models,
consists of an engine water temperature gage, an oil
pressure gage, a voltmeter,and, in some applications, a
tachometer.
These gages are incorporated into the instrument
cluster and replace the standard warning lamps. The
water temperature and oil pressure gages are
electrically operated from sending units mounted on
the engine. See Section 8C On-Car Service for specific
locations. The voltmeter registers regulated voltage,
providing an indication of the charging system's ability
to keep the battery charged. Continuous readings in
either the high or low voltage bands can indicate
improper voltage regulation, broken or slipping
alternator belt, a shorted alternator diode or a defective
battery. Readings in the low band are normal with the
engine idling or for short periods after long engine
cranking. However, continuous readings in the low
band can indicate faulty operation.
TACHOMETER
Figure 2
The tachometer indicates speed of the engine in
revolutions per minute (RPM). The engine can safely
be operated up to a maximum RPM as indicated by the
start of the red bar. Engine operation with tachometer
readings in the red area can lead to serious engine
damage.
Due to its dual-coil design, the tachometer may
not return to zero when the ignition is turned off. This
is a normal condition and should not be diagnosed as
a problem in the tachometer.
TRIP ODOMETER
The trip odometer on clusters without an
electronic digital odometer can be reset by
t w i c e
fully
depressing the reset pushbutton. The first depression
shows all zeroes, and the second locks them in position.
Both depressions must be done to avoid possible half
cycling of the trip odometer. A slow, steady push
should be used to avoid damage to the internal
mechanism. On clusters with an electronic digital
odometer simply press the Reset button.
ELECTRIC REAR WINDOW DEFOGGER
The electric rear window defogger system
incorporates an electrical grid fused to the inside
surface of the rear glass. Current is applied to this grid
through a control switch on the instrument panel to
warm and defog the glass. A defogger timer, which is
also activated when the system is on, allows current
flow through the rear window grid for approximately
10 minutes on first application (approximately 5
minutes on subsequent applications) and automatically
shuts off the system. The system can be turned off at