Alternator Warning Light - Porsche 928 1980 Owner's Manual

Oil pressure gauge
Oil pressure warning light
Engine oil pressure is shown in bar. At 5000
rpm, with the engine at normal operating
temperature, the oil pressure should be
about 5 bar. A slight drop in oil pressure at
higher temperatures is normal.
If the oil pressure should drop suddenly
while you are driving, this light and the cen-
tral warning light will flash. Pull off the road
and stop the engine immediately. Check
the engine oil level. If it appears to be normal,
contact the nearest workshop.
24
Voltmeter

Alternator warning light

The voltmeter shows the overall condition of
the charging system. The needle should nor-
mally stay in the 12-14 volt range when the
engine is running. A temporary drop below
12 volts when starting the engine is normal.
The alternator warning light comes on when
the ignition is turned on and goes out as the
engine rpm increases. If the light does not
light up when turning the ignition on, or if it
does not go out after starting the engine,
there may be a malfunction in the electrical
system. If this is the case, contact your
Porsche dealer. If the light flickers or stays on
while you are driving, the V-belt may be loose
or broken. The belt should be retensioned or
replaced. The fault may also be in the regu-
lator or the alternator itself. In this case, keep
electrical consumption at a minimum and
drive to the nearest workshop.
The central warning light and the warning
lights in the combination instrument light up
for a bulb check when the ignition is turned
on. They should go out as soon as the engine
is started. Also see "Central warning light
system".
OXS (oxygen sensor) light
The OXS light functions as a "Service
Reminder". The light will come on (and stay
on) every 30,000 miles or 48,000 km to re-
mind you to take your car to your Porsche
dealer for the scheduled emission control
maintenance service.
The OXS lamp lights up when the ignition is
turned on and should go out after the engine
has been started. If the light does not go
out after the engine has started, a malfunc-
tion may have occurred in the monitoring
system. Have your dealer locate and correct
the cause promptly (see "Emission Control
System" for more details).
BRAKE FLUID warning light flashes when
the brake fluid level falls below the required
minimum.
BRAKE PAD warning light comes on when
a brake pad is worn.
BRAKE PRESS warning light flashes if one
of the circuits in the brake system should fail.
PARK BRAKE warning light comes on and
stays on until parking brake is fully releas-
ed.
ENGINE OIL warning light flashes if, with
the ignition on, the engine stationary, and
the vehicle in level position, the amount of
oil in the sump is less than 1.59 U.S. gal. or
6 liters. Do not attempt to start the engine!
Add oil at once.