FORD 1999 F-550 v.1 - Manual (Page 8)

WARNING LIGHTS AND CHIMES
Low fuel
Illuminates as an early reminder of a
low fuel condition indicated on the
fuel gauge. The light comes on when
there is approximately 1/16th of a
tank indicated on the fuel gauge
(refer to Fuel Gauge in this chapter for more information). The ignition
must be in the ON position for this lamp to illuminate. The lamp will also
illuminate for several seconds after the ignition is turned to the ON
position regardless of the fuel level.
Service engine soon (Federal only)
Your vehicle is equipped with a
computer that monitors the engine’s
emission control system. This
system is commonly known as the
On Board Diagnostics System (OBD
I). This OBD I system protects the
environment by ensuring that your vehicle continues to meet
government emission standards. The OBD I system also assists the
service technician in properly servicing your vehicle.
The Check Engine/Service Engine Soon indicator light illuminates
when the ignition is first turned to the ON position to check the bulb. If
it comes on after the engine is started, one of the engine’s emission
control systems may be malfunctioning. The light may illuminate without
a driveability concern being noted. The vehicle will usually be drivable
and will not require towing.
0
0 0 0 0
0 0 0 0 0
MPH
20
km/h
40
60
80
100
120
140
160
0
10
20
30
40
50 60
70
80
90
100
LOW
FUEL
DOOR
AJAR
BRAKE
FUEL
RESET
LOW
RANGE
4 X 4
!
ABS
+ -
L
E
F
H
RPM 1000 X
0
1
2
3
5
6
4
P R N 2 1 8
C
18
H
D
FUEL FILL
SERVICE
ENGINE
SOON
LOW
FUEL
SERVICE
ENGINE
SOON
Instrumentation
8