Common Warning and Indicator Lamps
Parking/Emergency Brake
Indicates the parking brake is engaged.
Cruise Control
Indicates the cruise control is enabled.
Unfastened Seat Belt
Activates with an audible alert when the system detects that
the parking brake is off and the driver seat belt is not
fastened on some vehicles. On other vehicles, this lamp
illuminates for 15 seconds when the ignition is first turned
on.
Table 3.3, Common Warning and Indicator Lamps
Standard Instruments
Standard instruments are present on every vehicle.
They are listed here in alphabetical order, to make
the information easier to find.
Air Pressure Gauges
WARNING
If air pressure falls below minimum pressure, the
braking ability of the vehicle will be limited. Slow
the vehicle down and bring it to a gradual stop.
Do not attempt to move the vehicle until air pres-
sure has risen above the minimum level. Moving
a vehicle without adequate braking power could
cause an accident resulting in personal injury or
death.
Air pressure gauges, as shown in
Fig. 3.10
, register
the pressure in the primary and secondary air sys-
tems. The gauges are labeled for the A or B reser-
voir. Normal pressure with the engine running is 100
to 120 psi (689 to 827 kPa) in both systems.
A low-air-pressure warning light and audible warning,
connected to both the primary and secondary sys-
tems, activate when air pressure in either system
drops below 64 to 76 psi (441 to 524 kPa).
ABS
ABS
BRAKE
CHECK
STOP
OPT 9
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*WAIT*
TO START
CHECK
TRANS
BRAKE
AIR
LOW
WATER
WHEEL
SPIN
AIR
FILTER
WASH
FLUID
OPT 8
Fig. 3.9, EPA10 Dash Message Center
Instruments
3.9