FORD 2002 F-550 v.1 - Manual (Page 13)

Check air suspension (if equipped)
Illuminates momentarily when the
ignition is turned to the ON position
and the engine is OFF. The light
also illuminates when the air
suspension switch is turned OFF or the air suspension system requires
servicing.
For information, refer to Air suspension system in the Driving chapter.
Low fuel
Illuminates when the fuel level in
the fuel tank is at, or near, empty
(refer to Fuel gauge in this chapter
for more information).
Speed control
Illuminates when the speed control
is activated.
Transmission control indicator light (TCIL)
Illuminates when the overdrive
function of the transmission has
been turned OFF using the
Transmission Control Switch (TCS).
Refer to the Driving chapter for
transmission function and operation.
If the light does not come on or if the light flashes steadily, have your
vehicle serviced as soon as possible, damage to the transmission could
occur.
CHECK
SUSP
OVERDRIVE
Instrument cluster
13