FORD 2013 F-550 v.3 - Manual (Page 100)

WARNING LAMPS AND INDICATORS
The following warning lamps and indicators will alert you to a vehicle
condition that may become serious. Some lamps will illuminate when you
start your vehicle to make sure they work. If any lamps remain on after
starting your vehicle, refer to the respective system warning lamp for
further information.
Note: Some warning indicators appear in the information display and
function the same as a warning lamp but do not display when you start
your vehicle.
Airbag – Front
If it fails to illuminate on startup, continues to flash or remains
on, it indicates a malfunction. Have the system checked by
your authorized dealer. A chime will sound when there is a
malfunction in the indicator light.
Anti-Lock Braking System
If it illuminates when you are driving, this indicates a
malfunction. You will continue to have the normal braking
system (without ABS) unless the brake warning lamp is also
illuminated. Have the system checked by your authorized dealer.
Battery
If it illuminates while driving, it indicates a malfunction. Switch
off all unnecessary electrical equipment and have the system
checked by your authorized dealer
Brake System
It will illuminate when the parking brake is engaged and the
ignition is on.
If it illuminates when you are driving, check that the parking brake is not
engaged. If the parking brake is not engaged, this indicates low brake
fluid level or a brake system malfunction. Have the system checked
immediately by your authorized dealer.
WARNING: Driving a vehicle with the brake system warning
light on is dangerous. A significant decrease in braking
performance may occur. It will take you longer to stop the vehicle.
Have the vehicle checked by your authorized dealer as soon as possible.
Driving extended distances with the parking brake engaged can cause
brake failure and the risk of personal injury.
Instrument Cluster 99
2013 F-250/350/450/550 (f23)
Owners Guide gf, 3rd Printing, December 2012
USA (fus)