Ford 2013 F-650 Owner's Manual page 72

High Beam
It illuminates when the headlamp high beam is switched on.
Low Fuel Level (gasoline engine only)
It illuminates when the fuel level is low or near empty. Refuel
as soon as possible.
Parking Brake Warning
It momentarily illuminates when the ignition is switched to the
P
on position (with the engine off). It also illuminates when the
parking brake is engaged. If the parking brake warning lamp
does not illuminate at these times, seek service immediately.
Vehicles equipped with the Power Park Parking Brake option: If
the park brake warning lamp begins to blink after setting the parking
brake on your vehicle, this may indicate a failure in the parking brake
system. Seek service from your dealer immediately.
Powertrain Malfunction/Reduced Power/Electronic Throttle
Control (gasoline engine only)
It illuminates when a powertrain fault has been detected.
Contact your authorized dealer as soon as possible.
Service Engine Soon
It illuminates when the ignition is first switched to the on
position to check the bulb and to indicate whether the vehicle
is ready for Inspection/Maintenance (I/M) testing.
Solid illumination after the engine is started indicates the on-board
diagnostics system (OBD-II) has detected a malfunction.
WARNING: Under engine misfire conditions, excessive exhaust
temperatures could damage the catalytic converter, the fuel
system, interior floor coverings or other vehicle components, possibly
causing a fire.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Instrument Cluster 71