Page 17 of 407

Engine oil pressure:Illuminates
when the oil pressure falls below the
normal range. Refer toEngine oil
in theMaintenance and
Specificationschapter.
Low tire pressure warning (if
equipped):Illuminates when your
tire pressure is low. If the light
remains on at start up or while
driving, the tire pressure should be
checked. Refer toInflating your tiresin theTires, Wheels and
Loadingchapter. When the ignition is first turned to on, the light will
illuminate for three seconds to ensure the bulb is working. If the light
does not turn on, have the system inspected by your authorized dealer.
For more information on this system, refer toUnderstanding your tire
pressure monitoring system (TPMS)in theTires, Wheels and
Loadingchapter.
Charging system:Illuminates when
the battery is not charging properly.
If it stays on while the engine is
running, there may be a malfunction
with the charging system. Contact your authorized dealer as soon as
possible. This indicates a problem with the electrical system or a related
component.
Powertrain malfunction/Reduced
power/Electronic throttle
control (RTT):Displays when the
engine has defaulted to a
“limp-home” operation or when a transmission problem has been
detected and shifting may be restricted. If the light remains on, have the
system serviced immediately by your authorized dealer.
Traction control (RTT) (if
equipped):Displays when the
traction control system is active. If
the light remains on, have the
system serviced immediately by
your authorized dealer. Refer toTraction controlin theDrivingchapter
for more information
Instrument Cluster
17
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 18 of 407

Check fuel cap (RTT):Displays
when the fuel cap may not be
properly installed. Continued driving
with this light on may cause the
Service engine soon warning light to
come on. Refer toFuel filler capin
theMaintenance and Specificationschapter.
Engine coolant temperature
(RTT):Displays when the engine
coolant temperature is high. Stop
the vehicle as soon as safely possible, switch off the engine and let it
cool. Refer toEngine coolantin theMaintenance and Specifications
chapter.
WARNING:Never remove the coolant reservoir cap while the
engine is running or hot.
Low fuel (RTT):Displays when
the fuel level in the fuel tank is at
or near empty (refer toFuel gauge
in this chapter).
Door ajar (RTT):Displays when
the ignition is in the on position and
any door is open.
Transmission Tow/Haul Feature
(automatic transmission) (if
equipped):The Tow Haul light
remains illuminated as long as the
Tow/Haul feature is activated. Refer to theDrivingchapter for
transmission function and operation. If the light remains illuminated and
will not cancel using the Tow/Haul switch located on the end of the gear
shift lever, have the system serviced immediately or damage to the
transmission could occur.
Instrument Cluster
18
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 19 of 407

Four wheel drive low (if
equipped):Illuminates when
four-wheel drive low is engaged.
Four wheel drive high (if
equipped):Illuminates when
four-wheel drive high is engaged.
Anti-theft system:Flashes when
the SecuriLockPassive Anti-theft
System has been activated.
Speed control (if equipped):
Illuminates when the speed control
is activated. Turns off when the
speed control system is deactivated.
Turn signal:Illuminates when the
left or right turn signal or the
hazard lights are turned on. If the
indicators stay on or flash faster, check for a burned out bulb.
High beams:Illuminates when the
high beam headlamps are turned on.
If your vehicle is equipped with a diesel engine, it has some unique
warning lights; refer toInstrument Clusterin yourPower Stroke 6.0
and 6.4 Liter Direct Injection Turbo Diesel Owner’s Guide
Supplementfor detailed information on their function.
Diesel warning lights:
•Glow plug pre-heat
•Waterinfuel
•Low oil pressure4x4
LOW
4x4
HIGH
Instrument Cluster
19
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 20 of 407

Key-in-ignition warning chime:Sounds when the key is left in the
ignition in the off or accessory position and the driver’s door is opened.
Headlamps on warning chime:Sounds when the headlamps or parking
lamps are on, the ignition is off (the key is not in the ignition) and the
driver’s door is opened.
Parking brake on warning chime:Sounds when the parking brake is
set, the engine is running and the vehicle is driven more than 3 mph
(5 km). If the warning remains on after the parking brake is off, contact
your authorized dealer as soon as possible.
Turn signal chime:Sounds when the turn signal lever has been
activated to signal a turn and not turned off after the vehicle is driven
more than 2 miles (3.2 km).
Message center activation chime:Sounds when some warning
messages appears in the message center display for the first time.
Overspeed chime (if equipped):Sounds when the vehicle speed
reaches 75 mph (120 km/h) or higher.
Airbag secondary warning chime:Sounds to inform the driver, in the
event that the airbag readiness warning lamp is inoperable, that there is
a fault in the supplemental restraint system.
Instrument Cluster
20
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 21 of 407
GAUGES
Speedometer:Indicates the current vehicle speed.
Standard instrument cluster
Harley-Davidson instrument
cluster
Instrument Cluster
21
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 22 of 407

Engine coolant temperature
gauge:Indicates engine coolant
temperature. At normal operating
temperature, the needle will be in
the normal range (between “H” and
“C”).If it enters the red section,
the engine is overheating. Stop
the vehicle as soon as safely
possible, switch off the engine and let the engine cool.
WARNING:Never remove the coolant reservoir cap while the
engine is running or hot.
Odometer:Registers the total miles
(kilometers) of the vehicle. Refer to
Standard message centeror
Optional message centerin this
chapter on how to switch the
display from Metric to English.
Trip odometer:Registers the miles (kilometers) of individual journeys.
•With standard message center:
Press the SELECT/RESET stem
once to switch from the odometer to
the trip odometer. Press the stem
again to select Trip A and Trip B
features. To reset the trip, press and
hold the stem until it resets.
•With optional message center:
SeeTRIP A/BunderOptional message centerin this chapter.
Instrument Cluster
22
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 23 of 407
Tachometer:Indicates the engine speed in revolutions per minute.
Driving with your tachometer pointer continuously at the top of the scale
may damage the engine.
Standard instrument cluster
Harley-Davidson instrument
cluster
Engine oil pressure gauge:
Indicates engine oil pressure. The
needle should stay in the normal
operating range (between “L” and
“H”). If the needle falls below the
normal range, stop the vehicle, turn
off the engine and check the engine
oil level. Add oil if needed. If the oil
level is correct, have your vehicle checked at your authorized dealer.
Instrument Cluster
23
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)
Page 24 of 407

Fuel gauge:Indicates
approximately how much fuel is left
in the fuel tank (when the ignition
is in the on position). The fuel
gauge may vary slightly when the
vehicle is in motion or on a grade.
The FUEL icon and arrow indicates
which side of the vehicle the fuel
filler door is located.
Refer toFilling the tankin theMaintenance and Specifications
chapter for more information.
Battery voltage gauge (manual
transmission only):Indicates the
battery voltage when the ignition is
in the on position. If the pointer
moves and stays outside the normal
operating range, have the vehicle’s
electrical system checked as soon as
possible.
Transmission fluid temperature gauge (automatic transmission
only):If the gauge is in the:
Normal area–the transmission
fluid is within the normal operating
temperature (between “H” and “C”).
Yellow area–the transmission fluid
is higher than normal operating
temperature. This can be caused by
special operating conditions (i.e.
snowplowing, towing or off road
use). Refer toSpecial operating
conditionsin thescheduled
maintenance informationfor
instructions. Operating the transmission for extended periods of time
with the gauge in the yellow area may cause internal transmission
damage.
Instrument Cluster
24
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)