Ford F-150 Heritage (2004 year). Manual — part 2

WARNING LIGHTS AND CHIMES

Standard instrument cluster

Optional instrument cluster

Warning lights and gauges can alert you to a vehicle condition that may
become serious enough to cause expensive repairs. A warning light may
illuminate when a problem exists with one of your vehicle’s functions.
Many lights will illuminate when you start your vehicle to make sure the
bulb works. If any light remains on after starting the vehicle, have the
respective system inspected immediately.

Service engine soon: The Service
engine soon indicator light
illuminates when the ignition is first
turned to the ON position to check
the bulb. Solid illumination after the engine is started indicates the On
Board Diagnostics System (OBD-II) has detected a malfunction. Refer to
On board diagnostics (OBD-II) in the Maintenance and Specifications
chapter. If the light is blinking, engine misfire is occurring which could

SERVICE

ENGINE

SOON

Instrument Cluster

Instrument Cluster

10

damage your catalytic converter. Drive in a moderate fashion (avoid
heavy acceleration and deceleration) and have your vehicle serviced
immediately.

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.

Check fuel cap: Illuminates 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 to Fuel filler cap in the
Maintenance and Specifications chapter.

Brake system warning light: To
confirm the brake system warning
light is functional, it will
momentarily illuminate when the
ignition is turned to the ON position when the engine is not running, or
in a position between ON and START, or by applying the parking brake
when the ignition is turned to the ON position. If the brake system
warning light does not illuminate at this time, seek service immediately
from your dealership. Illumination after releasing the parking brake
indicates low brake fluid level and the brake system should be inspected
immediately by your servicing dealership.

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 dealer immediately.

Anti-lock brake system: If the
ABS light stays illuminated or
continues to flash, a malfunction has
been detected, have the system
serviced immediately. Normal
braking is still functional unless the brake warning light also is
illuminated.

ABS

Instrument Cluster

11

Air bag readiness: If this light fails
to illuminate when ignition is turned
to ON, continues to flash or remains
on, have the system serviced
immediately. A chime will also
sound when a malfunction in the supplemental restraint system has been
detected.

Safety belt: Reminds you to fasten
your safety belt. A chime will also
sound to remind you to fasten your
safety belt.

Charging system: Illuminates when
the battery is not charging properly.

Oil pressure/Engine coolant:
Illuminates when any of the
following conditions has occurred:
• The engine coolant temperature

is high.

• The engine oil pressure is low.
Low fuel: Illuminates when the fuel
level in the fuel tank is at or near
empty (refer to Fuel gauge in this
chapter).

Speed control: Illuminates when
the speed control is activated. Turns
off when the speed control system
is deactivated.

Transmission control indicator
light (TCIL): Illuminates when the
overdrive function of the
transmission has been turned off,
refer to the Driving chapter. If the
light flashes steadily or does not illuminate, have the transmission
serviced soon, or damage may occur.

LOW

FUEL

CRUISE

OVERDRIVE

Instrument Cluster

12

Four wheel drive low (if
equipped): Illuminates when
four-wheel drive low is engaged.

Four wheel drive indicator (if
equipped): Illuminates when
four-wheel drive is engaged.

Anti-theft system (if equipped):
Flashes when the Securilock

娂

Passive Anti-theft System has been
activated.

Door ajar: Illuminates when the
ignition is in the ON position and
any door is open.

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.

Key-in-ignition warning chime: Sounds when the key is left in the
ignition in the OFF/LOCK 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.

LOW

RANGE

4x4

DOOR

AJAR

Instrument Cluster

13