Page 39 of 240

Using the right bulbs
Replacement bulbs are specified in the chart below.
Headlamp bulbs must be marked with an authorized
“D.O.T.”for North America and an“E”for Europe to
assure lamp performance, light brightness and
pattern and safe visibility. The correct bulbs will not
damage the lamp assembly or void the lamp
assembly warranty and will provide quality bulb burn
time.
Function Trade Number
Tail lamp, brakelamp, turn lamp 3157K
Park lamp, turn lamp, side marker
(front)3157 AK (amber)
Backup lamp 3156K
License plate lamp 168
High-mount brakelamp 906
Headlamps 9007
Luggage compartment lamp 906
Dome lamp 575
Map lamp 575
Visor vanity lamp 74
Glove compartment 194
Rearview mirror map lamps 192
Fog lamp 899
All replacement bulbs are clear in color except where
noted.
To replace all instrument panel lights - see your dealer.
Interior bulbs
Check the operation of all bulbs frequently.
Map lamps
For bulb replacement, see a qualified service
technician or your dealer.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Lights
39
Page 61 of 240

start systems. Use of these systems may result in
vehicle starting problems and a loss of security
protection.
Note:Large metallic objects, electronic devices that
are used to purchase gasoline or similar items, or a
second coded key on the same key chain may cause
vehicle starting issues. You need to prevent these
objects from touching the coded key while starting
the engine. These objects will not cause damage to
the coded key, but may cause a momentary issue if
they are too close to the key when starting the
engine. If a problem occurs, turn the ignition off,
remove all objects on the key chain away from the
coded key and restart the engine.
Theft indicator
The theft indicator is located in the instrument
cluster.
•When the ignition is in the OFF position, the
indicator will flash once every 2 seconds to
indicate the SecuriLocksystem is functioning as
a theft deterrent.
•When the ignition is in the ON position, the
indicator will glow for 3 seconds, then turn off to
indicate normal system functionality.
If a problem occurs with the SecuriLocksystem,
the indicator will flash rapidly or glow steadily when
the ignition is in the ON position. If this occurs, the
vehicle should be taken to an authorized dealer for
service.
Automatic arming
The vehicle is armed
immediately after
switching the ignition
to the 3 (OFF)
position.
The
THEFTindicator
will flash every two
seconds when the
vehicle is armed.
3
2
1
5
4
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Locks and Security
61
Page 62 of 240

Automatic disarming
Switching the ignition to the 4 (ON) position with a
coded keydisarms the vehicle.
•The
THEFTindicator will illuminate for three
seconds and then go out.
•If the
THEFTindicator stays on for an extended
period of time or flashes rapidly, have the system
serviced by your dealer.
Replacement keys
If your keys are lost or stolen and you don’t have an
extra coded key, you will need to have your vehicle
towed to a dealership. The key codes need to be
erased from your vehicle and new coded keys will
need to be programmed.
Replacing coded keys can be very costly. Store an
extra programmed key away from the vehicle in a
safe place to help prevent any inconveniences.
Please visit an authorized dealer to purchase
additional spare or replacement keys.
Programming spare keys
You can program your own coded keys to your
vehicle. Please read and understand the entire
procedure before you begin.
Tips:
•A maximum of eight keys can be coded to your
vehicle.
•Only use Securilockkeys.
•You must have two previously programmed coded
keys (keys that already operate your vehicle’s
engine) and the new unprogrammed key(s)
readily accessible.
•If no previously programmed coded keys are
available, you must take your vehicle to your
dealer to have the spare key(s) programmed.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Locks and Security
62
Page 81 of 240

Do not put anything on or over the air bag
module. Placing objects on or over the air
bag inflation area may cause those objects to be
propelled by the air bag into your face and torso
causing serious injury.
Do not attempt to service, repair, or modify
the air bag supplemental restraint systems
or its fuses. See your Ford or Lincoln Mercury
dealer.
Modifying or adding equipment to the front
end of the vehicle (including frame, bumper,
front end body structure and tow hooks) may
affect the performance of the air bag system,
increasing the risk of injury. Do not modify the
front end of the vehicle.
Children and air bags
Children must always
be properly restrained.
Accident statistics
suggest that children
are safer when
properly restrained in
the rear seating
positions than in the
front seating position.
Failure to follow these
instructions may
increase the risk of
injury in a collision.
Air bags can kill or injure a child in a child
seat.NEVERplace a rear-facing child seat
in front of an active air bag. If you must use a
forward-facing child seat in the front seat, move
the seat all the way back.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
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Page 84 of 240

A difficulty with the system is indicated by one or
more of the following:
•The readiness light
will either flash or
stay lit.
•The readiness light will not illuminate immediately
after ignition is turned on.
•A series of five beeps will be heard. The tone
pattern will repeat periodically until the problem
and/or light are repaired.
If any of these things happen, even intermittently,
have the SRS serviced at your dealership or by a
qualified technician immediately. Unless serviced,
the system may not function properly in the event of
a collision.
Disposal of air bags and air bag equipped
vehicles
See your local dealership or qualified technician. Air
bags MUST BE disposed of by qualified personnel.
SAFETY RESTRAINTS FOR CHILDREN
See the following sections for directions on how to
properly use safety restraints for children. Also see
Air bag supplemental restraint system (SRS)in
this chapter for special instructions about using air
bags.
Important child restraint precautions
You are required by law to use safety restraints for
children in the U.S. and Canada. If small children
(generally children who are four years old or
younger and who weigh 18 kg [40 lbs] or less) ride
in your vehicle, you must put them in safety seats
made especially for children. Many states require
that children use approved booster seats until they
are eight years old. Check your local and state or
provincial laws for specific requirements regarding
the safety of children in your vehicle. When possible,
always place children under age 12 in the rear seat
AIR
BAG
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
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Page 102 of 240
•Turn the key to 4
(ON) without
turning the key to 5
(START).
Make sure the corresponding lights illuminate or
illuminate briefly. If a light fails to illuminate, have
the vehicle serviced.
•If the driver’s safety belt is fastened, the
light
may not illuminate.
1
2
34
5
P! BRAKE
L
0
00000 00
C
E
FH
LH
10 203020 406080100
120
140
160
180
405060 70
80
90
100
11 0
1204
5
6
7 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
CHECK
FUEL
CAP
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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Page 104 of 240

Important ventilating information
If the engine is idling while the vehicle is stopped
for a long period of time, open the windows at least
2.5 cm (one inch) or adjust the heating or air
conditioning to bring in fresh air.
BRAKES
Occasional brake noise is normal. If a metal-to-metal,
continuous grinding or continuous squeal sound is
present, the brake linings may be worn-out and
should be inspected by a qualified service
technician. If the vehicle has continuous vibration or
shudder in the steering wheel while braking, the
vehicle should be inspected by a qualified service
technician.
Refer toBrake system
warning lightin the
Instrument Cluster
chapter for information
on the brake system warning light.
Four-wheel anti-lock brake system (ABS)
(if equipped)
Your vehicle may be equipped with an Anti-lock
Braking System (ABS). This system helps you
maintain steering control during emergency stops by
keeping the brakes from locking. Noise from the
ABS pump motor and brake pedal pulsation may be
observed during ABS braking; any pulsation or
mechanical noise you may feel or hear is normal.
ABS warning lamp
ABS
The ABS lamp in the
instrument cluster
momentarily illuminates
when the ignition is
turned to ON. If the light does not illuminate during
start up, remains on or flashes, the ABS may be
disabled and may need to be serviced.
P!
BRAKE
ABS
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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Even when the ABS is
disabled, normal
braking is still effective.
(If your BRAKE
warning lamp illuminates with the parking brake
released, have your brake system serviced
immediately.)
Using ABS
When hard braking is required, apply continuous
force on the brake pedal; do not pump the brake
pedal since this will reduce the effectiveness of the
ABS and will increase your vehicle’s stopping
distance. The ABS will be activated immediately,
allowing you to retain full steering control during
hard braking and on slippery surfaces. However, the
ABS does not decrease stopping distance.
Hydraulic brake booster system (Hydroboost)
(if equipped)
The Hydroboost system receives fluid pressure from
the power steering pump to provide power assist
during braking.
For Hydroboost-equipped vehicles operating under
normal conditions, the noise of the fluid flowing
through the booster may be heard whenever the
brake is applied. This condition is normal; vehicle
service is not required.
If braking performance or pedal response becomes
very poor, even when the pedal is strongly
depressed, it may indicate the presence of air in the
hydraulic system or leakage of fluid. Stop the vehicle
safely as soon as possible and seek service
immediately.
P!
BRAKE
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
105