Page 9 of 240
Vehicle Symbol Glossary
Child Safety Door
Lock/Unlock
Interior Luggage
Compartment
Release Symbol
Panic AlarmEngine Oil
Engine CoolantEngine Coolant
Temperature
Do Not Open When
HotBattery
Avoid Smoking,
Flames, or SparksBattery Acid
Explosive GasFan Warning
Power Steering
FluidMaintain Correct
Fluid LevelMAX
MIN
Emission SystemEngine Air Filter
Passenger
Compartment Air
FilterJack
Check fuel capLow tire warning
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Introduction
9
Page 10 of 240

WARNING LIGHTS AND CHIMES
Base instrument cluster
Optional instrument cluster
Mach 1 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.
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
P! BRAKE
L
0
00000 00
C
E
FH
LH
102040608020 40608010 012 0 14 0
160
180
200
220
240
100
120
140
305070 90
110
13 0
1504
5
6
7
8 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOONCHECK
FUEL
CAP
MPH km/h
ABS
.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
10
Page 11 of 240

Service engine soon:
TheService engine
soonindicator 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 toOn
board diagnostics (OBD-II)in theMaintenance
and Specificationschapter. If the light is blinking,
engine misfire is occurring which could 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 light to come on. Refer toFuel
filler capin theMaintenance 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
SERVICE
ENGINE
SOON
CHECK
FUEL
CAP
P!
BRAKE
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
11
Page 14 of 240
GAUGES
Base instrument cluster gauges
Optional instrument cluster gauges
Mach 1 instrument cluster gauges
Speedometer:Indicates the current vehicle speed.
•Base instrument
cluster
P! BRAKE
L C
EFH
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
00000 00.
CHECK
FUEL
CAP
P! BRAKE
0
00000 00
FH
H
102040608020 40608010 012 0 14 0
160
180
200
220
240
100
120
140
305070 90
110
13 0
1504
5
6
7
8 3
2
1
H
THEFT
RPMX1000
FUEL DOORSELECT/RESET
LOW
FUELO/D
OFF AIR
BAGSERVICE
ENGINE
SOON
MPH km/h
ABS
.
L
LCHECK
FUEL
CAP
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
14
Page 16 of 240
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.
•Base instrument
cluster
•Optional instrument
cluster
•Mach 1 instrument
cluster
Battery voltage
gauge: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.
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 dealership or by a
qualified technician.
LH
LH
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
16
Page 100 of 240

accelerator when you have difficulty starting the
engine. For more information on starting the vehicle,
refer toStarting the enginein this chapter.
Extended idling at high engine speeds can
produce very high temperatures in the
engine and exhaust system, creating the risk of
fire or other damage.
Do not park, idle, or drive your vehicle in
dry grass or other dry ground cover. The
emission system heats up the engine compartment
and exhaust system, which can start a fire.
Do not start your vehicle in a closed garage
or in other enclosed areas. Exhaust fumes
can be toxic. Always open the garage door before
you start the engine. SeeGuarding against
exhaust fumesin this chapter for more
instructions.
If you smell exhaust fumes inside your
vehicle, have your dealer inspect your
vehicle immediately. Do not drive if you smell
exhaust fumes.
When the key is in the ignition and in the
OFF position, the automatic transmission
shift lever can be moved from the P (Park)
position without the brake pedal depressed. To
avoid unwanted vehicle movement, always set the
parking brake.
Important safety precautions
When the engine starts, the idle RPM runs faster to
warm the engine. If the engine idle speed does not
slow down automatically, have the vehicle checked.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
100
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
102
Page 106 of 240

Parking brake
To set the parking
brake (1), pull the
parking brake handle
up as far as possible.
The BRAKE warning
lamp will illuminate and
will remain illuminated
until the parking brake
is released.
To release, press and hold the button (2), pull the
handle up slightly, then push the handle down.
Always set the parking brake fully and make
sure that the gearshift is securely latched in
P (Park) (automatic transmission) or in 1 (First)
(manual transmission).
If the parking brake is fully released, but the
brake warning lamp remains illuminated, the
brakes may not be working properly. See your
dealer or a qualified service technician.
STEERING
To prevent damage to the power steering system:
•Never hold the steering wheel at its furthest
turning points (until it stops) for more than a few
seconds when the engine is running.
•Do not operate the vehicle with a low power
steering pump fluid level (below the MIN mark on
the reservoir).
If the power steering system breaks down (or if the
engine is turned off), you can steer the vehicle
manually, but it takes more effort.
If the steering wanders or pulls, check for:
•an improperly inflated tire
12
P!
BRAKE
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
106