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 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 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 194 of 240

If the vehicle’s powertrain system or its battery has
just been serviced, the on-board diagnostics system
is reset to a“not ready for I/M test”condition. To
ready the on-board diagnostics system for I/M
testing, a minimum of 30 minutes of city and
highway driving is necessary as described below:
•First, at least 10 minutes of driving on an
expressway or highway.
•Next, at least 20 minutes driving in stop-and-go,
city-type traffic with at least four idle periods.
Allow the vehicle to sit for at least eight hours
without starting the engine. Then, start the engine
and complete the above driving cycle. The engine
must warm up to its normal operating temperature.
Once started, do not turn off the engine until the
above driving cycle is complete.
CHECKING AND ADDING POWER STEERING
FLUID
Check the power steering fluid. Refer to the
scheduled maintenance guide for the service interval
schedules. If adding fluid is necessary, use only
MERCONAT F.
If your vehicle is
equipped with the
OHV V6 engine,
check the power
steering fluid level with
the engine at normal
operating temperature.
1. Start the engine and
let it run until it
reaches normal
operating temperature
(the engine coolant
temperature gauge
indicator will be near
the center of the
normal area between H
and C).
FILL
HOT
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
194