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typical operating range for your remote entry
transmitter is approximately 10 meters (33 feet). A
decrease in the operating range could be caused by:
•weather conditions,
•nearby radio towers,
•structures around the vehicle and
•other vehicles parked next to the vehicle.
To replace the battery:
1. Twist a thin coin
between the two halves
of the remote entry
transmitter near the
key ring. DO NOT
TAKE THE RUBBER
COVER AND CIRCUIT
BOARD OFF THE FRONT HOUSING OF THE
REMOTE ENTRY TRANSMITTER.
2. Do not wipe off any
grease on the battery
terminals on the back
surface of the circuit
board.
3. Remove the old battery.
4. Insert the new battery. Refer to the diagram
inside the remote entry transmitter for the correct
orientation of the battery. Press the battery down to
ensure that the battery is fully seated in the battery
housing cavity.
5. Snap the two halves back together.
Note:Replacement of the battery willnotcause the
remote transmitter to become deprogrammed from
your vehicle. The remote transmitter should operate
normally after battery replacement.
Replacing lost remote entry transmitters
If you would like to have your remote entry
transmitter reprogrammed because you lost one, or
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Locks and Security
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Page 60 of 240

Illuminated entry
The interior lamps illuminate when the remote entry
system is used to unlock the door(s) or sound the
personal alarm.
The illuminated entry system will turn off the
interior lights if:
•the ignition switch is turned to the ON position,
or
•the remote transmitter lock control is pressed, or
•after 25 seconds of illumination.
The dome lamp control (if equipped) mustnotbe
set to the OFF position for the illuminated entry
system to operate.
The inside lights will not turn off if:
•they have been turned on with the dimmer
control, or
•any door is open.
The battery saver will shut off the interior lamps 30
minutes after the ignition has been turned to the
OFF position, 10 minutes after if the last door is left
open, and 30 minutes after if the trunk is left open
or the dome lamp switch is left on.
SECURILOCKPASSIVE ANTI-THEFT SYSTEM
SecuriLockpassive anti-theft system is an engine
immobilization system. This system is designed to
prevent the engine from being started unless a
coded key programmed to your vehicleis used.
The use of the wrong type of coded key may lead to
a“no-start”condition.
Your vehicle comes with two coded keys; additional
coded keys may be purchased from your dealer. The
dealer can program your spare keys to your vehicle
or you can program the keys yourself. Refer to
Programming spare keysfor instructions on how
to program the coded key.
Note:The SecuriLockpassive anti-theft system is
not compatible with non-Ford aftermarket remote
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Locks and Security
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Page 124 of 240

HAZARD FLASHER
The hazard flasher is
located on the steering
column, just behind the
steering wheel. The
hazard flashers will
operate when the
ignition is in any
position or if the key is
not in the ignition.
Push in the flasher control and all front and rear
direction signals will flash. Press the flasher control
again to turn them off. Use it when your vehicle is
disabled and is creating a safety hazard for other
motorists.
Note:With extended use, the flasher may run down
your battery.
FUEL PUMP SHUT-OFF SWITCH
FUEL
RESET
This device stops the electric fuel pump from
sending fuel to the engine when your vehicle has
had a substantial jolt.
After an accident, if the engine cranks but does not
start, this switch may have been activated.
The fuel pump shut-off
switch is located on
the left side of the
trunk between the left
rear tail light and the
trunk liner, and to the
left of the hole in the
trunk liner
To reset the switch:
1. Turn the ignition OFF.
2. Check the fuel system for leaks.
3. If no leaks are apparent, reset the switch by
pushing in on the reset button.
4. Turn the ignition ON.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Roadside Emergencies
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Page 161 of 240

SERVICE RECOMMENDATIONS
To help you service your vehicle:
•We highlight do-it-yourself items in the engine
compartment for easy location.
•We provide a scheduled maintenance guide which
makes tracking routine service easy.
If your vehicle requires professional service, your
dealership can provide the necessary parts and
service. Check yourWarranty Guide/Owner
Information Guideto find out which parts and
services are covered.
Use only recommended fuels, lubricants, fluids and
service parts conforming to specifications. Motorcraft
parts are designed and built to provide the best
performance in your vehicle.
PRECAUTIONS WHEN SERVICING YOUR
VEHICLE
•Do not work on a hot engine.
•
Make sure that nothing gets caught in moving parts.
•Do not work on a vehicle with the engine running
in an enclosed space, unless you are sure you
have enough ventilation.
•Keep all open flames and other burning
(cigarettes) material away from the battery and
all fuel related parts.
Working with the engine off
•Automatic transmission:
1. Set the parking brake and shift to P (Park).
2. Turn off the engine and remove the key.
3. Block the wheels.
•Manual transmission:
1. Set the parking brake, depress the clutch and
place the gearshift in 1 (First).
2. Turn off the engine and remove the key.
3. Block the wheels.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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