Page 1 of 368
Introduction 4
Instrument Cluster 10Warning and control lights 10
Gauges 14
Entertainment Systems 16AM/FM stereo cassette with CD 16
AM/FM stereo with CD 21
Rear seat controls 25
Rear seat entertainment system 30
Navigation system 43
Climate Controls 94Rear passenger climate control 97
Rear window defroster 98
Lights 99Headlamps 99
Turn signal control 102
Bulb replacement 103
Driver Controls 112Windshield wiper/washer control 112
Power windows 119
Mirrors 122
Speed control 126
Message center 136
Locks and Security 153Keys 153
Locks 153
Anti-theft system 154
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Table of Contents
Table of Contents
1
Page 10 of 368

WARNING LIGHTS AND CHIMES
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
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
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.
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,
P!BRAKE
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Instrument Cluster
Instrument Cluster
10
Page 13 of 368

O/D off: 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.
AdvanceTrac (if equipped):
Illuminates when the AdvanceTrac
system is active. If the light remains
on, have the system serviced
immediately.
Speed control: Illuminates when
the speed control is activated. Turns
off when the speed control system
is deactivated.
Four wheel drive low (if
equipped): Illuminates when
four-wheel drive low is engaged.
Four wheel drive high (if
equipped): Illuminates when
four-wheel drive high is engaged.
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 ACC 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.
Door ajar warning chime: Sounds when any door, liftgate or the
liftgate glass is opened (or not fully closed). 4x4
LOW
4x4
HIGH
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Instrument Cluster
13
Page 103 of 368

INTERIOR LAMPS
Front row map lights (if equipped)
To turn on the map lights, press the
rear edge of the light.
Rear dome lamp
The dome lamp lights when:
• any door is opened (and switch is
in middle position).
• the instrument panel dimmer
switch is held up until the
courtesy lamps come on.
• any of the remote entry controls
are pressed and the ignition is OFF (and switch is in the middle
position).
With the ignition key in the ACC or ON position, the rear dome lamp can
be turned ON or OFF by sliding the control.
BULBS
Replacing exterior bulbs
Check the operation of all the bulbs frequently.
Using the right bulbs
Replacement bulbs are specified in the chart below. Headlamp bulbs
must be marked with an authorized “ D.O.T. ” 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.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Lights
103
Page 104 of 368

Function Number of bulbs Trade number
Headlamps
(low-beams) 2 9006
Headlamps (hi-beam) 2 9005
Front park/turn lamps 2 3157 AK (amber)
Front sidemarker 2 194 AK (amber)
Foglamps 2 800
Dome/map lamps 2 579
Turn/tail/brake lamps 2 3157K
Approach lamps 2 906
Mirror turn signal
lamps 2 906 (amber)
Liftgate lamp 2 916
Backup lamp 2 3157K
License lamp 2 168
High-mount brake
lamp 5 W5W
All replacement bulbs are clear in color except where noted.
To replace all instrument panel lights - see your dealer
* For vehicles with HID (high intensity discharge) lamps, see your dealer
for service.
Replacing the interior bulbs
Check the operation of all bulbs frequently.
Map lamps
To change the map lamp bulbs:
1. Use a small screwdriver to
remove the map lamp lens.
2. To remove the old bulb, twist 1
⁄ 4
turn and pull it out.
3. Twist in a new bulb.
4. Align and press the map lamp
lens back on and test the lamp operation.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Lights
104
Page 105 of 368

Replacing headlamp bulbs
1. Make sure the headlamp control is in the OFF position.
2. Open the hood.
3. At the back of the headlamp lens,
remove the three headlamp
assembly retainers bolts.
4. Pull the headlamp assembly
forward slightly to expose the
electrical connectors.
5. Rotate the bulb covers
counterclockwise and remove.
6. Once the bulb covers are
removed, the bulbs can be removed
by turning them counterclockwise
and then pulling the bulbs straight
out.
Handle a halogen headlamp bulb carefully and keep out of
children ’ s reach. Grasp the bulb only by its plastic base and do
not touch the glass. The oil from your hand could cause the bulb to
break the next time the headlamps are operated.
7. Insert the glass end of the new bulb into the headlamp assembly.
When the grooves in the plastic base are aligned, push the bulb into the
lamp assembly until the plastic base contacts the rear of the lamp
assembly. Turn the bulb counterclockwise to install.
8. Reinstall the bulb cover and secure it in place by turning
counterclockwise.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Lights
105
Page 106 of 368

Replacing HID headlamp bulbs (if equipped)
The low beam headlamps on your vehicle use a “ high intensity discharge ”
source. These lamps operate at a high voltage. The bulb is NOT
replaceable. When the bulb is burned out, the lamp assembly must be
replaced by your dealer or a qualified technician.
Replacing front parking lamp/turn signal bulbs
1. Make sure the headlamp control is in the OFF position.
2. Open the hood.
3. At the back of the headlamp lens,
remove the three headlamp
assembly bolts.
4. Pull the headlamp assembly
forward slightly to expose the
electrical connectors.
5. Rotate the bulb socket
counterclockwise and remove.
6. Pull the bulb straight out of the
socket and push in the new bulb.
7. To complete installation of the
parking lamp/turn signal assembly,
follow the removal procedures in
reverse order.
Replacing foglamp bulbs
Handle a halogen headlamp bulb carefully and keep out of
children ’ s reach. Grasp the bulb only by its plastic base and do
not touch the glass. The oil from your hand could cause the bulb to
break the next time the headlamps are operated.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Lights
106
Page 107 of 368

1. Make sure the headlamp switch is
in the OFF position.
2. Disconnect the electrical
connector from the foglamp bulb.
3. Rotate the foglamp bulb
counterclockwise and remove from
the foglamp (the rear side of the
foglamp is shown).
4. Install the foglamp bulb in
foglamp by rotating clockwise.
5. Connect the electrical connector
to the new foglamp bulb
Replacing tail lamp bulbs
1. Make sure the headlamp switch is
in the OFF position.
2. Open the liftgate to expose the
lamp assembly screws.
3. Remove the two screws from the
lamp assembly.
4. Carefully pry the lamp assembly
away from the vehicle, by pulling
the assembly directly straight out, to
expose the bulb socket. DO NOT
TIP THE LAMP ASSEMBLY SIDEWAYS.
5. Rotate the bulb socket counterclockwise and remove from lamp
assembly.
6. Pull bulb straight out of socket and push in the new bulb.
7. Install the bulb socket into the lamp assembly and rotate clockwise.
8. Install the lamp assembly on the vehicle and secure with two screws.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Lights
107