Page 1 of 328
Introduction 4
Instrument Cluster 10
Warning and control lights 10
Gauges 15
Entertainment Systems 17
AM/FM stereo cassette with CD 30
CD changer 36
Navigation system 38
Climate Controls 101
Dual automatic temperature control 101
Rear window defroster 104
Lights 105
Headlamps 105
Turn signal control 108
Bulb replacement 109
Driver Controls 115
Windshield wiper/washer control 115
Steering wheel adjustment 116
Power windows 129
Mirrors 130
Speed control 132
Message center 138
Locks and Security 146
Locks 146
Anti-theft system 157
Table of Contents
1
2005 Town Car(tow)
Owners Guide (post-2002-fmt)
USA_English(fus)
Page 10 of 328

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: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 to
On board diagnostics (OBD-II)in theMaintenance 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.
Electronic throttle control:
Illuminates when the engine has
SERVICE
ENGINE
SOON
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Owners Guide (post-2002-fmt)
USA_English(fus)
Instrument Cluster
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Trunk ajar:Illuminates when the
trunk is not completely closed. This
light will flash and sound a tone for
one second, then the light remains
on.
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.
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.
Key-in-ignition warning chime:Sounds when the key is left in the
ignition in the OFF/LOCK or ACCESSORY position and the driver’s door
is opened.
Turn signal chime (if equipped):Sounds when the turn signal lever
has been activated to signal a turn and not turned off after the vehicle is
driven more than 0.8 km (1/2 mile).
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Owners Guide (post-2002-fmt)
USA_English(fus)
Instrument Cluster
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Page 107 of 328

PANEL DIMMER CONTROL
Use to adjust the brightness of the
instrument panel during headlight
and parklamp operation.
•Rotate the thumbwheel from left
to right to brighten the
instrument panel.
•Rotate the thumbwheel from right
to left to dim the instrument
panel.
During full daylight, the instrument panel will still be visible with the
headlamps operating.
Domelamp Control
The panel dimmer control also controls the domelamp operation.
•Rotate the thumbwheel fully to the right, past detent to activate the
domelamp.
•In order to turn off the domelamp, rotate the thumbwheel to the left.
AIMING THE HEADLAMPS
The headlamps on your vehicle are properly aimed at the assembly plant.
If your vehicle has been in an accident the alignment of your headlamps
should be checked by a qualified service technician.
Vertical aim adjustment
1. Park the vehicle directly in front of a wall or screen on a level surface,
approximately 25 feet (7.6 meters) away.
•(1) 8 feet (2.4 meters)
•(2) Center height of lamp to
ground
•(3) 25 feet (7.6 meters)
•(4) Horizontal reference line
2. Measure the height of the
headlamp bulb center from the
ground and mark an 8 foot (2.4
meter) horizontal reference line on
the vertical wall or screen at this
height (a piece of masking tape works well).
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INTERIOR LAMPS
Map/Courtesy lamps
To turn on the map lamps, press the
map lamp control.
Rear courtesy/reading lamps
The courtesy lamp lights when:
•any door is opened.
•any of the remote entry controls
are pressed and the ignition is
OFF.
With the ignition key in the ACC or
ON position, the reading lamp can
be turned on by pressing the rocker
control.
BULBS
Headlamp Condensation
The headlamps are vented to equalize pressure. When moist air enters
the headlamp(s) through the vents, there is a possibility that
condensation can occur. This condensation is normal and will clear
within 45 minutes of headlamp operation.
Replacing exterior bulbs
Check the operation of all the bulbs frequently.
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Using the right bulbs
Replacement bulbs are specified in the following chart. 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
Headlamp (HI beam) 9005
Headlamp (LOW beam)* H7
Park and turn lamp (front) 3457 AK
Sidemarker (front) 168
Backup lamp 3156 K
Stop, tail, turn and sidemarker lamp (rear) 3157 K
Cornering lamp 3156 K
License plate lamp 168
High-mount brakelamp - Stop** 20 (LEDS)
Luggage compartment lamp 212-2
Map lamp 906
Visor vanity lamp - Slide on Rail system
(SOR)37
Rear grab handle reading lamps 578
Door courtesy lamp 904
Glove compartment 194
All replacement bulbs are clear in color except where noted.
To replace all instrument panel lights - see your dealer.
* For vehicles with HID lamps, see your dealer for service.
**When replacing the center high mount stop lamp, see your dealer for
replacement bulbs.
Replacing the interior bulbs
Check the operation of all bulbs frequently.
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Replacing headlamp bulbs
To remove the headlamp bulb:
1. Make sure headlamp switch is in
OFF position.
2. Remove the protective bulb cover
by loosening and removing the five
screws.
3. Rotate the light bulb socket
counter clockwise and pull it
straight out from the assembly.
4. Remove the old bulb from the
lamp assembly by pulling it straight
out of the bulb socket.
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.
5. To complete installation, follow the removal procedure in reverse
order.
Note:To ensure a good seal, attach the bulb cap and partially tighten
the screws. Check to ensure the gasket is fully centered. Finish
tightening the screws in a criss-cross pattern (upper-left, lower right
etc.)
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. When the bulb is burned
out, the bulb and starter capsule assembly must be replaced by your
dealer or a qualified technician.
Replacing front parking lamp/turn signal/ sidemarker bulbs
The park/turn lamp bulbs can be replaced without removing the
headlamp assembly.
1. Make sure headlamp switch is in OFF position, then open the hood.
2. Remove the protective bulb cover by removing the three retaining
bolts.
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3. Rotate the bulb socket
counterclockwise and remove from
lamp assembly.
4. Carefully pull bulb straight out of
the socket and push in the new bulb
until it snaps, locking it into
position.
5. To complete installation, follow
the removal procedure in reverse
order.
Replacing tail lamp/brake/turn lamp bulbs
The tail lamp, the brake lamp and the turn signal lamp bulbs are located
in the tail lamp assembly. Follow the same steps to replace either bulb.
1. Make sure headlamp switch is in
OFF position, then open the trunk
and carefully pull the carpet away to
expose the plastic retainer.
2. Remove plastic retainer to expose
the lamp assembly hardware.
3. Remove three nut and washer
assemblies and the lamp assembly
from the vehicle.
4. Remove the bulb socket by
rotating it counterclockwise, then
pulling it out of the lamp assembly.
5. Pull the bulb from the socket and
push in the new bulb.
6. Install the bulb socket into the
lamp assembly by rotating it
clockwise.
7. Install the lamp assembly on the
vehicle with three nut and washer
2005 Town Car(tow)
Owners Guide (post-2002-fmt)
USA_English(fus)
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