HEADLAMP CONTROL
Turns the lamps off.
Turns on the parking
lamps, instrument panel lamps,
license plate lamps and tail lamps.
Turns the headlamps on.
Autolamp control
The autolamp system provides light
sensitive automatic on-off control of
the exterior lights normally
controlled by the headlamp control.
The autolamp system also keeps the
lights on for a predetermined period
of time after the ignition switch is
turned to OFF.
•To turn autolamps on, rotate the
control counterclockwise to the
next position from OFF.
•To turn autolamps off, rotate the control clockwise past OFF to the
parking lamp position
, then back to OFF.
The headlamps will turn on under the following conditions:
1. Headlamp switch is turned to the “headlamps on position”.
2. With the ignition in ON or START, wipers turned on and the headlamp
switch in the autolamp position.
Daytime running lamps (DRL) (if equipped)
Turns the lowbeam headlamps on with a reduced output. To activate:
•the key must be in the ON position,
•the parking brake released, and
•the headlamp control is in the OFF or Parking lamps position.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
38
Function Trade Number
High-mount brakelamp 912
Luggage compartment lamp 212-2
Rear reading lamp 578
Map lamp 906
Visor vanity lamp - Slide on Rail system
(SOR)37
Dual floorwell lamp 906
Glove compartment 168
All replacement bulbs are clear in color except where noted.
To replace all instrument panel lights - see your dealer.
Replacing the interior bulbs
Check the operation of all bulbs frequently.
Replacing headlamp bulbs
To remove the headlamp bulb:
1. Make sure the headlamp control is in the OFF position, then open the
hood.
2. Remove the three pin type retainers and the radiator sight shield.
3. Disconnect the electrical
connector.
4. Remove the headlamp retainer
bolts and the headlamp assembly.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
44
Replacing front parking/cornering/turn signal lamp bulbs
The park/turn/cornering 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 three pin type retainers and the radiator shield.
3. Loosen the parking lamp attachments, on the back side of the lamp,
and pull the lamp assembly forward.
4. Remove the bulb from the side turn lamp assembly.
5. Disconnect the electrical connector from the bulb and replace the
bulb.
Note:The parking lamp/turn signal bulbs should not be removed from
the lamp until just before a replacement bulb is installed. Removing the
bulb for an extended period of time may affect headlamp bulb
performance. Contaminants may enter the headlamp where they can
settle on the lens and reflector. Never turn the lamps on with the bulb
removed.
6. To install, reverse the order of the removal procedure.
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 remove plastic retainer to
expose the lamp assembly hardware.
2. Carefully pull the carpet away to
expose the plastic retainer.
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.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
46
Replacing high-mount brakelamp bulbs
1. Make sure headlamp switch is in
OFF position, then remove two
screws from the lamp assembly.
2. Carefully lift the lamp assembly
up for access to the bulbs.
3. Carefully pull the bulb socket out
of the lamp assembly.
4. Pull the bulb straight out of the
socket and push in the new bulb.
To install, reverse the removal
procedure.
Overhead console lamps
To remove and replace the lamps in the overhead console:
1. Make sure the headlamp switch is
in the OFF position and remove the
overhead console from the headliner
by pulling it straight down.
2. Remove the bulb socket from the
back of the lamp housing by pulling
it straight out.
3. Remove the bulb from the socket
by pulling straight out.
Install the new bulb in reverse order.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
48
(darkened) state when bright lights (glare) reach the mirror. When the
mirror detects bright light from behind the vehicle, it will automatically
adjust (darken) to minimize glare.
The mirror will automatically return to the normal state whenever the
vehicle is placed in R (Reverse) to ensure a bright clear view when
backing up.
Do not block the sensor on the backside of the inside rear view mirror
since this may impair proper mirror performance.
POWER ADJUSTABLE FOOT PEDALS (IF EQUIPPED)
The accelerator and brake pedal
should only be adjusted when the
vehicle is stopped and the gearshift
lever is in the P (Park) position.
Press and hold the rocker control to
adjust accelerator and brake pedal.
•Press the right side of the control to adjust the pedals toward you.
•Press the left side of the control to adjust the pedals away from you.
The adjustment allows for approximately 2.5 inches (65 mm) of
maximum travel.
Never adjust the accelerator and brake pedal with feet on the
pedals while the vehicle is moving.
SPEED CONTROL (IF EQUIPPED)
With speed control set, you can maintain a speed of 30 mph (48 km/h)
or more without keeping your foot on the accelerator pedal. Speed
control does not work at speeds below 30 mph (48 km/h).
Do not use the speed control in heavy traffic or on roads that
are winding, slippery or unpaved.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
63
Trailer lamps
Trailer lamps are required on most towed vehicles. Make sure all running
lights, brake lights, turn signals and hazard lights are working. See your
dealer or trailer rental agency for proper instructions and equipment for
hooking up trailer lamps.
Driving while you tow
When towing a trailer:
•Turn off the speed control. The speed control may shut off
automatically when you are towing on long, steep grades.
•Consult your local motor vehicle speed regulations for towing a trailer.
•To eliminate excessive shifting, use a lower gear. This will also assist
in transmission cooling. (For additional information, refer to
Understanding the gearshift positions of the 4–speed automatic
transmissionin theDriving chapter.
•Anticipate stops and brake gradually.
•Do not exceed the GCWR rating or transmission damage may occur.
Servicing after towing
If you tow a trailer for long distances, your vehicle will require more
frequent service intervals. Refer to yourScheduled Maintenance
Informationfor more information.
Trailer towing tips
•Practice turning, stopping and backing up before starting on a trip to
get the feel of the vehicle trailer combination. When turning, make
wider turns so the trailer wheels will clear curbs and other obstacles.
•Allow more distance for stopping with a trailer attached.
•If you are driving down a long or steep hill, shift to a lower gear. Do
not apply the brakes continuously, as they may overheat and become
less effective.
•The trailer tongue weight should be 10–15% of the loaded trailer
weight.
•After you have traveled 50 miles (80 km), thoroughly check your
hitch, electrical connections and trailer wheel lug nuts.
•To aid in engine/transmission cooling and A/C efficiency during hot
weather while stopped in traffic, place the gearshift lever in P (Park).
•Vehicles with trailers should not be parked on a grade. If you must
park on a grade, place wheel chocks under the trailer’s wheels.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Tires, Wheels and Loading
161
Keys .......................................78, 90
positions of the ignition .........163
L
Lamps
autolamp system .......................38
bulb replacement
specifications chart ..................43
daytime running light ...............38
headlamps .................................38
headlamps, flash to pass ..........39
instrument panel, dimming .....39
interior lamps ...............42–44, 48
replacing bulbs ....... 43–44, 46–48
Lane change indicator (see
Turn signal) .................................41
Lights, warning and indicator ....10
anti-lock brakes (ABS) ..........168
Limited slip axle (see Traction
Loc) ............................................178
Load limits .................................153
Locks
autolock .....................................85
childproof ..................................79
doors ..........................................78
Lubricant specifications ...242, 244
Lug nuts ....................................143
Lumbar support, seats ...............93
M
Message center ...........................72
reset button ..............................72
select button .............................73
Mirrors .........................................50
automatic dimming rearview
mirror ........................................62
fold away ...................................62heated ........................................62
side view mirrors (power) .......62
Moon roof ....................................67
Motorcraft parts ................230, 240
O
Octane rating ............................229
Oil (see Engine oil) ..................213
P
Parking brake ............................169
Parts (see Motorcraft parts) ....240
Passenger Occupant
Classification Sensor ...................97
Pedals (see Power adjustable
foot pedals) .................................63
Power adjustable foot pedals .....63
Power distribution box (see
Fuses) ........................................186
Power door locks ..................78, 85
Power mirrors .............................62
Power point .................................60
Power steering ..................171–172
fluid, checking and adding ....235
fluid, refill capacity ................241
fluid, specifications .................242
Power Windows ...........................61
R
Radio ................................20, 23, 28
Rear window defroster ...............37
Relays ................................182, 189
Remote entry system .................80
illuminated entry ......................84
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Index
253
Transmission .............................173
brake-shift interlock
(BSI) ................................173–174
fluid, checking and adding
(automatic) .............................236
fluid, refill capacities ..............241
lubricant specifications ..242, 244
Trunk ...........................................79
remote release ....................76, 82
Turn signal ..................................41
V
Vehicle dimensions ...................244
Vehicle Identification Number
(VIN) ..........................................246
Vehicle loading ..........................153Ventilating your vehicle
...........166
W
Warning lights (see Lights)
.......10
Washer fluid
..............................213
Water, Driving through
.............179
Windows
power
.........................................61
Windshield washer fluid and
wipers
..........................................49
checking and adding fluid
.....213
replacing wiper blades
.............49
Wrecker towing
.........................195
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Index
255