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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 on a level surface approximately 7.6 meters (25 feet)
from a vertical wall or screen directly in front of it.
•(1) Eight feet
•(2) Center height of lamp to
ground
•(3) Twenty five feet
•(4) Horizontal reference line
2. Measure the height of the headlamp bulb center from the ground and
mark a 2.5 meter (8 foot) horizontal reference line on the vertical wall or
screen at this height (a piece of masking tape works well).
3. Turn on the low beam headlamps to illuminate the wall or screen and
open the hood.
4. On the wall or screen you will
observe an area of high intensity
light. The top of the high intensity
area should touch the horizontal
reference line, if not, the beam will
need to be adjusted.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Lights
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Function Trade Number
Tail, stop, turn and sidemarker lamp (rear) 3157K
Backup lamp 3156K
License plate lamp 168
High-mount brakelamp 912
Luggage compartment lamp 212-2
Dome lamp 906
Rear reading lamp 211-2
Map lamp 168
Illuminated visor mirror 7065
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.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Lights
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Page 43 of 240

Replacing front parking/cornering/turn signal lamp bulbs
The park/turn/cornering lamp bulbs can be replaced with out 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.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Lights
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OPENING THE HOOD
1. Inside the vehicle, pull the hood
release handle located under the
instrument panel.
2. Go to the front of the vehicle and
release the auxiliary latch that is
located under the front of the hood.
3. Lift the hood until the lift
cylinders hold it open.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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Page 184 of 240

WINDSHIELD WASHER FLUID
Add fluid to fill the reservoir if the
level is low. In very cold weather, do
not fill the reservoir completely.
Only use a washer fluid that meets
Ford specification WSB-M8B16–A2.
Refer toLubricant specifications
in this chapter.
State or local regulations on volatile organic compounds may restrict the
use of methanol, a common windshield washer antifreeze additive.
Washer fluids containing non-methanol antifreeze agents should be used
only if they provide cold weather protection without damaging the
vehicle’s paint finish, wiper blades or washer system.
If you operate your vehicle in temperatures below 4.5°C (40°F),
use washer fluid with antifreeze protection. Failure to use
washer fluid with antifreeze protection in cold weather could result in
impaired windshield vision and increase the risk of injury or accident.
Note:Do not put washer fluid in the engine coolant reservoir. Washer
fluid placed in the cooling system may harm engine and cooling system
components.
ENGINE OIL
Checking the engine oil
Refer to the scheduled maintenance guide for the appropriate intervals
for checking the engine oil.
1. Make sure the vehicle is on level ground.
2. Turn the engine off and wait up to 10 minutes for the oil to drain into
the oil pan.
3. Set the parking brake and ensure the gearshift is securely latched in P
(Park).
4. Open the hood. Protect yourself from engine heat.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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recommendations ...................187
refill capacities ........................225
specifications ..................226, 228
Exhaust fumes ..........................127
F
Fail safe cooling ........................195
Floor mats ...................................71
Fluid capacities .........................225
Fuel ............................................196
calculating fuel
economy ............................52, 201
cap ...........................................198
capacity ...................................225
choosing the right fuel ...........199
comparisons with EPA fuel
economy estimates .................204
detergent in fuel .....................200
filling your vehicle
with fuel ..................196, 198, 201
filter, specifications ........201, 224
fuel pump shut-off switch .....145
improving fuel economy ........201
octane rating ...................200, 228
quality ......................................200
running out of fuel .................200
safety information relating to
automotive fuels .....................196
Fuses ..................................146–147
G
Garage Door Opener
(see Homelink wireless control
system) ........................................63
Gas cap (see Fuel cap) ............198
Gas mileage
(see Fuel economy) .................201
Gauges .........................................15H
Hazard flashers .........................145
Head restraints ...........................86
Headlamps ...................................36
aiming ........................................38
autolamp system .......................36
bulb specifications ....................40
daytime running lights .............36
flash to pass ..............................37
high beam .................................37
replacing bulbs .........................41
turning on and off ....................36
Heating
heating and air conditioning
system .................................32–33
HomeLink universal
transceiver (see
Garage door opener) ............53, 66
Homelink wireless control
system ..........................................63
Hood ..........................................182
I
Ignition ...............................123, 228
Infant seats
(see Safety seats) .....................114
Inspection/maintenance
(I/M) testing ..............................206
Instrument panel
cleaning ...................................178
cluster ........................................10
lighting up panel
and interior ...............................37
J
Jack ............................................153
Index
237