Page 169 of 248
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
107 — Not used
108 — Not used
109 – Not used
110 – Not used
111 – Not used
112 50A** Ignition switch
113 50A** Feeds IP fuses 3, 5, 21, 23, 25, 27
114 30A** VAP Steering, Air suspension compressor,
Instrument cluster
115 50A** Ignition switch
116 30A** Wipers
117 – Not used
118 20A** ABS
201 1/2 ISO Horn relay
202 1/2 ISO PCM relay
203 1/2 ISO Fuel pump relay
204 1/2 ISO A/C clutch relay
205 1/2 ISO Traction control switch relay
206 — Not used
207 1/2 ISO Fog lamp relay (Marauder only)
208 1/2 ISO Moonroof relay
209 — Not used
301 Full ISO Blower motor relay
302 Full ISO Starter solenoid relay
303 Full ISO Air suspension relay
304 Full ISO Heated backlight relay
401 — Not used
501 Diode PCM diode
502 — Not used
503 — Not used
601 — Not used
2003 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Roadside Emergencies
169
Page 190 of 248

WASHING THE EXTERIOR
Wash your vehicle regularly with cool or lukewarm water and a neutral
Ph shampoo, such as Motorcraft Detail Wash (ZC-3–A), which is available
from your dealer.
•Never use strong household detergents or soap, such as dish washing
or laundry liquid. These products can discolor and spot painted
surfaces.
•Never wash a vehicle that is “hot to the touch” or during exposure to
strong, direct sunlight.
•Always use a clean sponge or carwash mitt with plenty of water for
best results.
•Dry the vehicle with a chamois or soft terry cloth towel in order to
eliminate water spotting.
•It is especially important to wash the vehicle regularly during the
winter months, as dirt and road salt are difficult to remove and cause
damage to the vehicle.
•Immediately remove items such as gasoline, diesel fuel, bird droppings
and insect deposits because they can cause damage to the vehicle’s
paintwork and trim over time.
•Remove any exterior accessories, such as antennas, before entering a
car wash.
•Suntan lotions and insect repellents can damage any painted
surface; if these substances come in contact with your vehicle,
wash off as soon as possible.
WAXING
Applying a polymer paint sealant to your vehicle every six months will
assist in reducing minor scratches and paint damage.
•Wash the vehicle first.
•Do not use waxes that contain abrasives.
•Do not allow paint sealant to come in contact with any non-body
(low-gloss black) colored trim, such as grained door handles, roof
racks, bumpers, side moldings, mirror housings or the windshield cowl
area. The paint sealant will “gray” or stain the parts over time.
PAINT CHIPS
Your dealer has touch-up paint and sprays to match your vehicle’s color.
Take your color code (printed on a sticker in the driver’s door jam) to
your dealer to ensure you get the correct color.
2003 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Cleaning
Cleaning
190
Page 241 of 248

Heating
heating and air conditioning
system .................................46, 48
HomeLink universal
transceiver (see Garage
door opener) ...................70, 82, 85
Hood ..........................................197
I
Ignition ...............................142, 231
Infant seats
(see Safety seats) .....................134
Inspection/maintenance (I/M)
testing ........................................219
Instrument panel
cleaning ...................................193
cluster ........................................10
lighting up panel and
interior .......................................54
J
Jack ............................................170
positioning ...............................170
storage .....................................170
Jump-starting your vehicle ......175
K
Keyless entry system .................99
autolock .....................................98
keypad .......................................99
programming entry code .......100
Keys .............................92, 101–103
key in ignition chime ...............16
positions of the ignition .........142L
Lamps
autolamp system .......................53
bulb replacement
specifications chart ..................57
cargo lamps ...............................54
daytime running light ...............53
headlamps .................................53
headlamps, flash to pass ..........54
instrument panel, dimming .....54
interior lamps .....................57–58
replacing bulbs ...................57–62
Lane change indicator
(see Turn signal) ........................56
Lights, warning and indicator ....10
air bag ........................................13
air suspension ...........................14
anti-lock brakes (ABS) ....12, 147
brake ..........................................12
charging system ........................13
check engine .............................10
fuel cap light .............................11
high beam .................................15
low fuel ......................................14
oil pressure ...............................13
overdrive off ..............................14
safety belt .................................13
speed control ............................80
traction control active ..............13
turn signal indicator .................14
Limited slip axle
(see Traction Loc) ....................155
Load limits .................................156
GAWR ......................................156
GVWR ......................................156
trailer towing ..........................156
Locks
autolock .....................................98
childproof ..................................93
doors ..........................................92
2003 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Index
241
Page 242 of 248

Lubricant specifications ...230–231
Lumbar support, seats .............107
M
Message center ...........................86
reset button ..............................86
select button .............................87
Mirrors
automatic dimming rearview
mirror ........................................76
fold away ...................................76
heated ........................................75
side view mirrors (power) .......75
Moon roof ....................................81
Motorcraft parts ................214, 228
O
Octane rating ............................213
Odometer .....................................20
Oil (see Engine oil) ..................198
Overdrive .............................89, 153
P
Panic alarm feature, remote
entry system ................................96
Parking brake ............................148
Parts (see Motorcraft parts) ....228
Passenger Occupant
Classification Sensor .................111
Pedals (see Power adjustable
foot pedals) .................................76
Power adjustable foot pedals .....76
Power distribution box
(see Fuses) ...............................167
Power door locks ..................92, 98Power mirrors .............................75
Power point .................................73
Power steering ..................150–151
fluid, checking and adding ....219
fluid, refill capacity ................228
fluid, specifications .................230
Power Windows ...........................74
R
Radio ............................................22
Radio reception .....................44–45
Rear window defroster ...............52
Relays ................................163, 170
Remote entry system ...........94, 96
illuminated entry ......................98
locking/unlocking doors ...........95
opening the trunk .....................96
panic alarm ...............................96
replacement/additional
transmitters ...............................97
replacing the batteries .............96
Roadside assistance ..................161
S
Safety Belt Maintenance ..........123
Safety belts (see Safety
restraints) ............16, 109, 113–117
Safety defects, reporting ..........189
Safety restraints ........109, 113–117
belt minder .............................119
extension assembly ................123
for adults .........................114–116
for children .............................131
lap belt ....................................117
Occupant Classification
Sensor ......................................111
2003 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Index
242