2005 Mercury Grand Marquis ignition

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
112 30A** Air suspension compressor
113 — Not used
114 — Not used
115 — Not used
116 — Not used
117 — Not used
118 — Not used
201
12ISO relay A/C clutch
202 — Not used
203
12ISO relay Ignition coil
204
12ISO relay PCM
205 — Not used
206
12ISO relay Fuel
207 — Not used
208 — Not used
209
12ISO relay Horn
301 Full ISO relay Starter
302 Full ISO relay Air compressor
303 Full ISO relay Blower
304 Full ISO relay Power windows relay (RUN/ACC)
501 Diode A/C clutch
502 Diode PCM
503 Diode Horn, Door latch
601 20A Circuit
breakerPower seats, Lumbar, Decklid
602 20A Circuit
breakerPower windows relay feed
(RUN/ACC)
* Mini fuse ** Cartridge fuse
Relays
Relays are located in the power distribution box and should be replaced
by qualified technicians.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
189

If you have run out of fuel:
•You may need to cycle the ignition from OFF to ON several times after
refueling, to allow the fuel system to pump the fuel from the tank to
the engine.
•Your “Check Engine” indicator may come on. For more information on
the “Check Engine” indicator, refer to theInstrument Cluster
chapter.
Fuel Filter
For fuel filter replacement, see your dealer or a qualified service
technician. Refer toscheduled maintenance informationfor the
appropriate intervals for changing the fuel filter.
Replace the fuel filter with an authorized Motorcraft part. The
customer warranty may be void for any damage to the fuel system
if an authorized Motorcraft fuel filter is not used.
ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend taking
fuel economy measurements during the first 1,000 miles (1,600 km) of
driving (engine break-in period). You will get a more accurate
measurement after 2,000 miles-3,000 miles (3,000 km–5,000 km).
Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theRefill capacities
section of this chapter.
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
amount of fuel in a full tank and a tank when the fuel gauge indicates
empty. Empty reserve is the small amount of fuel remaining in the fuel
tank after the fuel gauge indicates empty.
The amount of usable fuel in the empty reserve varies and should
not be relied upon to increase driving range. When refueling your
vehicle after the fuel gauge indicates empty, you might not be
able to refuel the full amount of the advertised capacity of the
fuel tank due to the empty reserve still present in the tank.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
230

For consistent results when filling the fuel tank:
•Turn the engine/ignition switch to the off position prior to refueling,
an error in the reading will result if the engine is left running.
•Use the same filling rate setting (low — medium — high) each time
the tank is filled.
•Allow no more than two automatic click-offs when filling.
•Always use fuel with the recommended octane rating.
•Use a known quality gasoline, preferably a national brand.
•Use the same side of the same pump and have the vehicle facing the
same direction each time you fill up.
•Have the vehicle loading and distribution the same every time.
Your results will be most accurate if your filling method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading
(in miles or kilometers).
2. Each time you fill the tank, record the amount of fuel added (in
gallons or liters).
3. After at least three to five tank fill-ups, fill the fuel tank and record
the current odometer reading.
4. Subtract your initial odometer reading from the current odometer
reading.
5. Follow one of the simple calculations in order to determine fuel
economy:
Calculation 1:Divide total miles traveled by total gallons used.
Calculation 2:Multiply liters used by 100, then divide by total
kilometers traveled.
Keep a record for at least one month and record the type of driving (city
or highway). This will provide an accurate estimate of the vehicle’s fuel
economy under current driving conditions. Additionally, keeping records
during summer and winter will show how temperature impacts fuel
economy. In general, lower temperatures give lower fuel economy.
Driving style — good driving and fuel economy habits
Give consideration to the lists that follow and you may be able to change
a number of variables and improve your fuel economy.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
231

•Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
•Using fuel blended with alcohol may lower fuel economy.
•Fuel economy may decrease with lower temperatures during the first
8–10 miles (12–16 km) of driving.
•Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
•Close windows for high speed driving.
EPA window sticker
Every new vehicle should have the EPA window sticker. Contact your
dealer if the window sticker is not supplied with your vehicle. The EPA
window sticker should be your guide for the fuel economy comparisons
with other vehicles.
It is important to note the box in the lower left corner of the window
sticker. These numbers represent the Range of MPG (L/100 km)
expected on the vehicle under optimum conditions. Your fuel economy
may vary depending upon the method of operation and conditions.
EMISSION CONTROL SYSTEM
Your vehicle is equipped with various emission control components and a
catalytic converter which will enable your vehicle to comply with
applicable exhaust emission standards. To make sure that the catalytic
converter and other emission control components continue to work
properly:
•Use only the specified fuel listed.
•Avoid running out of fuel.
•Do not turn off the ignition while your vehicle is moving, especially at
high speeds.
•Have the items listed inscheduled maintenance information
performed according to the specified schedule.
The scheduled maintenance items listed inscheduled maintenance
informationare essential to the life and performance of your vehicle
and to its emissions system.
If other than Ford, Motorcraft or Ford-authorized parts are used for
maintenance replacements or for service of components affecting
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
233

ENGINE DATA
Engine 4.6L V8 engine
Cubic inches 281
Required fuel 87 octane
Firing order 1-3-7-2-6-5-4-8
Ignition system Coil on plug
Spark plug gap 0.052–0.056 inch (1.32–1.42mm)
Compression ratio 9.4:1
VEHICLE DIMENSIONS (AT CURB MASS)
Vehicle dimensions Inches (mm)
(1) Overall length 211.9 (5382)
(2) Overall width 78.3 (1990)
(3) Overall height 58.4 (1483)
(4) Wheelbase 114.6 (2911)
(5) Track - Front 63.4 (1610)
(5) Track - Rear 65.6 (1666)
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
244

F
Fail safe cooling ........................224
Floor mats ...................................77
Fluid capacities .........................241
Fuel ............................................225
calculating fuel
economy ............................55, 230
cap ...........................................227
capacity ...................................241
choosing the right fuel ...........228
comparisons with EPA fuel
economy estimates .................233
detergent in fuel .....................229
filling your vehicle with
fuel ...........................225, 227, 230
filter, specifications ........230, 240
fuel pump shut-off switch .....181
improving fuel economy ........230
octane rating ...................229, 244
quality ......................................229
running out of fuel .................229
safety information relating to
automotive fuels .....................225
Fuses ..................................182–183
G
Garage Door Opener (see
Homelink wireless control
system) ........................................68
Gas cap (see Fuel cap) ............227
Gas mileage (see Fuel
economy) ...................................230
Gauges .........................................15
H
Hazard flashers .........................181
Head restraints ...........................91Headlamps ...................................38
aiming ........................................40
autolamp system .......................38
bulb specifications ....................43
daytime running lights .............38
flash to pass ..............................39
high beam .................................39
replacing bulbs .........................44
turning on and off ....................38
Heating
heating and air conditioning
system .................................34–35
Homelink wireless control
system ..........................................68
Hood ..........................................212
I
Ignition ...............................163, 244
Infant seats (see Safety seats) 124
Inspection/maintenance (I/M)
testing ........................................235
Instrument panel
cleaning ...................................208
cluster ........................................10
lighting up panel and interior .39
J
Jack ............................................137
positioning ...............................137
storage .....................................137
Jump-starting your vehicle ......190
K
Keyless entry system .................86
autolock .....................................85
keypad .......................................86
programming entry code .........86
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Index
252

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