1998 Mercury Grand Marquis fuel pump

Remember to turn the ignition OFF when refueling your vehicle.
Otherwise, the display will not show the addition of fuel for a few miles.
At least 9.5 liters (2.5 gallons) of fuel must be added for the fuel gauge
to immediately show the new fuel level.
The DTE function will flash for 5 seconds and sound a tone for 1 second
when you have approximately:
²80 km (50 miles) left before you run out of fuel
²40 km (25 miles)
²16 km (10 miles)
The message center will remain in
the DTE function until the SELECT
control is pressed to change
functions.
Displayed DTE will not be equal to
AVG ECON multiplied by the FUEL
REMAIN value. DTE is calculated
using a method that considers the
fuel economy of the last 800 km
(500 miles) driven.
If ªCOº or ªCSº is displayed, there is a problem with the fuel indication
system and you should contact your dealer for service as soon as
possible.
AVG ECON (average fuel economy)
Select this function to display your
average fuel economy in liters/100
km or miles/gallon.
If you calculate your average fuel
economy by dividing miles traveled by gallons used, your figure may be
different than displayed for the following reasons:
²your vehicle was not perfectly level during fill-up
²differences in the automatic shut-off points on the fuel pumps at
service stations
²variations in top-off procedure from one fill-up to another
²rounding of the displayed values to the nearest 0.1 liter (gallons)
RESET E/M SELECT
DIST TO
EMPTY
TRIP
AAVG
ECON
TRIP
BINST
ECON
AVG
SPEED
Instrumentation
19

HAZARD LIGHTS CONTROL
Use only in an emergency to warn traffic of vehicle breakdown,
approaching danger, etc. The hazard flashers can be operated when the
ignition is off.
²The hazard lights control is
located on top of the steering
column.
²Depress hazard lights control to
activate all hazard flashers
simultaneously.
²Depress control again to turn the
flashers off.
FUEL PUMP SHUT-OFF SWITCH
After a collision, if the engine cranks but does not start, the fuel pump
shut-off switch may have been activated. The shut-off switch is a device
intended to stop the electric fuel pump when your vehicle has been
involved in a substantial jolt.
1. Turn the ignition to the OFF position.
2. Check the fuel system for leaks.
3. If no fuel leak is apparent, reset the fuel pump shut-off switch by
pushing in the button on the switch.
4. Turn the ignition to the ON position. Pause for a few seconds and
return the key to the OFF position.
5. Make a further check for leaks in the fuel system.
Roadside emergencies
94

The fuel pump shut-off switch is
located on the left side of the trunk
behind the trunk liner.
FUSES AND RELAYS
Fuses
If electrical components in the
vehicle are not working, a fuse may
have blown. Blown fuses are
identified by a broken wire within
the fuse. Check the appropriate
fuses before replacing any electrical
components.
Always replace a fuse with one that has the specified amperage
rating. Using a fuse with a higher amperage rating can cause
severe wire damage and could start a fire.
1515
Roadside emergencies
95

The high-current fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingDescription
1 20A* Electric Fuel Pump Relay
2 30A* Generator, Starter Relay, Fuses 15 and 18
3 25A* Radio, CD Changer, Subwoofer Amplifier
4 Ð Not Used
5 15A* Horn Relay
6 20A* DRL Module
7 20A CB Power Door Locks, Power Seats, Trunk Lid
Release
8 30A** Air Suspension System
9 50A** See Fuses 5 and 9
10 50A** See Fuses 1, 2, 6, 7, 10, 11, 13 and Circuit
Breaker 14
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
17RELAY
1
RELAY
2
RELAY
3
RELAY
4
Roadside emergencies
99

Fuel quality
If you are experiencing starting, rough idle or hesitation driveability
problems during a cold start, try a different brand of ªRegularº unleaded
gasoline. ªPremiumº unleaded gasoline is not recommended (particularly
in the United States) because it may cause these problems to become
more pronounced. If the problems persist, see your dealer or a qualified
service technician.
The American Automobile Manufacturers Association (AAMA) issued a
fuel specification to provide information on high quality fuels that
optimize the performance of your vehicle. We recommend the use of
fuels that meet the AAMA specification if they are available.
It should not be necessary to add any aftermarket products to your fuel
tank if you continue to use a high-quality fuel.
Cleaner air
Ford approves the use of gasolines to improve air quality, including
reformulated gasolines that contain oxygenates up to 10% ethanol or
15% MTBE.
Do not use gasolines containing methanol, which can damage critical fuel
system components. Damage resulting from the use of methanol may not
be covered by your warranty.
Running out of fuel
Avoid running out fuel because this situation may have an adverse affect
on powertrain components.
If you have run out of fuel: You may need to crank the engine several
times before the system starts to pump fuel from the tank to the engine.
If you run out of fuel, your Check Engine light may come on. For more
information on the Check Engine light, refer to theInstrumentation
chapter.
Calculating fuel economy
To accurately calculate your vehicle's fuel economy:
1. Fill the tank completely and record the initial odometer reading.
2. Each time you fill the tank, record the amount of fuel added (in liters
or gallons).
3. After at least three to five fuel tank fill-ups, fill the fuel tank and
record the current mileage reading.
Maintenance and care
130

Aiming headlamps ....................135
Air bag supplemental
restraint system ..........................67
and child safety seats ..............68
description ................................67
disposal ......................................71
indicator light ...........................70
passenger air bag .....................69
Air conditioning
manual heating and air
conditioning system ............25,26
Air suspension
description ................................86
Anti-lock brake system
(ABS)#$description
Battery .......................................120
voltage gauge ............................16
Brake fluid
checking and adding ..............112
Brakes ..........................................82
anti-lock .....................................82
anti-lock brake system
(ABS) warning light .................83
fluid, checking and adding ....112
traction control .........................84
Brake-shift interlock ...................87
Break-in period .............................2
Bulbs, replacing ........................133
specifications ..........................136
Changing a tire .........................100
Child safety seats ........................72
Childproof locks ..........................48
Chime
headlamps on ............................11
Cleaning your vehicle ...............137
engine compartment .......138,139
exterior ....................................140
headlamps ...............................139
plastic parts ............................139
washing ....................................137
waxing .....................................137
wheels ......................................138windows ..................................141
wiper blades ............................139
Climate control system
automatic temperature
control ...................27,28,29,30,32
Clock ............................................33
Compass, electronic ....................43
calibration .................................44
set zone adjustment .................44
Coolant (see Engine coolant)
temperature gauge ...................15
Defrost
rear window ..............................24
Emission control system ..........131
Engine
service points ..........................109
Engine block heater ...................80
Engine coolant
checking and adding ..............114
disposal ....................................115
refill capacities ........................115
Engine oil ...........................110,111
changing oil and oil filter .......112
checking and adding .......110,111
Exhaust fumes ............................81
Floor mats ...................................49
Fuel
calculating fuel economy .......130
improving fuel economy ..........93
octane rating ...........................129
quality ......................................130
running out of fuel .................130
safety information relating
to automotive fuels ................127
Fuel pump shut-off switch .........94
Fuse panels
instrument panel ......................96
power distribution box .............98
Fuses .......................................95,96
Gauges, Mechanical ....................12
fuel gauge ..................................12
Hazard flashers ...........................94
Index
149