2008 Mercury Grand Marquis brake light

If you use a rental trailer, follow the instructions that the rental agency
gives to you.
Do not attach safety chains to the bumper.
Trailer brakes
Electric brakes and manual, automatic or surge-type trailer brakes are
safe if installed properly and adjusted to the manufacturer’s
specifications. The trailer brakes must meet local and Federal
regulations.
Do not connect a trailer’s hydraulic brake system directly to your
vehicle’s brake system. Your vehicle may not have enough
braking power and your chances of having a collision greatly increase.
The braking system of the tow vehicle is rated for operation at the
GVWR not GCWR.
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
authorized dealer or trailer rental agency for proper instructions and
equipment for hooking up trailer lamps.
Driving while you tow
When towing a trailer:
•Keep your speed no faster than 70 mph (112 km/h) during the first
500 miles (800 km) of towing a trailer, and don’t make full throttle
starts.
•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.
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Tires, Wheels and Loading
170

Refer toBrake system warning
lightin theInstrument Cluster
chapter for information on the brake
system warning light.
If you are driving down a long or steep hill, shift to a lower gear.
Do not apply your brakes continuously, as they may overheat
and become less effective.
Under normal operating conditions, brake dust may accumulate on the
wheels. Some brake dust is inevitable as brakes wear and does not
contribute to brake noise. The use of modern friction materials with
emphasis on improved performance and environmental considerations
can lead to more dust than in the past. Brake dust can be cleaned by
weekly washing with soapy water and a soft sponge. Heavier deposits can
be removed with Motorcraft Wheel and Tire Cleaner (ZC-37–A).
Anti-lock brake system (ABS)
This vehicle is equipped with an anti-lock braking system (ABS). A noise
from the hydraulic pump motor and pulsation in the pedal may be
observed during ABS braking events. Pedal pulsation coupled with noise
while braking under panic conditions or on loose gravel, bumps, wet or
snowy roads is normal and indicates proper functioning of the vehicle’s
anti-lock brake system. If the vehicle has continuous vibration or shudder
in the steering wheel while braking, the vehicle should be inspected by
an authorized dealer.
The ABS operates by detecting the
onset of wheel lockup during brake
applications and compensates for
this tendency. The wheels are
prevented from locking even when
the brakes are firmly applied. The
accompanying illustration depicts
the advantage of an ABS equipped
vehicle (on bottom) to a non-ABS
equipped vehicle (on top) during hard braking with loss of front braking
traction.
P!
BRAKE
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
179

Using ABS
•In an emergency or when maximum efficiency from the four-wheel
ABS is required, apply continuous force on the brake. The four wheel
ABS will be activated immediately, thus allowing you to retain steering
control of your vehicle and, providing there is sufficient space, will
enable you to avoid obstacles and bring the vehicle to a controlled
stop.
•The anti-lock system does not reduce stopping distance. Always leave
enough room between your vehicle and the vehicle in front of you to
stop.
•We recommend that you familiarize yourself with this braking
technique. However, avoid taking any unnecessary risks.
ABS warning lamp
The ABS warning lamp in the
instrument cluster momentarily
illuminates when the ignition is
turned on. If the light does not
illuminate momentarily at start up,
remains on or continues to flash, the ABS needs to be serviced.
With the ABS light on, the anti-lock
brake system is disabled and normal
braking is still effective unless the
brake warning light also remains
illuminated with parking brake
released. (If your brake warning lamp illuminates, have your vehicle
serviced immediately.)
Parking brake with auto-release (if equipped)
Apply the parking brake whenever
the vehicle is parked.
To set the parking brake:
1. Move the gearshift to P (Park).
2. Push pedal downward.
ABS
P!
BRAKE
HOOD
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
180

N (Neutral)
With the gearshift lever in N (Neutral), the vehicle can be started and is
free to roll. Hold the brake pedal down while in this position.
(Overdrive)
The normal driving position for the
best fuel economy. Transmission
operates in gears one through four.
If your vehicle is equipped with a
column-shift transmission, overdrive
can be deactivated by pressing the
transmission control switch on the
gearshift lever.
If your vehicle is equipped with a
floor-shift transmission, overdrive
can be deactivated by pressing the
transmission control switch on the
gearshift handle.
The transmission control indicator
light (TCIL) will illuminate on the
instrument cluster.
Drive (not shown)
Drive is activated when the transmission control switch is pressed.
•This position allows for all forward gears except overdrive.
•O/D OFF lamp is illuminated.
•Provides engine braking.
•Use when driving conditions cause excessive shifting from O/D to
other gears. Examples: city traffic, hilly terrain, heavy loads, trailer
towing and when engine braking is required.
•To return to O/D (overdrive mode), press the transmission control
switch. The O/D OFF lamp will not be illuminated.
O/D
OFF
O/D
OFF
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
188

DRIVING THROUGH WATER
If driving through deep or standing
water is unavoidable, proceed very
slowly especially when the depth is
not known. Never drive through
water that is higher than the bottom
of the wheel rims (for cars) or the
bottom of the hubs (for trucks).
When driving through water, traction or brake capability may be limited.
Also, water may enter your engine’s air intake and severely damage your
engine or your vehicle may stall.Driving through deep water where
the transmission vent tube is submerged may allow water into the
transmission and cause internal transmission damage.
Once through the water, always dry the brakes by moving your
vehicle slowly while applying light pressure on the brake pedal.
Wet brakes do not stop the vehicle as quickly as dry brakes.
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
190

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
1 10A Ignition (START) - Starter relay coil,
DTRS
2 7.5A Power mirrors, Door lock switches,
Mirror switch, Keypad switch, Decklid
switch, Adjustable pedal switch, DDM,
Cluster
3 5A Ignition (START) - Audio mute
4 10A LCM (switch illumination), Autolamp
sensor
5 7.5A Ignition (ON/ACC) - LCM
6 7.5A LCM
7 10A Ignition (ON/ACC) - Wiper module
8 10A Electronic Automatic Temperature
Control (EATC) module (vehicles
equipped with EATC only)
9 7.5A Ignition (ON/ACC) - Door lock switch
illumination, Heated seat switch
illumination, Moon roof, Overhead
console, Radio, Antenna,
Electrochromatic mirror, Window relay
coil
10 15A Hazards
11 15A Ignition (ON) - Turn signals
12 15A Audio
13 10A Ignition (ON) - Anti-lock Brake System
(ABS) module, Rear Air Suspension
Module (RASM), Variable Assist Power
Steering (VAPS), Cluster
14 15A Adjustable pedals
15 10A Ignition (ON) - EATC module, A/C mode
switch (vehicles equipped with manual
A/C only), A/C blower relay coil
16 20A Cigar lighter, OBD II
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
196

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
17 10A Ignition (ON) - A/C mode switch
(vehicles equipped with manual A/C),
Blend door, Heated seat modules, BTSI
(Floor-shift transmission)
18 15A Lighting control module (interior
lighting)
19 10A LCM (Left-hand low beam)
20 10A Ignition (ON/START) - Back-up lamps
21 10A LCM (Right-hand low beam)
22 10A Ignition (ON/START) - Restraint Control
Module (RCM), Occupant Classification
Sensor (OCS), Passenger Air bag
Deactivation Indicator (PADI)
23 15A Multi-function switch (Flash-to-pass),
LCM (High beams)
24 10A Ignition (ON/START) - Passive
Anti-Theft System (PATS) module,
Powertrain Control Module (PCM) relay
coil, Fuel relay coil, Ignition coil relay
coil
25 15A LCM (Park lamps, corner lamps, license
lamps)
26 10A Ignition (ON/START) - Cluster, LCM,
Overdrive cancel switch
27 — Not used
28 7.5A Brake signal, LCM (BTSI), ABS
29 — Not used
30 — Not used
31 5A Key in (LCM)
32 — Not used
33 — Not used
Relay 1 Full ISO relay Window relay
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
197

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
601 20A Circuit
breakerPower seats, Lumbar
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 an authorized dealer.
CHANGING A FLAT TIRE
If you get a flat tire while driving:
•do not brake heavily.
•gradually decrease the vehicle’s speed.
•hold the steering wheel firmly.
•slowly move to a safe place on the side of the road.
Your vehicle may be equipped with a conventional spare tire that is
different in one or more of the following: type, brand, size, speed rating
and tread design. If this is the case, this dissimilar spare tire is still rated
for your vehicle loads (GAWR and GVWR). This temporary spare tire is
not equipped with a Tire Pressure Monitor System (TPMS) sensor.
Note:The tire pressure monitoring system (TPMS) indicator light will
illuminate when the spare is in use. To restore the full functionality of
the TPMS system, all road wheels equipped with the tire pressure
monitoring sensors must be mounted on the vehicle.
Have a flat tire serviced by an authorized dealer in order to prevent
damage to the TPMS sensor, refer toTire Pressure Monitoring System
(TPMS)in theTires, Wheels, and Loadingchapter. Replace the spare
tire with a road tire as soon as possible. During repairing or replacing of
the flat tire, have the authorized dealer inspect the TPMS sensor for
damage.
The use of tire sealants may damage your Tire Pressure
Monitoring System and should not be used.
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
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