fuse box location Mercury Grand Marquis 2008 Owner's Manuals

Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle’s main electrical systems from overloads.
Always disconnect the battery before servicing high current
fuses.
To reduce risk of electrical shock, always replace the cover to
the Power Distribution Box before reconnecting the battery or
refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and Specificationschapter.
The high-current fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
1 30A* Ignition switch
2 20A* Moon roof
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
198

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
3 10A* Powertrain Control Module (PCM) keep
alive power, Canister vent
4 20A* Fuel relay feed
5 10A* Rear Air Suspension Module (RASM),
VAPS
6 15A* Alternator regulator
7 30A* PCM relay feed
8 20A* Driver’s Door Module (DDM)
9 15A* Ignition coil relay feed
10 20A* Horn relay feed
11 15A* A/C clutch relay feed
12 20A* Audio (Subwoofer)
13 20A* Instrument panel power point
14 20A* Stop lamp switch
15 15A* Foglamps
16 20A* Heated seats
17 — Not used
18 — Not used
19 15A* Injectors
20 15A* PCM
21 15A* Powertrain loads and sensors
22 — Not used
23 — Not used
24 10A* Heated mirror, Rear defrost indicator
101 40A** Blower relay feed
102 50A** Cooling fan
103 50A** Instrument panel (I/P) fuse box feed #1
(I/P fuses 10, 12, 14, 16 and 18)
104 50A** Instrument panel (I/P) fuse box feed #2
(I/P fuses 2, 4, 6, 8, 19, 21, 23 and 25)
105 30A** Starter relay feed
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
199

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
106 40A** Anti-lock Brake System (ABS) module
(Pump)
107 40A** Rear defroster relay feed
108 — Not used
109 20A** ABS module (Valves)
110 30A** Wiper module
111 — Not used
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
12ISO relay Foglamps
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 Rear defrost relay
501 Diode A/C clutch
502 Diode PCM
503 — Not used
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
200

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
201