2005 Mercury Grand Marquis fuse

The fuel pump shut-off switch is
located on the left side of the trunk
behind the left rear tail light and the
trunk liner.
Use the following procedure to reset the fuel pump shut-off switch.
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 on the reset button.
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.
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.
15
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
182

Note: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.
Standard fuse amperage rating and color
COLOR
Fuse
ratingMini
fusesStandard
fusesMaxi
fusesCartridge
maxi
fusesFuse link
cartridge
2A Grey Grey — — —
3A Violet Violet — — —
4A Pink Pink — — —
5A Tan Tan — — —
7.5A Brown Brown — — —
10A Red Red — — —
15A Blue Blue — — —
20A Yellow Yellow Yellow Blue Blue
25A Natural Natural — — —
30A Green Green Green Pink Pink
40A — — Orange Green Green
50A — — Red Red Red
60A — — Blue — Yellow
70A — — Tan — Brown
80A — — Natural — Black
Passenger compartment fuse panel
The fuse panel is located below and to the left of the steering wheel by
the brake pedal. Remove the panel cover to access the fuses.
To remove a fuse use the fuse puller tool provided on the fuse panel
cover.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
183

The fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
1 15A Cluster, Lighting Control Module
(Interior Lighting)
2 10A Ignition (ON) - Electronic
Automatic Temperature Control
(EATC) module, A/C mode switch
(vehicles equipped with EATC)
3 10A EATC module
4 10A Ignition (ON) - Anti-lock Brake
System (ABS) module, Positive
Crankcase Ventilation (PCV)
5 10A Speed control deactivation switch,
Stop signal, Brake-Transmission
Shift Interlock (BTSI)
(column-shift transmission)
6 10A Ignition (ON) - Cluster
7 10A LCM (Park lamps, Switch
illumination)
27 25
26 2423 21
2219
20
18 16
17 1514 12
1310
33
31
2932
30
28 11
97
8653
41
2Relay
1
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
184

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
8 10A Ignition (ON) - Rear Air
Suspension Module (RASM),
Variable Assist Power Steering
(VAPS)
9 20A LCM (Headlamps, Cornering
lamps)
10 5A Ignition (ON/START) - Driver’s
Door Module (DDM)
11 10A Ignition (START) - ON/ACC relay
coil
12 10A Ignition (ON/START) - Starter
relay coil
13 10A Ignition (START) - Wiper module
14 10A Ignition (ON) - BTSI (Floor-shift
transmission)
15 7.5A Ignition (START) - LCM, Door
lock switch illumination, Heated
seat switch illumination,
Moonroof, Overhead console,
Electrochromatic mirror
16 15A Ignition (ON) - Turn signals
17 10A Ignition (START) - Audio
18 10A Ignition (ON) - A/C mode switch
(vehicles equipped with manual
A/C), Blend door, DDM, Heated
seat modules, Daytime Running
Lamps (DRL) module
19 10A Left-hand low beam, DRL
20 10A Ignition (ON/ACC) - Back-up
lamps
21 10A Right-hand low beam, DRL
22 10A Ignition (ON/ACC) - Restraint
Control Module (RCM), Occupant
Classification Sensor (OCS),
Passenger Air bag Deactivation
Indicator (PADI)
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
185

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
23 15A Multi-function switch
(Flash-to-pass)
24 10A Ignition (ON/ACC) - Passive
Anti-Theft System (PATS)
module, Powertrain Control
Module (PCM) relay coil, Fuel
relay coil, Ignition coil relay coil
25 10A Autolamp/Sunload sensor, Power
mirrors, Door lock switches
(DDM), Adjustable pedal switch
26 10A Ignition (ON/ACC) - Analog
cluster, Warning lamp module,
LCM, Overdrive cancel switch,
Rear defroster relay coil
27 20A Cigar lighter, OBD II, Power point
28 10A Center High-Mounted Stop Lamp
(CHMSL)
29 15A Audio
30 15A Stop lamps, MFS
31 15A Hazards
32 10A Mirror heaters, Rear defroster
switch indicator
33 — Not used
Relay 1 Full ISO relay Rear defroster
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.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
186

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 20A* Ignition switch (Key in, RUN 1,
RUN 2)
2 25A* Ignition switch (RUN/START,
RUN/ACC, START)
3 10A* Powertrain Control Module (PCM)
keep alive power
4 20A* Fuel relay feed
5 10A* Rear Air Suspension Module
(RASM), VASM
6 15A* Alternator regulator
7 30A* PCM relay feed
8 20A* Driver’s Door Module (DDM),
Door locks
9 15A* Ignition coil relay feed
503
502
501
24
23
20
19 22
21302303304
301 207201 202203 204
209
206
208
205602118
114
110
106
102
117
113
109
105
101
116
112
108
104
115
111
107
103
18
16
14
1210
8
6
4
2
17
15
13
119
7
5
3
1 601
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
187

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
10 20A* Horn relay feed
11 15A* A/C clutch relay feed
12 25A* Audio
13 20A* Instrument panel power point
14 20A* Stop lamp switch
15 20A* Heated seats
16 20A* Daytime Running Lamps (DRL)
module
17 — Not used
18 — Not used
19 15A* Injectors
20 15A* PCM, Mass Air Flow (MAF)
sensor
21 15A* Powertrain loads and sensors
22 — Not used
23 — Not used
24 5A* Radio mute
101 40A** Blower relay feed
102 50A** Cooling fan
103 50A** Instrument panel (I/P) fuse box
feed #1 (I/P fuses 23, 25, 27 and
31)
104 40A** Instrument panel (I/P) fuse box
feed #2 (I/P fuses 1, 3, 5, 7 and 9)
105 30A** Starter relay feed
106 40A** Anti-lock Brake System (ABS)
module (Pump)
107 40A** Rear defroster relay feed
108 20A** Moonroof
109 20A** ABS module (Valves)
110 30A** Wiper module
111 — Not used
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
188

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