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Mercury Grand Marquis Fourth Generation (2002 - 2011) - fuse box diagram

avatar Jonathan Yarden Feb 11, 2021 · 5 min. read

In this article you will find a description of fuses and relays Mercury, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011

Passenger compartment fuse panel

Mercury Grand Marquis 4th Generation - fuse box - passenger compartment

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.

Fuse/relay Ampere rating [A] Description
1 15 Cluster, Lighting Control Module (Interior Lighting)
2 10 Ignition (ON) – Electronic Automatic Temperature Control (EATC) module, A/C mode switch (vehicles equipped with manual A/C only), A/C blower relay coil
3 10 EATC module
4 10 Ignition (ON) – Anti-lock Brake System (ABS) module, Rear Air Suspension Module (RASM), Variable Assist Power Steering (VAPS)
5 10 Speed control deactivation switch, Stop signal
6 10 Ignition (ON) – Cluster
7 15 LCM (Park lamps, Corner lamps)
8 10 LCM
9 10 LCM (Switch illumination)
10 5 Ignition (START) – Audio mute
11 10 Ignition (ON/ACC) – window relay coil
12 10 Ignition (START) – Starter relay coil, DTRS
13 10 Ignition (ON/ACC) – Wiper module
14 10 Ignition (ON) – BTSI (Floor-shift transmission)
15 7,5 Ignition (ON/ACC) – LCM, Door lock switch illumination, Heated seat switch illumination, Moonroof, Overhead console, Electrochromatic mirror
16 15 Ignition (ON) – Turn signals
17 10 Ignition (ON/ACC) – Audio
18 10 Ignition (ON) – A/C mode switch (vehicles equipped with manual A/C), Blend door, Heated seat modules
19 10 LCM (Left-hand low beam)
20 10 Ignition (ON/START) – Back-up lamps
21 10 LCM (Right-hand low beam)
22 10 Ignition (ON/START) – Restraint Control Module (RCM), Occupant Classification Sensor (OCS), Passenger Air bag Deactivation Indicator (PADI)
23 15 Multi-function switch (Flash-to-pass), LCM (High beams)
24 10 Ignition (ON/START) – Passive Anti-Theft System (PATS) module, Powertrain Control Module (PCM) relay coil, Fuel relay coil, Ignition coil relay coil
25 10 Autolamp/Sunload sensor, Power mirrors, Door lock switches, Mirror switch, Keypad switch, Decklid switch, Adjustable pedal switch, DDM
26 10 Ignition (ON/START) – Cluster, LCM, Overdrive cancel switch, Rear defroster relay coil
27 20 Cigar lighter, OBD II
28 7,5 Center High-Mounted Stop Lamp (CHMSL)
29 15 Audio
30 15 Stop lamps, MFS
31 15 Hazards
32 10 Mirror heaters, Rear defroster switch indicator
33 β€” Not used
Relay 1 Full ISO relay Rear defroster

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Power distribution box

Mercury Grand Marquis 4th Generation - fuse box - power distribution box

The power distribution box is located in the engine compartment.

Fuse/relay Ampere rating [A] Description
1 25* Ignition switch (Key in, RUN 1, RUN 2), Hazards
2 25* Ignition switch (RUN/START, RUN/ACC, START)
3 10* Powertrain Control Module (PCM) keep alive power
4 20* Fuel relay feed
5 10* Rear Air Suspension Module (RASM), VAPS
6 15* Alternator regulator
7 30* PCM relay feed
8 20* Driver’s Door Module (DDM)
9 15* Ignition coil relay feed
10 20* Horn relay feed
11 15* A/C clutch relay feed
12 25* Audio
13 20* Instrument panel power point
14 20* Stop lamp switch
15 20* Heated seats
16 15* Foglamps
17 β€” Not used
18 β€” Not used
19 15* Injectors
20 15* PCM, Mass Air Flow (MAF) sensor, IAT
21 15* Powertrain loads and sensors, A/C clutch relay coil
22 β€” Not used
23 β€” Not used
24 β€” Not used
101 40** Blower relay feed
102 50** Cooling fan
103 50** Instrument panel (I/P) fuse box feed #1 (I/P fuses 19, 21, 23, 25 and 27)
104 40** Instrument panel (I/P) fuse box feed #2 (I/P fuses 1, 3, 5, 7, 8 and 9)
105 30** Starter relay feed
106 40** Anti-lock Brake System (ABS) module (Pump)
107 40** Rear defroster relay feed
108 20** Moonroof
109 20** ABS module (Valves)
110 30** Wiper module
111 β€” Not used
112 30** Air suspension compressor
113 β€” Not used
114 β€” Not used
115 β€” Not used
116 β€” Not used
117 β€” Not used
118 β€” Not used
201 1⁄2 ISO relay A/C clutch
202 β€” Not used
203 1⁄2 ISO relay Ignition coil
204 1⁄2 ISO relay PCM
205 1⁄2 ISO relay Fog lamps
206 1⁄2 ISO relay Fuel
207 β€” Not used
208 β€” Not used
209 1⁄2 ISO 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 breaker Power seats, Lumbar
602 20A Circuit breaker Power windows relay feed (RUN/ACC)
* Mini fuse ** Cartridge fuse

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WARNING:Β Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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