Mercury Mountaineer (2002-2005) fuses and relays

 

In this article, we consider the second-generation Mercury Mountaineer, produced from 2002 to 2005. Here you will find fuse box diagrams of Mercury Mountaineer 2002, 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Mercury Mountaineer 2002-2005


Cigar lighter (power outlet) fuses in the Mercury Mountaineer are the fuse #24 (Cigar lighter) in the Instrument panel fuse box, and fuses #7 (Power Point #2), #9 (Power Point #1) in the Engine Compartment Fuse Box.


Passenger Compartment Fuse Box

Fuse box location

The fuse box is located under the instrument panel on the driver’s side.The location of the fuses in the passenger compartment: Mercury Mountaineer (2002-2005)

Fuse box diagram

Interior fuse box diagram: Mercury Mountaineer (2002, 2003, 2004, 2005)


 

Assignment of the fuses in the passenger compartment

Amp Description
1 30A 2002: Radio Sense, 4×4, ABS Control Module

2003-2005: Memory seat module, Driver power seat, Driver power lumbar

2 20A 2002: Folding Mirror, Moon Roof, Heated Seats, Moon roof

2003-2005: Heated seats (2003), Moonroof

3 20A Radio, Amplifier, DVT, Power Antenna (2002)
4 5A 2002: Digital Transmission Range Sensor
2003-2005: Front wiper module
5 15A Flasher relay (Turn, hazards)
6 10A 2002-2003: Right horn
2004-2005: Key-in-chime
7 15A Heated mirrors
8 5A 2002: Washer Pump Relays (Front and Rear), Front Wiper Control
2003-2005: Heated PCV (4.0L engine only)
9 15A 2002: Rear Wiper Coil and Contact
2003-2005: Not used
10 10A 2002-2003: Heated backlight relay coil, Heated seat module, A/C clutch contact, Temp Blend Actuator (2002)

2004-2005: Heated backlight relay coil, A/C clutch contact

11 20A 2002-2003: Not used (spare)
2004-2005: Heated seats
12 5A 2002: Foglamp Switch,4×4 module
2003: 4×4 module
2004-2005: Not used
13 5A 2002: Over Drive Cancel Switch, GEM Start, Flex Fuel Sender
2003-2005: Overdrive cancel switch
14 5A PATS
15 5A 2002: 4 x 4, Memory Seat Disable
2003-2005: Rear wiper module, Cluster, TPMS (2003)
16 5A 2002: Power Mirror, Security Module (turn), Manual Climate Control
2003-2005: Power mirror, Manual climate control, TPMS
17 15A Delayed accessory relay coil/Battery saver coil and contact/Reading and glove box lamps
18 10A 2002-2003: Left horn
2004-2005: Flexible fuel pump
19 10A 2002: Not Used
2003-2005: Restraint Control Module (RCM)
20 5A 2002: Memory Module, GEM Module

2003: Driver seat switch, Memory switch, Driver seat module, BSM, Sunload sensor

2004-2005: Memory driver seat switch, Driver seat module, Body Security Module (BSM), PATS LED

21 5A Instrument cluster, Compass, Flasher coil
22 10A 2002: Not Used
2003-2005: ABS, IVD Controller
23 15A 2002: Brake Pedal Position Switch
2003: Brake pedal position switch, Driver brake applied relay, Redundant cruise deactivate switch
2004-2005: Not used
24 15A Cigar lighter, OBD II
25 5A Mode-Temperature actuator for auxiliary climate control, Trailer tow battery charge relay coil, TPMS (2004-2005)
26 7.5A Reverse park aid, Brake shift interlock, Approach lamp relay coil (2003) IVD switch
27 7.5A 2002: Electronic Compass Mirror, Security Module, Digital Transmission Range Sensor – Backup Lamps
2003-2005: Automatic dimming mirror, Digital transmission range sensor, Backup lamps
28 5A 2002: Air Bag Diagnostics
2003-2005: Radio (Start)/DVD (Start)
29 5A/10A 2002: 4 x 4, GEM Module signal, ABS Control Module, Moon Roof
2003-2005: Digital transmission range sensor, PWR feed to fuse #28 (Start feed)
30 5A Daytime Running Lamps (DRL), DEATC climate controller, Manual climate control, Manual climate control temp blend actuator

Top side

These relays are located on the reverse side of the passenger compartment fuse panel.
To access the relays you must remove the passenger compartment fuse panel.

Passenger compartment fuse panel (top side): Mercury Mountaineer (2002, 2003, 2004, 2005)

Relays
1 Flasher
2 Rear defrost
3 Delayed accessory
4 Front Washer Pump (2002)
5 Battery saver
6 Rear Washer Pump (2002)
7 Interior Lamps (2002)

Engine Compartment Fuse Box

Fuse box location

The Power distribution box is located in the engine compartment (on the driver’s side), under the cover.The location of the fuses in the engine compartment: Mercury Mountaineer (2002-2005)

Fuse box diagram (2002)

Under-hood fuse box diagram: Mercury Mountaineer (2002)

 

Assignment of the fuses and relays in the engine compartment (2002)

Amp Rating Description
1 60A** PJB
2 20A** Door Locks
3 20A** GCC Pusher Fan (export only)
4 30A** Heated Backlight
5 40A** ABS
6 60A** Circuit Breaker
7 20A** Power Point #2
8 Not Used
9 20A** Power Point #1
10 20A** ABS Module
11 40A** PTEC
12 50A** Ignition Relay
13 30A** Trailer Tow Battery
14 10 A* Fog Lamps
15 5A* Memory
16 15 A* Headlamp Switch
17 20A* 4×4 (v-batt 2)
18 20A* 4×4 (v-batt 1)
19 20A** High Beam Relay
20 30A** Electric Brake
21 Not Used
22 20A** Autolmap; Low Beam
23 30A** Ignition Switch
24 10 A* Rear Fog Lamps
25 20A* Security Module (horns)
26 15A* Fuel Pump
27 20A* Trailer Tow Lamps
28 10 A* Daytime Running Lamps (DRL)
29 60A** PJB
30 Not Used
31 Not Used
32 Not Used
33 30A** Auxiliary Blow er Motor
34 30A** Power Seats
35 Not Used
36 40A** Blower Motor
37 15A* A/C Clutch
38 15 A* Coil On Plug
39 15 A* High Beam
40 15 A* PTEC Power
41 15 A* HEGO, UMV, CMS, PTEC
42 10 A* Right Low Beam
43 10 A* Left Low Beam
44 10 A* High Beam Relay
45 7.5A* Right High Beam (export only)
46 15 A* Injectors
47 Daytime Running Lamps Relay, GCC Pusher Fan (export)
48 Fuel Pump Relay
49 High Beam Relay
50 Fog Lamp Relay
51 Autolamp Relay
52 A/C Clutch Relay
53 Park Lamp Relay (export)
54 Wiper Rim / Park Relay
55 Blower Motor Relay
56 Starter Relay
57 PTEC Relay
58 Ignition Relay
59 Wiper High/Low Relay
60 PCM Diode
61 A/C Clutch Diode
67 30A CB Delayed accessory
* Mini Fuses
** Maxi Cartridge Fuses

Fuse box diagram (2003-2005)

Under-hood fuse box diagram: Mercury Mountaineer (2003, 2004, 2005)

 

Assignment of the fuses and relays in the engine compartment (2003, 2004, 2005)

Amp Description
1 60A** PJB #1
2 30A** BSM
3 Not used
4 30A** Rear defrost
5 40A** Anti-lock Brake System (ABS) pump
6 60A** Delayed accessory, Power windows, Audio
7 20A** Power point #2
8 Not used
9 20A** Power point #1
10 30A** ABS module (valves)
11 40A** Powertrain Control Module (PCM)
12 50 A** Ignition relay, Starter relay
13 40A** Trailer tow battery charge, Trailer tow turn signals
14 10A* 2003-2004: Daytime Running Lamps (DRL) (Canada)
2005: Not used
15 15A* Memory (PCM/DEATC/Cluster), Courtesy lamps
16 15A* Park lamps, Autolamp parklamps, Front foglamps relay coil
17 20 2003: 4×4 (v-batt 2)
2004-2005: Not used
18 20A* 2004: 4×4 (v-batt 1)
2004-2005: PCM with two-speed 4×4 clutch
19 20A** High beam relay
20 30A** Trailer electric brake module
21 30A** Front wiper motor
22 20A** Low beam, Autolamp
23 30A** Ignition switch, PCM diode
24 Not used
25 15A* 2003: Not Used
2004-2005: Brake on-off
26 20A* Fuel pump
27 20A* Trailer tow- park lamps, Trailer tow- back-up
28 20A* Horn relay
29 60A** PJB #2
30 20A** Rear wiper motor
31 Not used
32 Not used
33 30A** Auxiliary blower motor
34 30A** Passenger power seat, Adjustable pedals (non-memory)
35 Not used
36 40A** Blower motor
37 15A* A/C clutch relay, Transmission
38 15A* 2003: Coil on plug
2004-2005: HEGO, VMV, CMS, ESM, CVS
39 15A* Injectors, Fuel pump relay coil
40 15A* 2003: PTEC power
2004-2005: PCM power
41 15A* 2003-2004: HEGO, VMV, CMS, PCM diode, ESM, CVS

2005: Coil on plug (4.6L engine only), Ignition coil (4.0L engine only)

42 10 A* Right low beam
43 10 A* Left low- beam
44 15A* Front foglamps
45 2A* 2003: Brake pressure switch (ABS)
2004-2005: Brake pressure switch (non-AdvanceTrac vehicles)
46 20A* High beams
47 Horn relay
48 Fuel pump relay
49 High beam relay
50 Front fog lamps relay
51 2003: DRL relay (Canada)/AdvanceTrac relay (U.S.)
2004-2005: DRL relay (Canada)
52 A/C clutch relay
53 Trailer tow right turn relay
54 Trailer tow left turn relay
55 Blower motor relay
56 Starter relay
57 2003: PTEC relay
2004-2005: PCM relay
58 Ignition relay
59 2003: Driver brake applied relay (vehicles equipped with AdvanceTrac only)
2004-2005: Not used
60 PCM diode
61 A/C clutch diode
62 30A CB Power windows circuit breaker
* Mini Fuses
** Cartridge Fuses

Rear Relay Box

The relay box is located on the rear passenger side quarter trim panel.

Rear Relay Box: Mercury Mountaineer (2002, 2003, 2004, 2005)

Rear Relay Box

Relay Location Description
14 2002: Rear fog lamps (export)
2003-2005: Not used
15 Trailer Tow back up lamps
16 Not Used
17 2002-2003: Rear Wipers
2004-2005: Not Used
18 2002: Trailer Tow Stop EAO
2003-2005: Not Used
19 Trailer Tow Park Lamps
20 Trailer Tow Battery Charge
21 Not Used
22 2002-2003: Approach Lamps
2004-2005: Not Used
23 Not Used
Diode 3 Not Used
Diode 4 Not Used


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