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Mercury Mountaineer Second Generation (2002 - 2005) - fuse box diagram

avatar Jonathan Yarden Mar 27, 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

Passenger compartment fuse panel

Mercury Mountaineer Second Generation - fuse box - passenger compartment

The fuse panel is located below the instrument panel on the driver’s side.

Fuse Ampere rating [A] Description
1 30 Radio Sense, 4Γ—4, ABS Control Module
2 20 Folding Mirror, Moon Roof, Heated Seats, Moon roof
3 20 Radio, Amplifier, Power Antenna
4 5 Digital Transmission Range Sensor
5 15 Flasher Relay (Turn, Hazards)
6 10 Right Horn
7 15 Heated Mirrors
8 30 Washer Pump Relays (Front and Rear), Front Wiper Control
9 15 Rear Wiper Coil and Contact
10 10 Heated Backlight Relay Coil, Heated Seat Module, Temp Blend Actuator, A/C Clutch Contact
11 β€” Not used
12 5 Foglamp Switch,4Γ—4 module
13 5 Over Drive Cancel Switch, GEM Start, Flex Fuel Sender
14 5 PATS Module
15 5 4 x 4, Memory Seat Disable
16 5 Power Mirror, Security Module (turn), Manual Climate Control
17 15 Delayed Acc. Coil, Battery Saver, Interior Lamps
18 10 Left Horn
19 β€” Not used
20 5 Memory Module, GEM Module
21 5 Instrument Cluster, Compass, Flasher Coil
22 β€” Not used
23 15 Brake Pedal Position Switch
24 15 Cigar Lighter, OBD II
25 5 Mode, Temperature Actuator, Auxiliary Climate Control, Trailer Tow Battery Charge, Moon Roof
26 7,5 Park Aid, Brake Shift Interlock, Approach Lamp Relay Coil
27 7,5 Electronic Compass Mirror, Security Module, Digital Transmission Range Sensor – Backup Lamps
28 10 Air Bag Diagnostics
29 5 4 x 4, GEM Module signal, ABS Control Module, Moon Roof
30 5 Daytime Running Lamps (DRL), Remote Solenoid, DEATC Climate Controller

Β 

Passenger compartment fuse panel (top side)

Mercury Mountaineer Second Generation - fuse box - passenger compartment (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.

Relay Description
Relay 1 Flasher Relay
Relay 2 Rear Defrost
Relay 3 Delayed Accessory Relay
Relay 4 Front Washer Pump
Relay 5 Battery Saver
Relay 6 Rear Washer Pump
Relay 7 Interior Lamps

Power distribution box

Mercury Mountaineer Second Generation - fuse box - 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 overload

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

Rear Relay Box

Mercury Mountaineer Second Generation - fuse box - rear relay box

The relay box is located on the rear passenger side quarter trim panel. To access this box you must remove the trim panel.

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

Auxiliary relay box (trailer tow)

Mercury Mountaineer Second Generation - fuse box - auxiliary relay box

The relay box is located on the front right fender well underneath the speed control module.

Relay Description
Relay 64 Trailer Tow (left turn)
Relay 65 Trailer Tow (right turn)
Relay 66 Not used

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

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