Mercury Mountaineer (2002-2005) fuses and relays

 

Fuse Layout Mercury Mountaineer 2002-2005

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Passenger Compartment Fuse Box

Fuse box location

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

Fuse box diagram

 

Assignment of the fuses in the passenger compartment

№	Amp	Description
1	30A	2002: Radio Sense, 4x4, 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,4x4 module 2003: 4x4 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.

№	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.

Fuse box diagram (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*	4x4 (v-batt 2)
18	20A*	4x4 (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)

 

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: 4x4 (v-batt 2) 2004-2005: Not used
18	20A*	2004: 4x4 (v-batt 1) 2004-2005: PCM with two-speed 4x4 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

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