2003 Mercury Mountaineer Owner's Manuals

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
23 15A Brake pedal position switch
24 15A Cigar lighter, OBD II
25 5A Mode-Temperature actuator for
auxiliary climate control, Trailer
tow battery charge coil
26 7.5A Park aid, Brake shift interlock
27 7.5A Electrochromatic mirror, Digital
transmission range sensor -
backup lamps
28 5A Radio (Start)/DVD (Start)
29 10A Digital transmission range sensor,
PWR feed to fuse #28 (Start feed)
30 5A Daytime Running Lamps (DRL),
Remote solenoid, DEATC climate
controller, Manual climate control,
Manual climate control temp
blend actuator
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Passenger compartment fuse panel (top side)
These relays are located on the reverse side of the passenger
compartment fuse panel. See your dealer or a certified technician for
service of this relay box.
Fuse/Relay Location Description
Relay 1 Flasher relay
Relay 2 Rear defrost
Relay 3 Delayed accessory relay
Relay 4 Open
Relay 5 Battery saver
Relay 6 Open
Relay 7 Open
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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.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and specificationschapter.
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The high-current fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
1 60A** PJB
2 30A** BSM
3—Not used
4 30A** Rear defrost
5 40A** Anti-lock Brake System (ABS)
pump
6 60A** Delayed accessory
7 20A** Power point #2
8—Not used
9 20A** Power point #1
10 30A** ABS module (valves)
11 40A** PTEC
12 50A** Ignition relay, Starter relay
13 40A** Trailer tow battery, Trailer tow
turn signals
14 10A* Daytime Running Lamps (DRL)
(Canada)
15 15A* Memory (PCM/DEATC/Cluster),
Interior lights
16 15A* Headlamp switch, Foglamp switch
17—Not used
18—Not used
19 20A** High beam relay
20 30A** Electric brake
21 30A** Front wiper motor
22 20A** Low beam
23 30A** Ignition switch
24—Not used
25—Not used
26 15A* Fuel pump
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Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
27 20A* Trailer tow lamps
28 20A* Horn relay
29 60A** PJB
30 20A** Rear wiper motor
31—Not used
32—Not used
33 30A** Auxiliary blower motor
34 30A** Passenger power seat, Adjustable
pedals
35—Not used
36 40A** Blower motor
37 15A* A/C clutch relay, Transmission
38 15A* Coil on plug
39 15A* Injectors, Fuel pump relay
40 15A* PTEC power
41 15A* HEGO, VMV, CMS, PTEC
42 10A* Right low beam
43 10A* Left low beam
44 15A* Front foglamps
45 2A* Brake pressure switch (ABS)
46 20A* High beams
47—Horn relay
48—Fuel pump relay
49—High beam relay
50—Fog lamp relay
51—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
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Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
57—PTEC relay
58—Ignition relay
59—Not used
60—PCM diode
61—A/C clutch diode
62 30A CB Power windows circuit breaker
* Mini Fuses ** Maxi Cartridge Fuses
Rear relay box
The relay box is located on the rear passenger side quarter trim panel.
See your dealer or a certified technician for service of this relay box.
The relays are coded as follows:
Fuse/Relay Location Description
Relay 14 Not used
Relay 15 Trailer tow back-up lamps
Relay 16 Not used
Relay 17 Not used
Relay 18 Not used
Relay 19 Trailer tow park lamps
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Fuse/Relay Location Description
Relay 20 Trailer tow battery charge
Relay 21 Not used
Relay 22 Not used
Relay 23 Not used
Diode 3 Not used
Diode 4 Not used
Auxiliary relay box
The relay box is located on the front
right fender well underneath the
speed control module.
The relays are coded as follows:
Fuse/Relay Location Description
Relay 64 Open
Relay 65 Open
Relay 66 Open
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CHANGING THE TIRES
If you get a flat tire while driving:
•do not brake heavily.
•gradually decrease the vehicle’s speed.
•hold the steering wheel firmly.
•slowly move to a safe place on the side of the road.
The use of tire sealants is not recommended and may
compromise the integrity of your tires. The use of tire sealants
may also affect your tire pressure monitoring system (if equipped).
If your vehicle is equipped with a tire pressure monitoring
system, refer toTire Pressure Monitoring System (if
equipped)in theMaintenance and specificationssection for
important information. If the tire pressure monitor sensor becomes
damaged, it will no longer function.
Spare tire information
The spare tire can be used as a spare or a regular tire although the spare
wheel may not match the regular wheels.
If your vehicle is equipped with AWD, a spare tire of a different
size than the road tires should not be used. Such a tire could
make the vehicle difficult to control as well as result in damage to
driveline components.
Stopping and securing the vehicle
1. If you get a flat tire while driving,
do not apply the brake heavily;
instead, gradually decrease your
speed. Hold the steering wheel
firmly and slowly move to a safe
place on the side of the road.
2. Park on a level surface, activate
the hazard flashers and set the
parking brake.
3. Place gearshift lever in P (Park)
and turn engine OFF.
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