2003 FORD F750 brake

The fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
1 20A Horn
2 15A Turn/Hazard lamps
3 20A Cigar lighter
4 10A Diagnostic connectors
5 15A Back-up lamps, Daytime Running
Lamps (DRL) relays, Blend door
actuator, Heated seat module
(SuperCrewzer only), On/Off fan
clutch (SuperCrewzer only),
Warning chime module
(SuperCrewzer and Ambulance)
6—Not used
7—Not used
8 5A Radio, GEM
9 5A Switch Illumination (headlamp,
power windows, power door
locks), Power window relay,
Trailer hook-up lamps
(SuperCrewzer only)
10—Not used
11 30A Wiper motor, Washer pump relay
12 10A Stoplamp switch (hydraulic brake
vehicles only)
13 20A Radio, Cluster, 7.3L Power Stroke
Powertrain Control Module
(PCM), Keep Alive Memory
14 10A Interior lamps, Running board
lamps (SuperCrewzer only)
Roadside Emergencies
153

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
15 10A GEM, Interior lamp relay, Map
lamps, Glove box lamps
(SuperCrewzer only), Power
mirrors (SuperCrewzer only),
Warning chime module
(SuperCrewzer only)
16 15A Highbeams
17—Not used
18 5A Headlamp switch, GEM
19 15A Engine, Cluster, Cummins PCM,
CAT PCM, 7.3L Power Stroke
PCM (idle valid switch input),
Alternator (Ambulance only)
20 15A Starter relay, GEM
21 10A DRL
22 15A Exhaust brake (SuperCrewzer
only), Heated mirrors
(SuperCrewzer only), Rear air
suspension (SuperCrewzer and
Ambulance)
23 10A Electronic flasher
24 15A Vacuum pump, Air dryer, ABS,
Fuel heater relay
25 10A Blower motor relay
26 10A Right-hand low beam headlamp
27—Not used
28 10A Left-hand low beam headlamp
Roadside Emergencies
154

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
11 20A* Allison MD transmission, Allison
2000/2400 transmission
12 10A* Keyless entry module
(SuperCrewzer only)
13 10A* Park brake adjustment module
(SuperCrewzer only)
14—Not used
15 7.5A* Body builder prep (hydraulic
brake vehicles only)
16 10A* Allison 2000/2400 transmission
(except F650 SuperCrewzer)
17 5A* Radio (SuperCrewzer only)
18—Not used
19—Not used
20—Not used
21 10A* GEM (hydraulic brake vehicles
only)
22—Not used
23—Not used
24—Not used
101 40A** Anti-lock Brake System (ABS)
(air brake vehicles only)
102 20A** Body builder prep run feed
103 50A** Ignition switch (Junction box
fuses 8, 9, 11, 19, 20, 22, 23, 24,
25, 29, 30, 31)
104 20A** Power point
105 20A** Power door locks
106 30A** Headlamps
107 50A** Junction box battery feed (fuses
1, 2, 3, 4, 12, 13, 14, 15)
108 40A** Cummins fuel heater
Roadside Emergencies
157

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
109 40A** Power windows
110 30A** Power seats (SuperCrewzer only)
111 30A** Body builder prep
112 40A** Blower motor
113 30A** Heated seats (SuperCrewzer only)
114 30A** E-brake (SuperCrewzer only)
115 40A** Ignition switch (Junction box
fuses 5, 8, 9, 11, 21)
116 30A** Body builder prep
117 20A** 7.3L Power Stroke PCM
118 30A** IDM (7.3L Power Stroke only)
119/120 60A** Hydraulic ABS, Air brake trailer
tow fuse block
121/122 60A** Hydromax motor, Air brake trailer
tow fuse block
201—Washer pump relay
202—Wiper speed relay
203—Wiper run/park relay
204—7.3L Power Stroke neutral start
relay, Stoplamp relay (CAT and
Cummins only)
205—Right-hand stop/turn relay
206—Left-hand stop/turn relay
207—Shift modulator relay (CAT and
Power Stroke only), Cummins
VP-44 Relay, A/C high-pressure
relay (SuperCrewzer only)
208—Back-up lamps relay
209—Stop lamps relay, Foglamps relay
(SuperCrewzer only)
Roadside Emergencies
158

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
301—Fuel heater relay (CAT and
Cummins only)/7.3L Power Stroke
PCM relay)
302—Park lamps relay
303—Blower motor relay
304—Air ABS relay
401—Not used
501—Not used
502—Not used
503 Diode 7.3L Power Stroke PCM diode
* Mini Fuses ** Maxi Fuses
Relays
The relay box is located on the rear crossmember.
Air Brake Trailer Tow Relays (if equipped)
Roadside Emergencies
159

SuperCrewzer (if equipped)
The relays are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingDescription
1—Not Used
2—Not Used
3—Not Used
4—Not Used
5—Not Used
R1—Trailer Hookup Lamps Relay
R2—Exhaust Brake Relay
R3—Exhaust Brake Relay
R4—Not Used
R5—Not Used
R6—Not Used
R7—Not Used
R8—Not Used
HOOK
LAMP
RELAYNOT
USED N.U.
N.U.
N.U.
N.U.
N.U. NOT
USED
NOT
USED NOT
USED N.U.EXHAUST
BRAKE
RELAY#2 EXHAUST
BRAKE
RELAY#11 R1 R3
R5 R6
R2 R4
R7 R82
3
4
5
Roadside Emergencies
161

JUMP STARTING YOUR VEHICLE
The gases around the battery can explode if exposed to flames,
sparks, or lit cigarettes. An explosion could result in injury or
vehicle damage.
Batteries contain sulfuric acid which burns skin, eyes, and
clothing.
Preparing your vehicle
Also see the label on the battery.
1. Use only a 12–volt supply to start your vehicle. If you connect your
battery to a 24–volt power supply you can damage your starter, ignition
system and other electrical components. Do not attach the jumper cables
to the glow plug relay as this could severely damage the glow plugs,
injector driver module and PCM.
2. Do not disconnect the battery of the disabled vehicle as this could
damage the vehicle’s electrical system.
3. Park the booster vehicle close to the disabled vehicle making sure
theydo nottouch. Set the parking brake on both vehicles and stay clear
of the engine cooling fan and other moving parts.
4. Check all battery terminals and remove any excessive corrosion before
you attach the battery cables. Ensure the vent caps are tight and level.
5. Turn the heater fan on in both vehicles to protect any electrical
surges. Turn all other accessories off.
Roadside Emergencies
162

Connecting the jumper cables
1. Position the vehicles so that they
do not touch one another.
2. Apply the parking brakes.
3. Switch off the engine and any
unnecessary electrical equipment.
4. Find the positive (+) terminal of
the discharged battery.
5. Using the jumper cables, connect
the positive (+) terminal of the
discharged battery to the positive
(+) terminal of the booster battery.
NOTE:In the illustration,
lightning bolts are used to
designate the assisting (boosting)
battery.
6. Connect one end of the cable to
the negative (-) terminal of the
booster battery and the other end to
a ground at least 12 inches from the
battery of the discharged vehicle. The vehicle frame is usually a good
ground.
7. Ensure that the jump leads are clear of moving parts of the engine,
and that the clamps from one cable do not touch the clamps on the
other cable.
8. Do not lean over the batteries when making the connections.
Do not connect the end of the second cable to the negative (-)
terminal of the battery to be jumped. A spark may cause an
explosion of the gases that surround the battery.
Jump starting
1. Start the booster vehicle and run the engine at moderately increased
speed.
2. After a few minutes, start the engine of the vehicle with the
discharged battery.
3. After starting, run the engine at about 1,000 RPM for 3–5 minutes.
13
2
4
Roadside Emergencies
163