2003 FORD F750 trailer

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

The high-current fuses and relays are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
1 15A* Park lamps, Roof lamps
2 25A* Cummins Powertrain Control
Module (PCM)
15A* Foglamps (SuperCrewzer only)
3 10A* Generator
4 15A* Washer pump
5 15A* CAT air intake heater relay,
Cummins PCM
6 20A* CAT PCM, Cummins PCM
7 15A* Stop lamps
8 25A* CAT fuel heater
9 30A* Trailer hook-up lamps
(SuperCrewzer only)
10 15A* Shift modulator (Allison AT
transmission only) (except for
F–650 SuperCrewzer and
Caterpillar/Cummins)
503
304
303
302301
502
501
207201
202
203
204122118114110106102
121117113109105101
120116112108104
119115111107103
24
209206
208
18161412108642
1715131197531
205
23
22
21
401
20
19
Roadside Emergencies
156

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

The relays are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingDescription
1 30A** Trailer Tow Run Feed
2 30A** Trailer Tow Park/Marker Lamps
3 30A** Trailer Tow Stop Lamps
4 30A** Trailer Tow Turn/Stop Lamps
5—Not Used
R1—Trailer Tow Run Relay
R2—Trailer Tow Stop Lamp relay
R3—Trailer Tow Park/Marker Lamp
Relay
R4—Trailer Tow Park/Marker Lamp
Relay
R5—Not Used
R6—Not Used
R7—Trailer Tow Left Turn/Stop Lamp
Relay
R8—Trailer Tow Right Turn/Stop Lamp
Relay
** Maxi Fuse
Roadside Emergencies
160

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

A
Air cleaner filter .......................206
Air conditioning
manual heating and air
conditioning system .................57
Audio system
(see Radio) ................20, 25, 32, 40
Automatic transmission ............132
Auxiliary power point .................73
B
Battery .......................................184
jumping a disabled battery ....165
voltage gauge ............................17
BeltMinder ...................................96
Brakes ................................113, 119
anti-lock ...................114–115, 121
anti-lock brake system
(ABS) warning light ...11–12, 115
brake warning light ............11–12
fluid, checking and adding ....203
parking ....................116, 118, 122
pedals (see Power
adjustable foot pedals) ............73
trailer .......................................124
C
CD-6 disc .....................................40
CD-single premium .....................32
Child safety restraints ..............101
child safety belts ....................101
Child safety seats ......................104
attaching with tether straps ..108
in front seat ............................106
in rear seat ..............................106
tether anchorage hardware ...108Cleaning your vehicle
engine compartment ..............175
exterior ....................................177
instrument panel ....................176
interior .....................................176
plastic parts ............................176
washing ....................................174
waxing .....................................174
wheels ......................................175
woodtone trim ........................176
Climate control (see Air
conditioning or Heating) ......56–57
Clock ..........................23, 29, 36, 44
Clutch ........................................202
fluid ..........................................202
Compass, electronic ....................70
calibration .................................72
set zone adjustment .................71
Console
overhead ....................................70
Controls
power seat .................................89
Coolant ......................................186
refill capacities ........................190
Cruise control
(see Speed control) ....................76
Customer Assistance ................150
Getting assistance outside
the U.S. and Canada ..............171
Getting roadside assistance ...150
Getting the service
you need .................................166
Ordering additional
owner’s literature ...................172
The Dispute Settlement
Board .......................................168
Index
243