2002 FORD F750 heater

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment
Fuse Panel Description
28 10A Left Low Beam Headlamp
29 10A Cluster, GEM, 7.3L Power Stroke PCM
(clutch switch input), APCM (7.3L Power
Stroke only), Overhead Console
(SuperCrewzer only), Keyless Entry
Module (SuperCrewzer only), Traxx (Fuel)
Module (SuperCrewzer only)
30 30A 7.3L Power Stroke PCM Diode, 7.3L Power
Stroke Fuel Heater
31 15A Allison MD Transmission, Neutral Start
Relay and PCM (7.3L Power Stroke only)
Relay 1 Ð Interior Lamps
Relay 2 Ð Not Used
Relay 3 Ð Horn
Relay 4 Ð One Touch Down
Relay 5 Ð Not Used
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.
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.
Roadside Emergencies
155

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* Air Intake Heater Relay (CAT), Cummins
PCM
6 20A* CAT PCM, Cummins PCM
7 15A* Stop Lamps
8 25A* C AT Fuel Heater
9 30A* Trailer Hook Up lamps (SuperCrewzer
only)
10 15A* Shift Modulator (Allison AT trans only)
(Except for f650 SuperCrewzer and
Caterpillar/Cummins)
11 20A* Allison MD Trans, Allison 2000/2400 Trans
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
12 10A* Keyless Entry Module (SuperCrewzer only)
13 10A* Park Brake Adjustment Module
(SuperCrewzer only)
14 Ð Not Used
15 7.5A* Body Builder Prep (Hydraulic Vehicles
Only)
16 10A* Allison 2000/2400 Trans (Except F650
SuperCrewzer)
17 5A* Radio (SuperCrewzer only)
18 Ð Not Used
19 Ð Not Used
20 Ð Not Used
21 10A* GEM (Hydraulic Vehicles Only)
22 Ð Not Used
23 Ð Not Used
24 Ð Not Used
101 40A** ABS (Air Only)
102 20A** Body Builder Prep Run Feed
103 50A** Ignition Switch (JB 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
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)
Roadside Emergencies
157

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
115 40A** Ignition Switch (JB 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 Ð Washer Pump Relay
202 Ð Wiper Speed Relay
203 Ð Wiper Run/Park Relay
204 Ð 7.3L Power Stroke Neutral Start Relay,
Stoplamp Relay (CAT and Cummins only)
205 Ð Right Hand Stop/Turn Relay
206 Ð Left Hand Stop/Turn Relay
207 Ð Shift Modulator Relay (CAT and Power
Stroke only), Cummins VP-44 Relay, A/C
High Pressure Relay (SuperCrewzer only
208 Ð Backup Lamps Relay
209 Ð Stop Lamps Relay, Foglamps Relay
(SuperCrewzer only)
301 Ð Fuel Heater Relay (CAT and Cummins
only)/7.3L Power Stroke PCM Relay
302 Ð Park Lamps Relay
303 Ð Blower Motor Relay
304 Ð Air ABS Relay
401 Ð Not Used
501 Ð Not Used
502 Ð Not Used
503 Diode 7.3L Power Stroke PCM Diode
* Mini Fuses ** Maxi Fuses
Roadside Emergencies
158

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
161

Ordering additional owner's
literature .................................171
The Dispute Settlement
Board .......................................167
D
Daytime running lamps
(see Lamps) ................................61
Driving under special
conditions
through water .........................148
E
Emergencies, roadside
jump-starting ..........................164
Emission control system ..........231
Engine
check engine/service engine
soon light ....................................9
cleaning ...................................176
coolant .....................................189
Engine block heater .................110
Engine fan .................................195
Engine oil ..................................183
checking and adding ..............183
oil pressure gauge ....................17
recommendations ...................184
Exhaust fumes ..........................112
F
Foglamps .....................................62
Fuel ............................................196
calculating fuel
economy ..........................202, 204
choosing the right fuel ...........197
filling your vehicle with fuel ..196filter, specifications ........198±200
gauge .........................................18
improving fuel
economy ..........................202, 204
safety information relating to
automotive fuels .....................196
Fuses ..................................151±152
G
Gas mileage
(see Fuel economy) .........202, 204
Gauges .........................................16
battery voltage gauge ...............18
engine coolant temperature
gauge .........................................16
engine oil pressure gauge ........17
fuel gauge ..................................18
odometer ...................................19
speedometer .............................18
tachometer ................................19
trip odometer ............................19
H
Hazard flashers .........................150
Headlamps ...................................61
aiming ........................................62
daytime running lights .............61
flash to pass ..............................61
high beam ...........................15, 61
turning on and off ....................61
warning chime ..........................15
Heating
heater only system ...................56
heating and air conditioning
system .......................................57
Index
250