2003 FORD F750 horn

Unlocking the doors
Press this control to unlock the
driver’s door. The interior lamps will
illuminate.
Press the control a second time
within five seconds to unlock all
doors.
Locking the doors
Press this control to lock all doors.
To confirm all doors are closed and
locked, press the control a second
time within five seconds. The doors
will lock again, the horn will chirp
and the lamps will flash.
If any of the doors are ajar, the horn
will make two quick chirps,
reminding you to properly close all
doors.
Sounding a panic alarm
Press both controls to activate the
alarm. The horn will sound and the
lights will flash.
To deactivate the alarm, press both
controls again or turn the ignition to
ACC or ON.
Locks and Security
83

COLOR
Fuse
ratingMini
fusesStandard
fusesMaxi
fusesCartridge
maxi
fusesFuse link
cartridge
25A Natural Natural———
30A Green Green Green Pink Pink
40A——Orange Green Green
50A——Red Red Red
60A——Blue—Yellow
70A——Ta n—Brown
80A——Natural—Black
Passenger compartment fuse panel
The fuse panel is located below and to the left of the steering wheel by
the brake pedal. Remove the panel cover to access the fuses.
To remove a fuse use the fuse puller tool provided on the fuse panel
cover.
Relay #1
Relay #2
Relay #3
Horn
Relay #4
Relay #5 One Touch
Down Interior
Lamps#1
#12#22
#2
#3
#4
#5
#6
#7
#8
#9
#10
#11#13
#23
#14
#15
#16
#17#24
#25
#26
#27
#18
#28
#19
#29
#20
#21#30
#31
Roadside Emergencies
152

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
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—Interior lamps
Relay 2—Not used
Relay 3—Horn
Relay 4—One touch down power window
Relay 5—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

Daily Owner Checks Engine system
Check the air filter restriction indicator
Check the engine oil
Inspect the coolant level - for Powerstroke
engine (for Caterpillar and Cummins engines,
refer to the Owner’s Manual)
Brake system
Drain the air brake system reservoir - manual
valve
Check the air brake system reservoir
automatic drain valve operation
Transmission system
Visually check the automatic transmission for
fluid leakage
Steering system
Check the power steering pump fluid level and
check the system for leaks
Check the entire vehicle for evidence of fluid
leaks
U.S. Department of Transportation,
Federal Highway Administration
requirements (ensure that the entire
system is functioning properly)
Check the service brakes
Check the parking brake
Check the steering mechanism
Check the lighting devices and reflectors
Check the tires
Check the horn
Check the windshield wipers
Check the rear vision mirrors
Check the wheels and rims
Check the emergency equipment
General Maintenance Information
232