Page 198 of 312

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
31 15A* Clutch interlock switch (manual
transmissions only), Transmission
range sensor (automatic
transmissions only) then to
starter relay coil (all
transmissions), 4x4
32 5A* Radio (start)
33 15A* Front wiper
34 10A* Brake on-off switch
35 10A* Instrument cluster
36 10A* PCM Memory
37 15A* Horn
38 20A* Trailer tow park lamps
39 15A* Trailer tow back-up lamps
40 20A* Fuel pump
41 10A* Instrument cluster
42 15A* Delayed accessory
43 10A* Fog lamps
44—Not used
45 10A* Ignition switch Run/Start feed
46 10A* Left-hand lowbeam
47 10A* Right-hand lowbeam
48—Not used
101 30A** Trailer tow electric brake
102 30A** Door locks/Body security module
103 50A** Ignition switch (gasoline engine
only), FICM power (Diesel engine
only)
104 40A** Heated backlight
105 30A** Fuel heater (Diesel engine only)
106 30A** Front wiper main
107 40A** Front blower motor
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Roadside Emergencies
198
Page 236 of 312

SERVICE RECOMMENDATIONS
To help you service your vehicle:
•We highlight do-it-yourself items in the engine compartment for easy
location.
•We provide a scheduled maintenance guide which makes tracking
routine service easy.
If your vehicle requires professional service, your dealership can provide
the necessary parts and service. Check yourWarranty Guide/Owner
Information Guideto find out which parts and services are covered.
Use only recommended fuels, lubricants, fluids and service parts
conforming to specifications. Motorcraft parts are designed and built to
provide the best performance in your vehicle.
PRECAUTIONS WHEN SERVICING YOUR VEHICLE
•Do not work on a hot engine.
•Make sure that nothing gets caught in moving parts.
•Do not work on a vehicle with the engine running in an enclosed
space, unless you are sure you have enough ventilation.
•Keep all open flames and other burning (cigarettes) material away
from the battery and all fuel related parts.
Working with the engine off
•Automatic transmission:
1. Set the parking brake and shift to P (Park).
2. Turn off the engine and remove the key.
3. Block the wheels.
•Manual transmission:
1. Set the parking brake, depress the clutch and place the gearshift in 1
(First).
2. Turn off the engine and remove the key.
3. Block the wheels.
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
Maintenance and Specifications
236
Page 237 of 312
Working with the engine on
•Automatic transmission:
1. Set the parking brake and shift to P (Park).
2. Block the wheels.
•Manual transmission:
1. Set the parking brake, depress the clutch and place the gearshift in N
(Neutral).
2. Block the wheels.
Note:Do not start your engine with the air cleaner removed and do not
remove it while the engine is running.
OPENING THE HOOD
1. Inside the vehicle, pull the hood
release handle located under the
bottom left corner of the instrument
panel.
2. Go to the front of the vehicle and
release the auxiliary latch located
under the right center of the hood.
Slide the handle to release the
auxiliary latch.
3. Lift the hood until the lift
cylinders hold it open.
HOOD
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
237
Page 238 of 312
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
5.4L V8/6.8L V10 gasoline engines
Refer to the6.0 Liter Power Stroke Direct Injection Turbo Diesel
Owner’s Guide Supplementfor diesel engine component locations.
1. Engine oil dipstick
2. Clutch fluid reservoir (manual transmission)
3. Brake fluid reservoir
4. Underhood relay box
5. Power steering fluid reservoir
6. Air filter assembly
7. Engine coolant reservoir
8. Windshield washer fluid reservoir
9. Battery
10. Engine oil filler cap
11. Transmission fluid dipstick (automatic transmission)
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
238
Page 261 of 312

CLUTCH FLUID (IF EQUIPPED)
Check the clutch fluid level. Refer to theScheduled Maintenance
Guidefor the service interval schedules.
Use only a DOT 3 brake fluid designed to meet Ford specification
ESA-M6C25–A. Refer toLubricant Specificationsin this chapter.
Brake fluid is toxic. If brake fluid contacts the eyes, flush eyes
with running water for 15 minutes. Seek medical attention if
irritation persists. If taken internally, drink water and induce vomiting.
Seek medical attention immediately.
During normal operation, the fluid level in the clutch reservoir should
remain constant or rise slightly. If the fluid level drops, refill the fluid
level to the step in the reservoir.
1. Clean the reservoir cap before
removal to prevent dirt and water
from entering the reservoir.
2. Remove cap and rubber
diaphragm from reservoir.
3. Add fluid until the level reaches
the step in the reservoir.
4. Reinstall rubber diaphragm and
cap onto reservoir.
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
261
Page 284 of 312
REFILL CAPACITIES
FluidFord Part
NameApplication Capacity
Front axle Motorcraft SAE
80W-90
Premium Rear
Axle LubricantF-250/350
(Dana 60 axle)2.7L (5.8 pints)
F-350/450/550
(Dana 60 axle)2.7L (5.8 pints)
Rear axle Motorcraft SAE
75W-140
Synthetic Rear
Axle LubricantF-250 /350
(10.50 inch
axle)
1
3.3L (6.9 pints)
Motorcraft SAE
75W-90
Synthetic Rear
Axle LubricantF-350/450
(DANA 80)
14.0L (8.5 pints)
Motorcraft SAE
80W-90
Premium Rear
Axle LubricantF-550
(Dana S135)11.6L (24.5
pints)
Brake fluid (and
clutch fluid-if
equipped)Motorcraft High
Performance
DOT 3 Motor
Vehicle Brake
FluidAll Fill to line or
step (for clutch)
on reservoir
Engine coolant
2Motorcraft
Premium Gold
Engine Coolant
(yellow-colored)5.4L V8 engine
with A/C25.0L (26.4
quarts)
6.8L V10 engine 26.0L (27.5
quarts)
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
284
Page 288 of 312
ItemFord part
name or
equivalentFord part
numberFord
specification
Rear axleMotorcraft SAE
75W-140
Synthetic Rear
Axle Lubricant
(10.5 inch)
1
XY-75W140–QL WSL-M2C192-A
Motorcraft SAE
75W-90
Synthetic Rear
Axle Lubricant
1
XY-75W90–GLS–
Motorcraft SAE
80W-90
Premium Rear
Axle Lubricant
(Dana S135
axles)XY-80W90-QL WSP-M2C197-A
Brake fluid and
clutch fluid (if
equipped)Motorcraft High
Performance
DOT 3 Motor
Vehicle Brake
FluidPM-1 ESA-M6C25-A
and DOT 3
Engine coolant Motorcraft
Premium Gold
Engine Coolant
(yellow-colored)VC-7-A (U.S.,
except CA and
OR), VC-7-B
(CA and OR
only)WSS-M97B51-A1
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
288
Page 289 of 312
ItemFord part
name or
equivalentFord part
numberFord
specification
Engine oilMotorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada)
XO-5W20-QSP
(US)
CXO-5W20–LSP12
(Canada)WSS-M2C153-H
and API
Certification
Mark
Hinges, latches,
striker plates,
fuel filler door
hinge and seat
tracksMulti-Purpose
GreaseXG–4 or XL-5 ESR-M1C159-A
or
ESB-M1C93–B
Lock cylindersMotorcraft
penetrating and
lock lubricantXL-1 none
Transmission
/steering/parking
brake linkages
and pivots,
brake and clutch
pedal shaft (if
equipped)Motorcraft
Premium
Long-Life GreaseXG-1-C or
XG-1-KESA-M1C75-B
Power steering
fluid and
transfer case
fluid (if
equipped)Motorcraft
MERCONAT FXT-2-QDX MERCON
Manual
transmission
(6-speed)Motorcraft
MERCONAT F
2
XT-2-QDX MERCON
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
289