2003 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS oil pressure

Brake reserve system warning
(if equipped):Illuminates to indicate normal Hydromax booster reserve
system activation when the engine is OFF and the service brake pedal is
applied.
This light may also illuminate momentarily if the engine is running and
the driver turns the steering wheel fully in one direction while braking.
If the light remains on while the engine is running, this indicates
inadequate hydraulic booster pressure or reserve pump system failure.
Stop the vehicle safely as soon as possible and seek service immediately.
Anti-lock brake system:If the
ABS light stays illuminated or
continues to flash, a malfunction has
been detected, have the system
serviced immediately. Normal
braking is still functional unless the brake warning light also is
illuminated.
Safety belt:Reminds you to fasten
your safety belt. A chime will also
sound to remind you to fasten your
safety belt.
Charging system:Illuminates when
the battery is not charging properly.
Oil pressure/Engine coolant:
Illuminates when any of the
following conditions has occurred:
•The engine coolant temperature
is high.
•The engine oil pressure is low.
Check the engine oil and coolant level refer toAdding engine oil and
Adding coolantin theMaintenance and Specificationschapter.BRAKE
ABS
Instrumentation
9

Engine oil pressure gauge:
Indicates engine oil pressure. The
needle should stay in the normal
operating range (between “L” and
“H”). If the needle falls below the
normal range, stop the vehicle, turn
off the engine and check the engine
oil level. Add oil if needed. If the oil
level is correct, have your vehicle
checked at your dealership or by a
qualified technician.
Fuel gauge:Indicates
approximately how much fuel is left
in the fuel tank (when the ignition
is in the ON position).
L
H
Instrumentation
13

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
6 20A* Parklamp feeds, Instrument panel
fuse #41, Warning chime module,
Trailer tow running lamp relay
coil, I/P dimmer module
7 15A* Starter relay coil, BB neutral
sense
8 10A* Stoplamp switch (logic): Brake
pressure switch, Power brake
assist module***, Speed control
module, PCM, Anti-lock Brake
System (ABS) module, Brake shift
interlock actuator
9 5A* Alternator
10 20A* Daytime Running Lamps (DRL)
11 30A* Ignition coils, Radio capacitors #1
and #2, PCM relay
12 20A* Trailer tow running lamps feed,
Trailer tow back-up lamps feed, IP
- backup lamp feed
13 30A** Trailer tow electric brake
controller feed
14 60A** IP battery feed (fuse #9, 15, 21)
15 -- Not used
16 60A** ABS module
17 -- Not used
18 20A** Horn feed
19 -- Not used
20 40A** PCM relay
21 20A** Fuel pump motor
22 20A** Diagnostic tool connector, Cigar
lighter feed
23 40A** Blower motor feed
Roadside emergencies
43

ALUMINUM WHEELS AND WHEEL COVERS
Aluminum wheels or covers are coated with a clearcoat paint finish. In
order to maintain their shine:
•Clean weekly with Motorcraft Wheel and Tire Cleaner (ZC-37–A),
which is available from your dealer. Heavy dirt and brake dust
accumulation may require agitation with a sponge. Rinse thoroughly
with a strong stream of water.
•Never apply any cleaning chemical to hot or warm wheel rims or
covers.
•Some automatic car washes may cause damage to the finish on your
wheel rims or covers. Chemical-strength cleaners, or cleaning
chemicals, in combination with brush agitation to remove brake dust
and dirt, could wear away the clearcoat finish over time.
•Do not use hydrofluoric acid-based or high caustic-based wheel
cleaners, steel wool, fuels or strong household detergent.
•To remove tar and grease, use Ford Extra Strength Tar and Road Oil
Removal (B7A-19520–AA), available from your dealer.
ENGINE
Engines are more efficient when they are clean because grease and dirt
buildup keep the engine warmer than normal. When washing:
•Take care when using a power washer to clean the engine. The
high-pressure fluid could penetrate the sealed parts and cause
damage.
•Do not spray a hot engine with cold water to avoid cracking the
engine block or other engine components.
•Spray Motorcraft Engine Shampoo and Degreaser (ZC-20) on all parts
that require cleaning and pressure rinse clean.
•Never wash or rinse the engine while it is running; water in the
running engine may cause internal damage.
UNDERBODY
Flush the complete underside of your vehicle frequently. Keep body and
door drain holes free from packed dirt.
Cleaning
54

Installation
1. Install the fuel filter.
2. Lubricate the tube end with clean
engine oil meeting Ford
specification WSS-M2C153–Hto ease
assembly.
•Pull on the fitting to make sure it
is fully engaged, then install
safety clip.
•Align and push the tube into the
fitting until you hear a click.
3. Remove the EFI/CFI Fuel
Pressure Gauge.
4. Install the Schrader valve cap securely.
ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,600 km (1,000
miles) of driving (engine break-in period). You will get a more accurate
measurement after 3,000 km–5,000 km (2,000 miles-3,000 miles).
Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theRefill capacities
section of this chapter.
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
Maintenance and specifications
73