1999 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS fuel pump

Door ajar
Illuminates when the ignition is in
the ON or START position and any
door is open.
Fuel reset
Illuminates when the ignition is
turned to the ON position and the
fuel pump shut-off switch has been
triggered. For more information,
refer toFuel pump shut-off switch
in theRoadside emergencieschapter.
High beams
Illuminates when the high beam
headlamps are turned on.
Turn signal
Illuminates when the left or right
turn signal or the hazard lights are
turned on. Refer toExterior bulbs
in theMaintenance and care
chapter.
Safety belt warning chime
Chimes to remind you to fasten your safety belts.
Key-in-ignition warning chime
Sounds when the key is left in the ignition in the OFF/LOCK or ACC
position and the driver’s door is opened.
Headlamps on warning chime
Sounds when the headlamps or parking lamps are on, the ignition is off
(and the key is not in the ignition) and the driver’s door is opened.
DOOR
AJAR
FUEL
RESET
Instrumentation
9

HAZARD LIGHTS CONTROL
Use only in an emergency to warn traffic of vehicle breakdown,
approaching danger, etc. The hazard flashers can be operated when the
ignition is off.
•The hazard lights control is
located on top of the steering
column.
•Depress hazard lights control to
activate the hazard flashers.
•Depress control again to turn the
flashers off.
FUEL PUMP SHUT-OFF SWITCH
If the engine cranks but does not start after a collision, the fuel pump
shut-off switch may have been activated. The “Fuel Reset” indicator light
will illuminate in the instrument cluster. The shut-off switch is a device
intended to stop the electric fuel pump when your vehicle has been
involved in a substantial jolt.
1. Turn the ignition to the OFF position.
2. Check the fuel system for leaks.
3. If no fuel leak is apparent, reset the fuel pump shut-off switch by
pushing in the button on the switch.
4. Turn the ignition to the ON position. Pause for a few seconds and
return the key to the OFF position.
5. Make a further check for leaks in the fuel system.
Roadside emergencies
37

The fuel pump shut-off switch is
located on a bracket above the
brake pedal.
Use the following procedure to reset the fuel pump shut-off switch.
1. Turn the ignition to the OFF position.
2. Check the fuel system for leaks.
3. If no fuel leak is apparent, reset the fuel pump shut-off switch by
pushing in on the reset button.
4. Turn the ignition to the ON position. Pause for a few seconds and
return the key to the OFF position.
5. Make a further check for leaks in the fuel system.
Roadside emergencies
38

The high-current fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingDescription
1 5A* Power Brake Assist Module***
2 20A* Horn Feed
3 20A* 4R100 Transmission, Vapor Management
Valve Solenoid, Heated Exhaust Gas Oxygen
(HEGO) Sensors, EVR Solenoid
4 5A* Powertrain Control Module Memory
5 15A* Powertrain Control Module Power, Fuel
Pump Relay Coils, Fuel Injectors, IAC
Solenoid, Mass Air Flow Sensor
6 20A* Front Park Lamp Feed, Rear Park Lamp
Feed, Trailer Tow Running Lamp Relay Coil,
I/P Dimmer Module
7 15A* Starter Relay Coil, BB Neutral Sense
19 29
18 28
17 27
16 26
15 25
14 24
13
11 12
910
78
56
34
1223
22
21
20
6
5
4
3
2
1DIODE2
DIODE1
Roadside emergencies
43

Fuse/Relay
LocationFuse Amp
RatingDescription
8 10A* Brake Pressure Switch, Stop Lamp Switch for
Power Brake Assist Module*, Speed Control
Module, Powertrain Control Module, ABS
module, Brake Shift Interlock Actuator
9 5A* Alternator
10 20A* Daytime Running (DRL) Lamps
11 30A* Ignition Coils, Radio Capacitors #1 and #2,
Powertrain Control Module Relay
12 20A* Trailer Tow Running Lamps Feed, Trailer Tow
Backup Lamps Feed, IP-Backup Lamp Feed
13 30A** Trailer Tow Electric Brake Controller Feed
14 60A** Right Turn Signal Relay Contacts, Left Turn
Signal Relay Contacts, Hazard Flasher, Stop
Lamp Switch - Trailer Brake Control Feed,
Stop Lamp Switch - Brake Lamp Feeds
15 -- Not Used
16 60A** ABS Module
17 -- Not Used
18 -- Not Used
19 -- Not Used
20 40A** Powertrain Control Module Relay
21 20A** Fuel Pump Motor
22 20A** Diagnostic Tool Connector, Cigar Lighter
23 40A** Blower Motor Relay Contacts
24 40A** Courtesy Lamp Relay Contacts, Cluster
Memory, BB Battery Feed
25 50A** Ignition Switch Feed #2 (Terminals B4 & B5)
26 60A** Ignition Switch Feed #3 (Terminals B1 & B3)
27 30A** Headlamp Switch (Headlamps On), Flash To
Pass Switch
28 — Not Used
29 60A** Power Brake Assist Motor
Roadside emergencies
44

Fuse/Relay
LocationFuse Amp
RatingDescription
Relay 1 — Daytime Running Lamps On/Off Relay
Relay 2 — Fuel Pump Relay
Relay 3 — Horn Relay
Relay 4 — Two Speed Fuel Pump Relay
Relay 5 — Blower Motor Relay
Relay 6 — Powertrain Control Module Relay
Diode 1 — Powertrain Control Module Diode
Diode 2 — Park Brake Diode
* Mini Fuses ** Maxi Fuses ***Vehicles with Hydromax brake assist
only
CHANGING THE TIRES
If you get a flat tire while driving, do not apply the brake heavily.
Instead, gradually decrease your speed. Hold the steering wheel firmly
and slowly move to a safe place on the side of the road.
Tire change procedure
Preparing to change the tire
To prevent the vehicle from moving when you change a tire, be
sure the parking brake is set, then block (in both directions) the
wheel that is diagonally opposite (other side and end of the vehicle) to
the tire being changed.
1. Park on a level surface.
2. Activate the warning flashers.
3. Place the gearshift in P (Park).
Roadside emergencies
45

The flow of fuel through a fuel pump nozzle can produce static
electricity, which can cause a fire if fuel is pumped into an
ungrounded fuel container.
Use the following guidelines to avoid static build-up when filling an
ungrounded fuel container:
•Place approved fuel container on the ground.
•DO NOT fill a fuel container while it is in the vehicle.
•Keep the fuel pump nozzle in contact with the fuel container while
filling.
•DO NOT use a device that would hold the fuel pump handle in the fill
position.
Choosing the right fuel
Use only UNLEADED FUEL. The use of leaded fuel is prohibited by law
and could damage your vehicle.
Do not use fuel containing methanol. It can damage critical fuel system
components.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based compounds containing MMT.
Repairs to correct the effects of using a fuel for which your vehicle was
not designed may not be covered by your warranty.
Octane recommendations
Your vehicle is designed to use
“Regular” unleaded gasoline with an
(R+M)/2 octane rating of 87. We do
not recommend the use of gasolines
labeled as “Regular” that are sold
with octane ratings of 86 or lower in high altitude areas.
Do not be concerned if your engine sometimes knocks lightly. However, if
it knocks heavily under most driving conditions while you are using fuel
with the recommended octane rating, see your dealer or a qualified
service technician to prevent any engine damage.
87(R+M)/2 METHOD
Maintenance and care
73

Fuel quality
If you are experiencing starting, rough idle or hesitation driveability
problems during a cold start, try a different brand of “Regular” unleaded
gasoline. “Premium” unleaded gasoline is not recommended (particularly
in the United States) because it may cause these problems to become
more pronounced. If the problems persist, see your dealer or a qualified
service technician.
It should not be necessary to add any aftermarket products to your fuel
tank if you continue to use a high quality fuel.
Cleaner air
Ford approves the use of gasolines to improve air quality, including
reformulated gasolines that contain oxygenates up to 10% ethanol or
15% MTBE.
Running out of fuel
Avoid running out fuel because this situation may have an adverse affect
on powertrain components.
If you have run out of fuel:
•You may need to crank the engine several times after refueling before
the system starts to pump the fuel from the tank to the engine.
•Your “Service Engine Soon” indicator may come on. For more
information on the “Service Engine Soon” indicator, refer to the
Instrumentationchapter.
EMISSION CONTROL SYSTEM
Your vehicle is equipped with various emission control components and a
catalytic converter which will enable your vehicle to comply with
applicable exhaust emission standards. To make sure that the catalytic
converter and other emission control components continue to work
properly:
•Use only unleaded fuel.
•Avoid running out of fuel.
•Do not turn off the ignition while your vehicle is moving, especially at
high speeds.
•Have the items listed in your Scheduled Maintenance Guide performed
according to the specified schedule.
Maintenance and care
74