F-250 Light Duty (1999 year). Instruction - page 37
Fuse/Relay
Location
Fuse Amp
Rating
Description
8
5A
Radio, Headlamp Switch Illumination
9
—
Not Used
10
—
Not Used
11
10A
Washer Pump, Wiper Run/Park Relay Coil,
Wiper Hi/LO Relay Coil, Washer Pump
Relay Coil
12
15A
Horn
13
20A
Stop Lamps, Center High-mount Stop
Lamp, Trailer Tow Stop Lamp
14
10A
Dome Lamp, Cargo Lamp, Courtesy Lamps
15
5A
Generic Electronic Module (GEM),
Powertrain Control Module (PCM),
Anti-lock Brake System (ABS) Module,
Brake Shift Interlock, Speed Control
16
15A
Instrument Cluster, Hi-beam Headlamps
17
—
Not Used
18
—
Not Used
19
10A
Auxiliary Powertrain Control Module
(APCM) (Diesel only), Instrument Cluster,
GEM Module, Overdrive Cancel Switch, Idle
Validation Switch (Diesel only), Overhead
Console
20
15A
Starter Motor Relay Coil, PCM (Gasoline
only)
21
—
Not Used
22
10A
Air Bag Module, Passenger Air Bag
Activation Switch, Blower Motor Relay Coil
23
10A
Electronic Flasher
24
10A
Blend Door Actuator, Trailer Tow Battery
Charge Relay Coil
25
5A
4-Wheel Anti-Lock Brake System (4WABS)
Module
26
—
Not Used
Roadside emergencies
148
Fuse/Relay
Location
Fuse Amp
Rating
Description
27
10A
Ignition Run Power Feed (Customer
Access)
28
10A
Brake Shift Interlock, DRL Relay Coil,
Speed Control Module, Backup Lamps,
Trailer Tow Backup Lamp Relay Coil,
Electronic Shift On The Fly Hub Lock
Solenoid
29
5A
Instrument Cluster (Charge and Airbag
Warning Lamps)
30
30A
PCM Relay Coil, Ignition Coil (Gasoline
only), Fuel Heater (Diesel only), Wastegate
Solenoid (Diesel only), Injector Driver
Module Relay Coil (Diesel only)
31
—
Not Used
Relay 1
—
Interior Lamp Relay
Relay 2
—
Not Used
Relay 3
—
Horn
Relay 4
—
Power Window One Touch Down Relay
Relay 5
—
Accessory Delay Relay
Power distribution box
The power distribution box, trailer tow and electronic shift on the fly
relay blocks are located in the engine compartment near the brake
master cylinder.
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
Battery section of the Maintenance and Care chapter.
Roadside emergencies
149
The high-current fuses and relays are coded as follows.
Fuse/Relay
Location
Fuse Amp
Rating
Description
1
7.5A *
Trailer Tow Left Stop/Turn Lamp
2
10A*
Air Bag Module
3
7.5A*
Trailer Tow Right Stop/Turn Lamp
4
20A*
Trailer Tow Backup Lamps, Trailer Tow
Park Lamps
5
20A*
(Gasoline
only)
5A* (Diesel
only)
Gasoline only-PCM, Two Speed Fuel Pump
Relay Coil, Fuel Pump Relay Coil, Mass Air
Flow Sensor, Fuel Injectors
Diesel only-Dual Alternator
⬙A⬙ Field
6
-
(Gasoline
only)
10A*(Diesel
only)
Gasoline only-Not Used
Diesel only-Single or Dual Alternator
⬙A⬙
Field, Regulator
19
29
18
28
30
31
32
33
34
35
37
36
17
27
16
26
15
25
14
24
13
11
12
91
0
78
56
34
12
23
22
21
20
Roadside emergencies
150
Fuse/Relay
Location
Fuse Amp
Rating
Description
7
20A*
(Gasoline
only)
5A* (Diesel
only)
Gasoline only-Vapor Managment Valve,
HEGO Sensors, Intake Manifold
Communication Control, EVR Solenoid,
PCM, Canister Vent Solenoid
Diesel only-Dual Alternator
⬙A⬙ Field
8
15A*
Trailer Tow Electronic Brake Illumination,
Park Lamps, Trailer Tow Park Lamp Relay
Coil
9
10A*
Left Headlamp
10
25A*
Power Point
11
10A*
Right Headlamp (Low Beam)
12
10A*
Daytime Running Lamps (DRL) Resistor
13
30A**
Multi-function Switch, Headlamps
14
60A**
Anti-Lock Brake System
15
30A**
Windshield Wiper Motor
16
30A**
Trailer Tow Battery Charge
17
30A**
Electronic Shift On The Fly Relay, Transfer
Case Shift Motor
18
30A**
Power Seat
19
20A**
Fuel Pump Motor, PCM
20
50A**
Ignition Switch (B4 & B5)
21
50A**
Ignition Switch (B1 & B3)
22
50A**
Instrument Panel Junction Box
23
40A**
Blower Motor
24
30A**
Power Distribution Box
25
30A***
Power Windows
26
20A**
If equipped with Remote Keyless
Entry-Driver Door Unlock Relay Coil, All
Door Unlock Relay Coil, All Door Lock
Relay Coil, Park Lamp Flash Relay, If not
equipped with Remote Keyless
Entry-Power Door Lock Motors
Roadside emergencies
151