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Fuse/Relay
Location
Fuse Amp
Rating
Description
25
5A
4-Wheel Anti-Lock Brake System (4WABS)
Module
26
—
Not Used
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.
Roadside emergencies
154
Summary of Contents for 1998 F-450
Page 166: ...Front driver side 4x4 Front passenger side 4x4 Roadside emergencies 166...
Page 231: ...3 2 1 5 4 Capacities and specifications 231...
Page 237: ...237...
Page 238: ...238...