Power Distribution Box - Ford 1999 F-350 Owner's Manual

Fuse/Relay Fuse Amp
Location Rating
27 10A
28 10A
29 5A
30 30A
31 —
Relay 1 —
Relay 2 —
Relay 3 —
Relay 4 —
Relay 5 —

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
Description
Ignition Run Power Feed (Customer
Access)
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
Instrument Cluster (Charge and Airbag
Warning Lamps)
PCM Relay Coil, Ignition Coil (Gasoline
only), Fuel Heater (Diesel only), Wastegate
Solenoid (Diesel only), Injector Driver
Module Relay Coil (Diesel only)
Not Used
Interior Lamp Relay
Not Used
Horn
Power Window One Touch Down Relay
Accessory Delay Relay
149