1999 Ford F550 Fuse Box Diagram

In this article, we’ll provide a detailed overview of the 1999 Ford F550 fuse box diagram, explaining the purpose of each fuse and guiding you through the layout for a better understanding of how they work.

Let’s start with the importance of Fuse Box, and Diagram.

Standard fuse amperage rating and color

Fuse RatingMini FusesStandardFusesMaxi FusesCartridgeMaxiFusesFuse LinkCartridge

1999 Ford F550 Fuse Box Diagram (Power Distribution Box)

In the engine compartment, close to the brake master cylinder, you’ll find the power distribution box, trailer tow, and electronic shift-on-the-fly relay blocks. These important components are responsible for managing and controlling various electrical systems in your vehicle.

The power distribution box is equipped with high-current fuses that are specifically designed to protect the main electrical systems of your vehicle from potential overloads. These fuses act as protective barriers, shielding sensitive electrical components from any damage.

  1. Inside the vehicle, pull the hood release handle located under the bottom left corner of the instrument panel.
  2. Go to the front of the vehicle and release the auxiliary latch located under the right center of the hood.
    Slide the handle to release the auxiliary latch.
  3. Lift the hood until the lift cylinders hold it open.
Fuse/Relay LocationFuse AmpRatingDescription
17.5A *Trailer Tow Left Stop/Turn Lamp
210A*Air Bag Module
37.5A*Trailer Tow Right Stop/Turn Lamp
420A*Trailer Tow Backup Lamps, Trailer Tow Park Lamps
520A*(Gasoline only)5A* (Diesel only)Gasoline only-PCM, Two Speed Fuel PumpRelay Coil, Fuel Pump Relay Coil, Mass AirFlow Sensor, Fuel InjectorsDiesel only-Dual Alternator A Field
6-(Gasoline only)10A*(Diesel only)Gasoline only-Not UsedDiesel only-Single or Dual Alternator AField, Regulator
720A*(Gasoline only)5A* (Diesel only)Trailer Tow Electronic Brake Illumination, Park Lamps, Trailer Tow Park Lamp RelayCoil
815A*Trailer Tow Electronic Brake Illumination,Park Lamps, Trailer Tow Park Lamp RelayCoil
910A*Left Headlamp
1025A*Power Point
1110A*Right Headlamp (Low Beam)
1210A*Daytime Running Lamps (DRL) Resistor
1330A**Multi-function Switch, Headlamps
1460A**Anti-Lock Brake System
1530A**Windshield Wiper Motor
1630A**Trailer Tow Battery Charge
1730A**Electronic Shift On The Fly Relay, Transfer Case Shift Motor
1830A**Power Seat
1920A**Fuel Pump Motor, PCM
2050A**Ignition Switch (B4 & B5)
2150A**Ignition Switch (B1 & B3)
2250A**Instrument Panel Junction Box
2340A**Blower Motor
2430A**Power Distribution Box
2530A***Power Windows
2620A**If equipped with Remote KeylessEntry-Driver Door Unlock Relay Coil, AllDoor Unlock Relay Coil, All Door Lock Relay Coil, Park Lamp Flash Relay, If not equipped with Remote Keyless Entry-Power Door Lock Motors
27-(Gasoline only)30A*(Diesel only)Gasoline only-Not UsedDiesel only-Injector Driver Module
2830A**Trailer Tow Electronic Brake Controller
30PCM Power Relay
31Blower Motor Relay
32Two Speed Fuel Pump Relay (Gasoline only), Injector Driver Module Power Relay (Diesel only)
33Washer Pump Relay
34Windshield Wiper Park/Run Relay
35Windshield Wiper HI/LO Relay
36Not Used
37PCM Relay Diode
38Trailer Tow Backup Lamp Relay
39Trailer Tow Battery Charge Relay
40Electronic Shift On The Fly Relay #1, Electronic Shift On The Fly Relay #2
* Mini Fuses ** Maxi Fuses ***Circuit Breaker

1999 Ford F550 Passenger Compartment Fuse Panel Diagram


The passenger compartment fuse panel is located below and to the left of the steering wheel, near the brake pedal of your 1999 Ford F550. To access the fuses, just remove the panel cover.

To remove the cover of the fuse panel, turn the panel fasteners counterclockwise.

When removing a fuse, use the fuse puller tool provided on the cover of the fuse panel.

Fuse/Relay LocationFuse AmpRatingDescription
120AElectronic Flasher
25AInstrument Cluster, Powertrain Control
Module (PCM) Keep Alive Memory
320ACigar Lighter, OBDII
410AGlove Box Lamp, Map Lamps, Power Mirrors, Underhood Lamp
5Not Used
6Not Used
75APower Window Lock Switch Illumination
85ARadio, Headlamp Switch Illumination
9Not Used
10Not Used
1110AWasher Pump, Wiper Run/Park Relay Coil,Wiper Hi/LO Relay Coil, Washer Pump Relay Coil
1320AStop Lamps, Center High-mount Stop Lamp, Trailer Tow Stop Lamp
1410ADome Lamp, Cargo Lamp, Courtesy Lamps
155AAuxiliary Powertrain Control Module(APCM) (Diesel only), Instrument Cluster, GEM Module, Overdrive Cancel Switch, IdleValidation Switch (Diesel only), Overhead Console
1615AInstrument Cluster, Hi-beam Headlamps
17Not Used
18Not Used
1910AWasher Pump, Wiper Run/Park Relay Coil, Wiper Hi/LO Relay Coil, Washer Pump Relay Coil
2015AStarter Motor Relay Coil, PCM (Gasoline only)
21Not Used
2210AAir Bag Module, Passenger Air BagActivation Switch, Blower Motor Relay Coil
2310AElectronic Flasher
2410ABlend Door Actuator, Trailer Tow Battery Charge Relay Coil
255A4-Wheel Anti-Lock Brake System (4WABS)Module
26Not Used
2710AIgnition Run Power Feed (Customer Access)
2810AGeneric Electronic Module (GEM), Powertrain Control Module (PCM),Anti-lock Brake System (ABS) Module,Brake Shift Interlock, Speed Control
295AInstrument Cluster (Charge and Airbag Warning Lamps)
3030ABrake Shift Interlock, DRL Relay Coil, Speed Control Module, Backup Lamps, Trailer Tow Backup Lamp Relay Coil, Electronic Shift On The Fly Hub Lock Solenoid
31Not Used
Relay 1Interior Lamp Relay
Relay 2Not Used
Relay 3Horn
Relay 4Power Window One Touch Down Relay
Relay 5Accessory Delay Relay

Tom Smith is a passionate car mechanic and automotive enthusiast, specializing in the intricate world of car fuse boxes. With years of hands-on experience under the hood, he has earned a reputation as a reliable expert in his field. As the founder and content creator of the popular blog website 'carsfuse.com,' Tom has dedicated himself to sharing his extensive knowledge of car fuse boxes and electrical systems with the world.

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