Ford F-550 1999 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is located below and to the left of the steering wheel by the brake pedal.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 20A | Electronic Flasher |
| 2 | 5A | Instrument Cluster, Powertrain Control Module (PCM) Keep Alive Memory |
| 3 | 20A | Cigar Lighter, OBDII |
| 4 | 10A | Glove Box Lamp, Map Lamps, Power Mirrors, Underhood Lamp |
| 5 | - | Not used |
| 6 | - | Not used |
| 7 | 5A | Power Window Lock Switch Illumination |
| 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 |
| 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 |
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 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 |
| 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 |
| 27 |
- (Gasoline only) 30A (Diesel only) |
Gasoline only-Not Used Diesel only-Injector Driver Module |
| 28 | 30A | Trailer Tow Electronic Brake Controller |
| 29 | 20A | Radio |
| 30 | - | PCM Power Relay |
| 31 | - | Blower Motor Relay |
| 32 | - | Two Speed Fuel Pump Relay (Gasoline only), Injector Driver Module Power Relay (Diesel only) |
| 33 | - | Washer Pump Relay |
| 34 | - | Windshield Wiper Park/Run Relay |
| 35 | - | Windshield Wiper HI/LO Relay |
| 36 | - | Not used |
| 37 | - | PCM Relay Diode |
| 38 | - | Trailer Tow Backup Lamp Relay |
| 39 | - | Trailer Tow Battery Charge Relay |
| 40 | - | Electronic Shift On The Fly Relay #1, Electronic Shift On The Fly Relay #2 |
