Ford Super Duty Fuse Box Diagram and Location (1999-2003)

The first-generation Ford F-Series Super Duty, before receiving its 2005 facelift, was produced from 1999 to 2003. Known for its durability, powerful engine options, and impressive towing capacity, the F-250, F-350, F-450, and F-550 became a top choice for commercial fleets, contractors, and heavy-duty truck enthusiasts.

In this article, you will find fuse box diagrams for Ford F-250, F-350, F-450, and F-550 models produced between 1999 and 2003, covering years 1999, 2000, 2001, 2002, and 2003. These diagrams provide essential insights into the fuse layout, helping truck owners, mechanics, and fleet operators locate and understand the function of each fuse and relay.

What’s Included:

Fuse Box Diagrams – Clear and detailed visuals to help identify fuses, relays, and circuit breakers.
Fuse Panel Locations – Step-by-step guidance on where to find the fuse panels inside the Ford Super Duty trucks.
Fuse Assignments – Comprehensive descriptions of each fuse and relay function for accurate diagnostics and troubleshooting.

Whether you’re searching for the fuse panel layout, replacing a blown fuse, or diagnosing an electrical issue, this guide is an essential resource. It ensures that your Ford F-Series Super Duty electrical system remains functional and reliable for work, towing, and heavy-duty applications.

Keep your Ford F-250, F-350, F-450, and F-550 (1999–2003) in peak condition with this detailed fuse box, fuse panel, and relay guide!

The cigar lighter (power outlet) fuses in the Ford F-250 / F-350 / F-450 / F-550 vary by model year:

For 1999–2001:
- Fuse №3: Cigar Lighter in the Instrument Panel Fuse Box
- Fuse №10: Power Point in the Engine Compartment Fuse Box
For 2002–2003:
- Fuse №4: Power Point – Instrument Panel in the Instrument Panel Fuse Box
- Fuse №12: Cigar Lighter in the Instrument Panel Fuse Box

What’s Included

Fuse box locations

Passenger compartment

The fuse panel is located below and to the left of the steering wheel by the brake pedal.

1999-2001

The location of the fuses in the passenger compartment: Ford F-250 / F-350 / F-450 / F-550 (1997, 1998, 1999, 2000, 2001)

2002-2003

Engine compartment

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.

Fuse box diagrams

1999, 2000

Passenger compartment

Interior fuse box diagram: Ford F-250 / F-350 / F-450 / F-550 (2000)

Assignment of the fuses in the Passenger compartment (1999, 2000)

№	Amp Rating	Description
1	20A	Turn/Hazard Lamps
2	10A	Airbag Module
3	20A	Cigar Lighter, Data Link Connector
4	10A	Glove Box Lamp, Map Lamps, Power Mirrors, Underhood Lamp
5	—	Not Used
6	—	Not Used
7	5A	Power Window/Lock Swatch Illumination
8	5A	Radio, Headlamp Switch Illumination
9	—	Not Used
10	15A	Dual Fuel Tanks
11	30A	Wiper Motor, 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, Speed Control
14	10A	Dome Lamp, Cargo Lamp, Courtesy Lamps, Running Board Lamps
15	5A	Stop Lamp Switch (Logic): Generic Electronic Module (GEM), Powertrain Control Module (PCM), Four Wheel Anti-lock Brake System (4WABS) Module, Brake Shift Interlock, Cluster and PCM Keep Alive Memory
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, Diesel PCM via Clutch
20	15A	Starter Motor Relay Coil, Clutch Switch
21	—	Not Used
22	10A	Air Bag Module, Passenger Air Bag Activation/Deactivation Switch, Blower Motor Relay Coil
23	—	Not Used
24	10A	A/C Clutch, Blend Door Actuator, Trailer Tow Battery Charge Relay Coil, Four Wheel Anti-Lock Brake System (4WABS), Turn Signal
25	—	Not Used
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, Vacuum Pump Motor
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	—	Accessoiy Delay Relay

Engine compartment

Under-hood fuse box diagram: Ford F-250 / F-350 / F-450 / F-550 (2000)

Assignment of the fuses in the Power distribution box (1999, 2000)

№	Amp Rating	Description
1	7.5A *	Trailer Tow Left Stop/Turn Lamp
2	10 A*	Washer Pump
3	7.5 A*	Trailer Tow Right Stop/Turn Lamp
4	20 A*	Trailer Tow Backup Lamps, Trailer Tow Park Lamps
5	20A* (Gasoline only) 5A* (Diesel only)	Gasoline only-PCM, Fuel Pump Relay Coil, Mass Air Flow Sensor, Fuel Injectors Diesel only-Dual Alternator “A” Field
6	10 A*	Gasoline only-A/C (CASS) Diesel only-Single or Dual Alternator “A” Field, Regulator
7	20A* (Gasoline only) 5A* (Diesel only)	Gasoline only-Vapor Management Valve, HEGO Sensors, Intake Manifold Communication Control, EVR Solenoid, PCM, Canister Vent Solenoid Diesel only-Dual Alternator “A” Field
8	15 A*	Trailer Tow Electronic Brake Illumination, Park Lamps, Trailer Tow Park Lamp Relay Coil
9	10 A*	Left Headlamp (Low Beam)
10	20 A*	Power Point
11	10 A*	Right Headlamp (Low Beam)
12	15 A*	Daytime Running Lamps (DRL) Resistor
13	30A**	Multi-function Switch, Headlamps
14	60A**	Anti-Lock Brake System
15	—	Not Used
16	30A**	Trailer Tow Batteiy 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**	Junction Box Battery Feed
23	40A**	Blower Motor
24	30A (Gasoline only) 20A (Diesel only)	PCM Power
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	—	A/C CASS (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	—	A/C Clutch Diode
37	—	PCM Diode
38	—	Trailer Tow Backup Lamp Relay
39	—	Trailer Tow Batteiy Charge Relay
40	—	Electronic Shift On The Fly Relay #1
41	—	Electronic Shift On The Fly Relay #2
		* Mini Fuses Maxi Fuses * Circuit Breaker

2001

Passenger compartment

Assignment of the fuses in the Passenger compartment (2001)

№	Amp Rating	Description
1	20A	Turn/Hazard Lamps
2	—	Not Used
3	20A	Cigar Lighter, Data Link Connector
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	15A	Dual Fuel Tanks
11	30A	Wiper Motor, Wiper Run/Park Relay Coil, Wiper Ili/LO Relay Coil, Washer Pump Relay Coil
12	15A	Horn
13	20A	Stop Lamps, Center Iligh-mount Stop Lamp, Trailer Tow Stop Lamp, Speed Control
14	10A	Dome Lamp, Cargo Lamp, Courtesy Lamps, Running Board Lamps
15	5A	Stop Lamp Switch (Logic): Generic Electronic Module (GEM), Powertrain Control Module (PCM), Four Wheel Anti-lock Brake System (4WABS) Module, Brake Shift Interlock, Cluster and PCM Keep Alive Memory
16	15A	Instrument Cluster, Hi-beam Headlamps
17	—	Not Used
18	5A	Audio
19	10A	Auxiliary Pow r ertrain Control Module (APCM) (Diesel only), Instrument Cluster, GEM Module, Overdrive Cancel Switch, Idle Validation Switch (Diesel only), Overhead Console, Diesel PCM via Clutch
20	15A	Starter Motor Relay Coil, Clutch Switch
21	—	Not Used
22	10A	Passenger Air Bag Activation/Deactivation Switch, Blow r er Motor Relay Coil
23	10A	Air Bag Module
24	10A	A/C Clutch, Blend Door Actuator, Trailer Tow Battery Charge Relay Coil, Four Wheel Anti-Lock Brake System (4WABS), Turn Signal
25	—	Not Used
26	—	Not Used
27	10A	Ignition Run Power Feed (Customer Access)
28	15A	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, Vacuum Pump Motor
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	5A	Fog Lamp Switch
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

Under-hood fuse box diagram: Ford F-250 / F-350 / F-450 / F-550 (2001)

Assignment of the fuses in the Power distribution box (2001)

№	Amp Rating	Description
1	7.5A *	Trailer Tow Left Stop/Turn Lamp
2	10 A*	Washer Pump
3	7.5 A*	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, Fuel Pump Relay Coil, Mass Air Flow Sensor, Fuel Injectors Diesel only-Dual Alternator “A” Field
6	10 A*	Gasoline only-A/C (CASS) Diesel only-Single or Dual Alternator “A” Field, Regulator
7	20A* (Gasoline only) 5A* (Diesel only)	Gasoline only-Vapor Management 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	10 A*	Left Headlamp (Low Beam)
10	20A*	Power Point
11	10 A*	Right Headlamp (Low Beam)
12	15A*	Daytime Running Lamps (DRL) Resistor, Fog Lamps
13	30A**	Multi-function Switch, Headlamps
14	60A**	Anti-Lock Brake System
15	30A**	Heated Seats
16	30A**	Trailer Tow Battery Charge
17	30A**	Electronic Shift On The Fly Relay, Transfer Case Shift Motor
18	30A**	Power Seat, Adjustable Pedals
19	20A**	Fuel Pump Motor, PCM
20	50A**	Ignition Switch (B4 & B5)
21	50A**	Ignition Switch (B1 & B3)
22	50A**	Junction Box Battery Feed
23	40A**	Blower Motor
24	30A (Gasoline only) 20A (Diesel only)	PCM Power
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 Pow er Relay
31	—	Blow r er Motor Relay
32	—	A/C CASS (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	—	A/C Clutch Diode
37	—	PCM Diode
38	—	Trailer Tow Backup Lamp Relay
39	—	Trailer Tow Battery Charge Relay
40	—	Electronic Shift On The Fly Relay #1
41	—	Electronic Shift On The Fly Relay #2
		* Mini Fuses Maxi Fuses * Circuit Breaker

2002

Passenger compartment

Assignment of the fuses in the Passenger compartment / Power distribution box (2002)

№	Amp Rating	Description
1	15 A*	Adjustable pedals
2	—	Not used
3	—	Not used
4	20 A*	Power point – instrument panel
5	—	Not used
6	20 A*	Trailer tow turn/stop relay
7	30A*	High beam headlamps/Flash to pass
8	—	Not used
9	—	Not used
10	10 A*	A/C clutch
11	20 A*	Radio (main)
12	20 A*	Cigar lighter / OBD II
13	5A*	Power mirrors/switches
14	15 A*	Daytime running lamps (DRL)
15	—	Not used
16	—	Not used
17	15 A*	Exterior lamps
18	20 A*	Turn lamps/Brake on-off swatch (high)
19	10 A*	Body security module/4×4 module
20	—	Not used
21	—	Not used
22	20 A*	Engine control
23	20 A*	Engine control (gasoline engine only)
24	15 A*	Not used (spare)
25	10 A*	4-Wheel Anti-lock Brake System (4WABS) module
26	10 A*	Air bags
27	15 A*	Ignition switch Run feed
28	10 A*	EATC module/Front blower relay coil
29	10 A*	Customer access
30	15 A*	Highbeam headlamps
31	15 A*	Clutch interlock switch (manual transmissions only), Transmission range sensor (automatic transmissions only) then to starter relay coil (all transmissions)
32	5A*	Radio (start)
33	15 A*	Front wiper
34	10 A*	Brake on-off switch
35	10 A*	Instrument cluster
36	10 A*	PCM Keep-Alive
37	15 A*	Horn
38	20 A*	Trailer tow park lamps and backup lamps
39	—	Not used
40	20 A*	Fuel pump
41	10 A*	Instrument cluster
42	15 A*	Delayed accessory
43	10 A*	Fog lamps
44	—	Not used
45	10 A*	Ignition switch Run/Start feed
46	10 A*	Left-hand lowbeam
47	10 A*	Right-hand lowbeam
48	—	Not used
101	30A**	Trailer tow electric brake
102	30A**	Door locks/Body security module
103	50A**	Ignition switch
104	—	Not used
105	30A**	Injector driver module (Diesel engine only)
106	30A**	Front wiper main
107	40A**	Front blower motor
108	—	Not used
109	30A**	Heated seats
110	50A**	Ignition switch
111	30A**	4WD/Shift on the fly
112	30A**	Left-hand power seats
113	30A**	Starter motor
114	30A**	Right-hand power seats
115	20A**	Trailer tow battery charge
116	30A**	Ignition switch
601	30A CB***	Door window motors
602	60A**	4WABS module
210	—	Not used
211	—	Not used
212	—	Not used
301	—	Front blower motor relay
302	—	Powertrain (EEC) relay
303	—	Injector driver module relay (Diesel engine only)
304	—	Not used
305	—	Trailer tow battery charge relay
306	—	Delayed accessory relay
307	—	Starter relay
		* Mini Fuses Maxi Fuses * Circuit Breaker

2003

Passenger compartment

Assignment of the fuses in the Passenger compartment / Power distribution box (2003)

№	Amp Rating	Description
1	15 A*	Adjustable pedals
2	20 A*	Not used
3	20 A*	Not used
4	20 A*	Power point – instrument panel
5	20 A*	Not used
6	20 A*	Trailer tow turn/stop relay
7	30 A*	High beam headlamps/Flash to pass
8	—	Not used
9	20 A*	Not used
10	10 A*	A/C clutch
11	20 A*	Radio (main)
12	20 A*	Cigar lighter/OBD II
13	5A*	Power mirrors/switches
14	15 A*	Daytime running lamps (DRL)
15	10 A*	Not used
16	15 A*	Not used
17	15 A*	Exterior lamps
18	20 A*	Turn lamps/Brake on-off switch (high)
19	10 A*	Body security module/4×4 module
20	—	Not used
21	25 A*	Not used
22	20 A*	Engine control
23	20 A*	Engine control (gasoline engine only)
24	15 A*	Not used
25	10 A*	4-Wheel Anti-lock Brake System (4WABS) module
26	10 A*	Air bags
27	15 A*	Ignition switch Run feed
28	10 A*	EATC module/Front blower relay coil
29	10 A*	Customer access
30	15 A*	Highbeam headlamps
31	15A*	Clutch interlock switch (manual transmissions only), Transmission range sensor (automatic transmissions only) then to starter relay coil (all transmissions)
32	5A*	Radio (start)
33	15 A*	Front wiper
34	10 A*	Brake on-off switch
35	10 A*	Instrument cluster
36	10 A*	PCM Keep-Alive
37	15 A*	Horn
38	20 A*	Trailer tow park lamps and backup lamps
39	—	Not used
40	20 A*	Fuel pump
41	10 A*	Instrument cluster
42	15 A*	Delayed accessory
43	10 A*	Fog lamps
44	10 A*	Not used
45	10 A*	Ignition switch Run/Start feed
46	10 A*	Left-hand lowbeam
47	10 A*	Right-hand lowbeam
48	10 A*	Not used
101	30A**	Trailer tow electric brake
102	30A**	Door locks/Body security module
103	50A**	Ignition switch
104	40A**	Not used
105	30A**	Injector driver module (Diesel engine only)
106	30A**	Front wiper main
107	40A**	Front blower motor
108	40A**	Not used
109	30A**	Heated seats
110	50A**	Ignition switch
111	30A**	4WD/Shift on the fly
112	30A**	Left-hand power seats
113	30A**	Starter motor
114	30A**	Right-hand power seats
115	20A**	Trailer tow battery charge
116	30A**	Ignition switch
601	30A CB***	Door window motors
602	60A**	4WABS module
210	—	Not used
211	—	Not used
212	—	Not used
301	—	Front blower motor relay
302	—	Powertrain (EEC) relay
303	—	Injector driver module relay (Diesel engine only)
304	—	Not used
305	—	Trailer tow battery charge relay
306	—	Delayed accessory relay
307	—	Starter relay
		* Mini Fuses Maxi Fuses * Circuit Breaker