If you are trying to find a blown fuse on a 2002 Ford F-150, the first thing to know is that the truck uses two main fuse locations. One is inside the passenger compartment, while the other is the power distribution box in the engine compartment.
This guide helps you identify the correct fuse by number, amperage, and circuit instead of simply replacing fuses at random. It also includes a quick way to narrow down the fuse when a specific electrical system stops working.
Where Are the Fuse Boxes on a 2002 Ford F-150?
The 2002 F-150 has two main fuse panels:
- Passenger compartment fuse panel: located below and to the left of the steering wheel, near the brake pedal.
- Power distribution box: located in the engine compartment.
The two boxes do different jobs, so finding the correct location is important before checking a fuse.
Passenger Compartment Fuse Panel
The interior fuse panel contains many of the circuits used by the cabin, lighting, instruments, controls, and other electrical equipment.
| Fuse | Rating | Circuit |
|---|---|---|
| 1 | 15A | Audio |
| 2 | 5A | PCM and instrument cluster |
| 3 | 20A | Cigarette lighter and data link connector |
| 4 | 5A | Power mirror switch and mirror turn-signal relays |
| 5 | 15A | Speed control, reverse lamp, climate mode switch and related circuits |
| 6 | 5A | Cluster, brake-shift interlock and GEM |
| 7 | — | Not used |
| 8 | 5A | Radio, remote entry and GEM |
| 9 | — | Not used |
| 10 | — | Not used |
| 11 | 30A | Windshield wiper and washer circuits |
| 12 | — | Not used |
| 13 | 20A | Stop lamps and turn/hazard flasher |
| 14 | 15A | Battery saver and interior lamp relay |
| 15 | 5A | Stop lamp switch, speed control, brake-shift interlock and GEM |
| 16 | 20A | High-beam headlamps |
| 17 | — | Not used |
| 18 | 5A | Instrument illumination and dimmer power |
| 19 | — | Not used |
| 20 | 5A | Audio, GEM, PCM and transmission range sensor |
| 21 | 15A | Transmission range sensor, clutch switch and starter relay |
| 22 | 10A | Airbag module and passenger airbag deactivation module |
| 23 | 10A | Trailer charge relay, 4x4 circuits, heated seats and related equipment |
| 24 | 10A | Function selector switch |
| 25 | — | Not used |
| 26 | 10A | Right low-beam headlamp |
| 27 | 5A | Foglamp relay and indicator |
| 28 | 10A | Left low-beam headlamp |
| 29 | 5A | Autolamp module, overdrive switch, security module and belt minder |
| 30 | 30A | Anti-theft transceiver, ignition coils, PCM relay and related circuits |
| 31 | — | Not used |
Power Distribution Box Under the Hood
The second fuse box is in the engine compartment. It contains mini fuses, higher-current fuses, relays, and other protection devices.
| Fuse | Rating | Circuit |
|---|---|---|
| 1 | 20A | Power point |
| 2 | 30A | Powertrain Control Module |
| 3 | 30A | Main light switch and headlamp circuits |
| 5 | 20A | Trailer backup and park lamps |
| 6 | 15A | Park lamp relay |
| 7 | 20A | Horn |
| 8 | 15A | Power door locks and security module |
| 9 | 15A | Daytime running lamps and fog lamps |
| 10 | 20A | Fuel pump |
| 11 | 20A | Alternator field |
| 12 | 20A | Rear auxiliary power point |
| 13 | 15A | A/C clutch |
| 15 | 10A | Running board lamps |
| 18 | 15A | PCM, fuel injectors, fuel pump relay and MAF sensor |
| 19 | 10A | Trailer right stop and turn lamp |
| 20 | 10A | Trailer left stop and turn lamp |
| 23 | 15A | HEGO sensor and automatic transmission |
Higher-Current Fuses
The under-hood box also contains larger fuses that protect major electrical circuits. These should not be confused with the smaller passenger-compartment fuses.
| Fuse | Rating | Main circuit |
|---|---|---|
| 101 | 30A | Trailer tow battery charge |
| 102 | 50A | Four-wheel anti-lock brake module |
| 103 | 50A | Central Junction Box |
| 104 | 30A | 4x4 shift motor and clutch |
| 105 | 40A | Climate-control front blower |
| 108 | 30A | Trailer electric brake |
| 110 | 30A | Accessory delay relay |
| 111 | 40A | Ignition switch battery feed |
| 112 | 30A | Driver power seat and adjustable pedals |
| 113 | 40A | Ignition switch run/accessory circuits |
| 115 | 20A | Power door locks |
| 118 | 30A | Heated seats |
2002 F-150 Fuse Location by Problem
If you arrived here because something stopped working, you may not need to study the entire diagram. Start with the circuit that matches the symptom.
| Problem | Fuse to check first |
|---|---|
| Cigarette lighter / 12V outlet | Passenger panel fuse 3 — 20A |
| Radio / audio | Passenger panel fuses 1, 8 and 20 |
| Windshield wipers | Passenger panel fuse 11 — 30A |
| Brake lights | Passenger panel fuse 13 — 20A |
| High beams | Passenger panel fuse 16 — 20A |
| Right low beam | Passenger panel fuse 26 — 10A |
| Left low beam | Passenger panel fuse 28 — 10A |
| Horn | Under-hood fuse 7 — 20A |
| Fuel pump circuit | Under-hood fuse 10 — 20A |
| A/C clutch | Under-hood fuse 13 — 15A |
| Power door locks | Under-hood fuse 8 — 15A |
How to Check a Fuse Correctly
A fuse should not be replaced simply because an electrical component has stopped working. First determine whether the fuse is actually open.
- Turn the vehicle and the affected electrical system off.
- Locate the correct fuse panel.
- Remove the fuse using a fuse puller or suitable tool.
- Inspect the metal element inside the fuse.
- If available, confirm the fuse with a multimeter or test light.
- Replace a blown fuse only with another fuse of the same rating.
For example, if the original fuse is rated at 20A, installing a 30A fuse is not a safe repair. The fuse is designed to protect the wiring and electrical circuit.
What If the Replacement Fuse Blows Again?
If the new fuse fails immediately or shortly after installation, replacing it repeatedly is not a proper solution.
A recurring blown fuse can indicate a short circuit, damaged wiring, a failed electrical component, or another problem in the protected circuit. In that situation, the cause should be diagnosed before installing another fuse.
Why the Fuse Number May Not Match Another F-150 Chart
This is one of the most important details when using an online fuse diagram.
Do not automatically use a fuse chart from a different model year. Fuse locations and circuit assignments can change between generations and even between different configurations.
The 2002 F-150 diagram should therefore be matched to the vehicle's model year before replacing a fuse. Optional equipment can also affect which fuse positions are actually used.
Does a Blown Fuse Always Mean the Fuse Is the Problem?
No. A blown fuse is often the result of an electrical problem rather than the original cause.
For example, if a fuse protecting a motor or lighting circuit repeatedly blows, installing another fuse may only restore the circuit temporarily. The underlying component or wiring should be inspected.
This is particularly important when the fuse blows immediately after replacement.
Quick Reference
For the 2002 Ford F-150, remember these three points:
- The passenger fuse panel is inside the truck near the driver's side and brake pedal.
- The power distribution box is located in the engine compartment.
- Always replace a fuse with the same amperage rating specified for that circuit.
Final Thoughts
The 2002 Ford F-150 fuse box diagram is most useful when it is combined with the location of the fuse and the symptom you are trying to diagnose. Instead of checking every fuse, start with the electrical system that has failed and then verify its fuse, relay, wiring, and component if the fuse is good.
If the same fuse continues to blow after replacement, stop replacing it repeatedly and investigate the circuit for an electrical fault.