Ford F-150 1998 Fuse Replacement
Having an electrical issue? It could be a blown fuse — an easy fix you can do yourself.
Follow the steps below to find and replace the fuse:
Step 1: Find the Fuse Box
In your Ford F-150 1998, the interior fuse box is typically located under the dashboard on the driver's side. Some vehicles also have an additional fuse box in the engine compartment. Check your owner's manual or the fuse box cover for the exact location.
Step 2: Identify the Corresponding Fuse
Below is the complete fuse list for your vehicle. Find the circuit that isn't working and note the fuse number and amperage.
Passenger compartment Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Flasher Relay | 15 |
| 2 | Instrument Cluster | 5 |
| 3 | Cigar Lighter | 25 |
| 4 | Park Lamp Relay, Headlamp Relay, Autolamp Module Remote Anti-Theft Personality (RAP) Module, Power Mirror Switch | 5 |
| 5 | Digital Transmission Range (DTR) Sensor (A/T), Backup Lamp Switch (M/T), Daytime Running Lights (DRL) Module, Speed Control Servo/Amplifier Assembly, Heater-A/C Control Assembly, Blend Door Actuator | 15 |
| 6 | Shift Lock Actuator, Generic Electronic Module (GEM), Rear Air Suspension (RAS) Module | 5 |
| 7 | Not Used | |
| 8 | Radio, Main Light Switch, Remote Anti-Theft Personality (RAP) Module | 5 |
| 9 | Not Used | |
| 10 | Not Used | |
| 11 | Washer Pump Relay, Wiper Run/Park Relay, Wiper Hi/LO Relay, Windshield Wiper Motor | 30 |
| 12 | Data Link Connector (DLC) | 5 |
| 13 | Rear Anti-Lock Brake System (RABS) Module, Brake On/Off (BOO) Switch, Brake Pressure Switch | 15 |
| 14 | Batteiy Saver Relay, Interior Lamp Relay | 15 |
| 15 | Generic Electronic Module (GEM) | 5 |
| 16 | Instrument Cluster (W/O DRL), Daytime Running Lamps (DRL) Module, Hi-Beam Headlamps (Power supplied through Multi-Function Switch) | 20 |
| 17 | Not Used | |
| 18 | Park Lamp Relay, Trailer Electronic Brake Controller, Main Light Switch, Trailer Tow Run Relay, Front Park/Turn Lamps, License Lamps, Stop/Park/Turn Lamps, Tail/Side Marker Lamps (Power supplied through Main Light Switch) | 5 |
| 19 | Instrument Cluster, Air Bag Diagnostic Monitor | 10 |
| 20 | Powertrain Control Module (PCM), Generic Electronic Module (GEM)/Central Timer Module (CTM) | 5 |
| 21 | Clutch Pedal Position (CPP) Switch (W/O RAP), Starter Interrupt Relay (W/RAP) | 15 |
| 22 | Air Bag Diagnostic Monitor, Passive De-Activation (PAD) Module | 10 |
| 23 | Trailer tow Batteiy Charge Relay, 4X4 Hub Solenoid, 4X2 Hub Solenoid, Flasher Relay, Shift on the Fly Relay | 10 |
| 24 | Blower Relay | 10 |
| 25 | 4 Wheel Anti-Lock Brake System (4WABS) Module, 4WABS Relay | 5 |
| 26 | Daytime Running Lamps (DRL) Module, Right Headlamp | 10 |
| 27 | Main Light Switch, Fog Lamp Relay | 5 |
| 28 | Left Headlamp | 10 |
| 29 | Autolamp Module, Instrument Cluster, Transmission Control Switch (TCS), Brake Warning Resistor/Diode Assembly (W/RABS) | 5 |
| 30 | Radio Noise Capacitor, Ignition Coil, PCM Power Diode | 30 |
| 31 | Not Used | |
| Relay1 | Interior Lamp Relay | |
| Relay2 | Batteiy Saver Relay | |
| NotUsed | Not Used | |
| Relay4 | One Touch Down Relay | |
| Relay5 | ACC Delay Relay |
Power distribution box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 4 | Rear Air Suspension (RAS) | 15 |
| 5 | Horn Relay | 20 |
| 6 | Radio, Premium Sound Amplifier, CD Changer | 15 |
| 7 | Main Light Switch, Park Lamp Relay | 15 |
| 8 | Main Light Switch, Headlamp Relay, Multi-Function Switch | 30 |
| 9 | Daytime Running Lamps (DRL) Module, Fog Lamp Relay | 15 |
| 10 | Auxiliary Power Socket | 25 |
| 11 | Not Used | |
| 12 | Not Used | |
| 13 | Not Used | |
| 14 | 4 Wheel Anti-Lock Brake System (4WABS) Module/Ignition Switch (W/RABS Only) | 60 |
| 15 | Rear Air Suspension Compressor | 50 |
| 16 | Trailer Tow Batteiy Charge Relay, Engine Fuse Module (Fuse 2) | 40 |
| 17 | Shift on the Fly Relay, Transfer Case Shift Relay | 30 |
| 18 | Power Seat Control Switch | 30 |
| 19 | Fuel Pump Relay | 20 |
| 1 | Trailer Tow Running Lamp Relay, Trailer Tow Backup Lamp Relay | 20 |
| 2 | Air Bag Diagnostic Monitor | 10 |
| 3 | All Unlock Relay, All Lock Relay, Driver Unlock Relay, LH Power Door Lock Switch, RH Power Door Lock Switch | 15 |
| 20 | Ignition Switch | 50 |
| 21 | Ignition Switch | 50 |
| 22 | Junction Box Fuse/Relay Panel Batteiy Feed | 50 |
| 23 | Blower Relay | 40 |
| 24 | PCM Power Relay, Engine Fuse Module (Fuse 1) | 30 |
| 25 | Junction Box Fuse/Relay Panel, ACC Delay Relay | 30 |
| 26 | Not Used | |
| 27 | Not Used | |
| 28 | Trailer Electronic Brake Controller | 30 |
| 29 | Not Used |
Step 3: Check the Fuse
Use the plastic fuse puller, typically found in the fuse box, to remove the fuse. Hold it up to a light source. If the metal filament inside is broken or charred, the fuse is bad and needs to be replaced.
Step 4: How to Get a Replacement
You can buy a replacement fuse at any auto parts store. Make sure you match the **amperage (A)** and **physical size** of the fuse exactly. For example, if you need a 20A fuse, get a 20A fuse.
Step 5: Replace the Fuse
Gently press the new fuse into the empty slot. You should feel a slight click when it's securely in place. Test the affected circuit to confirm it's working again.
What Now?
Fuse Was Blown — What to Buy
Ask at any auto parts store (AutoZone, O'Reilly, Advance Auto) for a blade fuse with the same amperage printed on the old one (e.g., 10A, 15A, 20A). Also match the physical size — mini (most modern cars), standard, or maxi. Replacement fuses cost under $5 and most stores sell assorted packs.
Fuse Looks Fine — Other Causes
If the fuse is intact, the problem isn't a blown fuse. Common alternatives include a bad relay (a click-sized electrical switch), a faulty wiring connection, or a failed component (motor, switch, module). At this point, a mechanic's diagnostic is the most reliable next step.
Frequently Asked Questions
What happens if I put in the wrong amperage fuse?
Higher amperage fuses won't protect the circuit and can cause wiring damage or fire. Lower amperage fuses will blow again immediately. Always match the exact amperage.
Why does my fuse keep blowing?
A repeatedly blown fuse indicates an underlying short circuit or overload. Replacing it again won't fix the root cause — consult a mechanic.
Do I need any tools?
Most cars come with a plastic fuse puller in the fuse box lid. If not, fine-tip needle-nose pliers work. A small flashlight helps.
How do I know what size fuse to buy?
Match the amperage printed on the old fuse (e.g., 10A, 15A, 20A) and the physical blade size (mini, standard, maxi). Auto parts stores carry assorted packs.