Ford Expedition 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 Expedition 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, Overhead Trip Computer (OTC) Module | 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, Daytime Running Lamps (DRL) Module, Speed Control Servo/Amplifier Assembly, Heater-A/C Control Assembly, Blend Door Actuator, Electronic Variable Orifice (EVO) Module | 15 |
| 6 | Shift Lock Actuator, Generic Electronic Module (GEM), 4 Wheel Air Suspension (4WAS) Module, Compass Sensor, Steering Wheel Rotation Sensor, Heated Grid Relay, Overhead Trip Computer (OTC) Module | 5 |
| 7 | Auxiliary A/C Relay, Console Blower Motor | 5 |
| 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, Rear Wiper Pump Relay | 30 |
| 12 | Data Link Connector (DLC) | 5 |
| 13 | Brake On/Off (BOO) Switch, Brake Pressure Switch | 15 |
| 14 | Battery Saver Relay, Interior Lamp Relay | 15 |
| 15 | Generic Electronic Module (GEM), Passive Anti-Theft System (PATS) Module | 5 |
| 16 | Instrument Cluster (W/O DRL), Daytime Running Lamps (DRL) Module, Hi-Beam Headlamps (Power supplied through Multi-Function Switch) | 20 |
| 17 | Heated Backlight Switch, Left Power/Heated Signal Mirror, Right Power/Heated Signal Mirror | 10 |
| 18 | Main Light Switch, Generic Electronic Module (GEM), Instrument Illumination (Power supplied through Main Light Switch) | 5 |
| 19 | Instrument Cluster, Air Bag Diagnostic Monitor | 10 |
| 20 | 4 Wheel Air Suspension (4WAS), Generic Electronic Module (GEM) | 5 |
| 21 | Digital Transmission Range (DTR) Sensor, Junction Box Fuse/Relay Panel (Fuse 20) | 15 |
| 22 | Air Bag Diagnostic Monitor | 10 |
| 23 | Trailer Tow Battery Charge Relay, 4X4 Center Axle Disconnect solenoid, 4X2 Center Axle Disconnect Solenoid, Function Selector Switch, Rear Integrated Control Panel, Recirculation Vacuum Solenoid, Auxiliary A/C Mode Acturator, Auxiliary A/C Control Module | 10 |
| 24 | Function Selector Swatch | 10 |
| 25 | 4 Wheel Anti-Lock Brake System (4WABS) Module, 4WABS Relay | 5 |
| 26 | Daytime Running Lamps (DRL) Module, Right Headlamp (Power supplied through Multi-Function Switch) | 10 |
| 27 | Main Light Switch, Fog Lamp Relay | 5 |
| 28 | Left Headlamp | 10 |
| 29 | Autolamp Module, Instrument Cluster, Transmission Control Switch (TCS) | 5 |
| 30 | Radio Noise Capacitor, Ignition Coil, PCM Power Diode, Coil On Plugs | 30 |
| 31 | Not Used |
Power distribution box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 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’s Unlock Relay | 30 |
| 4 | Air Suspension Sendee Switch | 15 |
| 5 | Horn Relay | 20 |
| 6 | Radio, Premium Sound Amplifier, CD Changer, Rear Integrated Control Panel, Sub-Woofer Power (Fuse 3 & Fuse 5) | 30 |
| 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 | I/P Auxiliary Power Socket | 25 |
| 11 | Console Auxiliary Power Socket | 25 |
| 12 | Rear Wiper Up Motor Relay, Rear Wiper Down Motor Relay | 10 |
| 13 | Auxiliary A/C Relay | 30 |
| 14 | 4 Wheel Anti-Lock Brake System (4WABS) Module | 60 |
| 15 | Air Suspension Solid State Compressor Relay | 50 |
| 16 | Trailer Tow Battery Charge Relay, Engine Fuse Module (Fuse 2) | 40 |
| 17 | Shift on the Fly Relay, Transfer Case Shift relay | 30 |
| 18 | Power Seat Control Swatch | 30 |
| 19 | Fuel Pump Relay | 20 |
| 20 | Ignition Switch (B4 & B5) | 50 |
| 21 | Ignition Switch (B1 & B3) | 50 |
| 22 | Junction Box Fuse/Relay Panel Battery Feed | 50 |
| 23 | I/P 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 | Junction Box Fuse/Relay Panel, Heated Grid Relay | 40 |
| 28 | Trailer Electronic Brake Controller | 30 |
| 29 | Flip Window Relay, Hybrid Cooling Fan Relay | 30 |
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.