Ford Expedition 1999 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 1999, 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 | Audio | 25 |
| 2 | Overhead Trip Computer, Electronic Automatic Temperature Control (EATC), Powertrain Control Module (PCM), Cluster | 5 |
| 3 | Cigar Lighter, OBD-II Scan Tool Connector | 20 |
| 4 | Autolamp Module, Remote Entry Module, Mirrors, Air Suspension Switch | 15 |
| 5 | AC Clutch Relay, Speed Control Module, Reverse Lamp, EVO Module, Climate Mode Switch (Front Blower Relay), Daytime Running Lamp Relay | 15 |
| 6 | Cluster, Overhead Trip Computer, Compass, Brake Shift Interlock Solenoid, Air Suspension Module, GEM Module, EVO Steering Sensor | 5 |
| 7 | Aux A/C Blower Relay, Console Blower | 5 |
| 8 | Radio, Remote Entry Module, GEM Module | 5 |
| 9 | Not Used | |
| 10 | Not Used | |
| 11 | Front Washer Pump Relay, Wiper Run/Park Relay, Wiper Hi/LO Relay, Windshield Wiper Motor, Rear Washer Pump Relay | 30 |
| 12 | Not Used | |
| 13 | Stop Lamp Switch (Lamps), Turn/Hazard Flasher, Speed Control Module | 20 |
| 14 | Rear Wipers, Running Board Lamps, Battery Saver Relay, Interior Lamp Relay, Accessoiy Delay Relay (Power Windows) | 15 |
| 15 | Stop Lamp Switch, (Speed Control, Brake Shift Interlock, ABS, PCM Module Inputs), GEM Module | 5 |
| 16 | Headlamps (Hi Beams), Cluster (Hi Beam Indicator) | 20 |
| 17 | Heated Mirrors, Heated Grid Switch Indicator | 10 |
| 18 | Instrument Illumination (Dimmer Switch Power) | 5 |
| 19 | Not Used | |
| 20 | Audio, Four Wheel Air Suspension (4WAS) Module, GEM Module | 5 |
| 21 | Starter Relay, Fuse 20 | 15 |
| 22 | Air Bag Module | 10 |
| 23 | Aux A/C, Heated Seats, Trailer Tow' Battery Charge, Turn/Hazard Flasher, Console Blower Door Actuator | 10 |
| 24 | Climate Mode Switch (Blower Relay), EATC (via fuse 7), EATC Blower Relay | 10 |
| 25 | 4 Wheel Anti-Lock Brake System (4WABS) Module | 5 |
| 26 | Right Side Low Beam Headlamp | 10 |
| 27 | Foglamp Relay and Foglamp Indicator | 5 |
| 28 | Left Side Low Beam Headlamp | 10 |
| 29 | Autolamp Module, Transmission Overdrive Control Switch | 5 |
| 30 | Passive Anti Theft Transceiver, Cluster, Ignition Coils, Powertrain Control Module Relay | 30 |
| 31 | Rear Integrated Control Panel (Audio), CD Player | 10 |
| Relay1 | Interior Lamp Relay | |
| Relay2 | Battery Saver Relay | |
| Relay3 | Rear Window Defroster Relay | |
| Relay4 | One Touch Down Window Relay | |
| Relay5 | ACC Delay Relay |
Power distribution box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Power Point | 25 |
| 2 | Powertrain Control Module | 30 |
| 3 | Headlamps/Autolamps | 30 |
| 4 | Console PowerPoint | 2 |
| 5 | Trailer Tow Backup/Park Lamps | 20 |
| 6 | Parklamps/Autolamps | 15 |
| 7 | Horn | 20 |
| 8 | Power Door Locks | 30 |
| 9 | Daytime Running Lamps (DRL), Fog Lamps | 15 |
| 10 | Fuel Pump | 20 |
| 11 | Alternator Field | 20 |
| 12 | Rear Wipers | 10 |
| 13 | Not Used | |
| 14 | Not Used | |
| 15 | Running Board Lamps | 10 |
| 16 | Not Used | |
| 17 | Not Used | |
| 18 | Powertrain Control Module, Fuel Injectors, Fuel Pump, Mass Air Flow Sensor | 15 |
| 19 | Trailer Tow Stop and Right Turn Lamp | 10 |
| 20 | Trailer Tow Stop and Left Turn Lamp | 10 |
| 21 | Not Used | |
| 22 | Not Used | |
| 23 | Powertrain Control Module, HEGO Sensors, Canister Vent | 15 |
| 24 | Powertrain C ontrol Module, Automatic Transmission, CMS Sensor | 15 |
| 101 | Trailer Tow Battery Charge | 30 |
| 102 | Four Wheel Antilock Brake Module | 50 |
| 103 | Junction Block Battery Feed | 50 |
| 104 | 4x4 Shift Motor & Clutch | 30 |
| 105 | Climate Control Front Blower | 40 |
| 106 | Not Used | |
| 107 | Not Used | |
| 108 | Trailer Tow Electric Brake | 30 |
| 109 | Air Suspension Compressor | 50 |
| 110 | Moonroof, Flip Windows and Heated Seats | 30 |
| 111 | Ignition Switch Battery Feed (Start Circuit) | 50 |
| 112 | Drivers Power Seat, Adjustable Pedals | 30 |
| 113 | Ignition Switch Battery Feed (Run and Accessoiy Circuits) | 50 |
| 114 | Climate Control Auxiliary Blower | 30 |
| 115 | Not Used | |
| 116 | Rear Window Defroster, Heated Mirrors | 40 |
| 117 | Not Used | |
| 118 | Not Used | |
| 201 | Trailer Tow Park Lamp Relay | |
| 202 | Front Wiper Run/Park Relay | |
| 203 | Trailer Tow Backup Lamp Relay | |
| 204 | A/C Clutch Relay | |
| 205 | Horn Relay | |
| 206 | Foglamp Relay | |
| 207 | Front Washer Pump Relay | |
| 208 | Rear Washer Pump Relay | |
| 209 | Front Wiper Hi/Lo Relay | |
| 210 | Not Used | |
| 211 | Not Used | |
| 212 | Rear Wiper Up Relay | |
| 213 | Rear Wiper Down Relay | |
| 301 | Fuel Pump Relay | |
| 302 | Trailer Tow Battery Charge Relay | |
| 303 | Not Used | |
| 304 | Powertrain Control Module Relay | |
| 401 | Not Used | |
| 501 | Powertrain Control Module Diode | |
| 502 | A/C Clutch Diode | |
| 503 | Not Used | |
| 601 | Delayed Accessory (Power Windows, Flip Windows, Moonroof) | 30 |
| 602 | 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.