Where the Fuses Actually Are
The 2005 Ford Expedition has two separate fuse areas, and most people only look in one of them when something dies. The first one is the Integrated Power Module behind the glove box on the passenger side. You have to pull the cover off and unclip a few panels to reach it. The second is under the dash on the driver's side near the steering column. Both have covers you remove by hand—no tools required. A fuse box diagram is simply a map showing which fuse controls which circuit. The problem is that not all 2005 Expeditions came with the same equipment. A four-wheel-drive model has different fuse assignments than a two-wheel-drive. Options like the towing package, heated seats, or trailer brake controller each add their own circuits. This means a generic diagram you find online might not match your exact truck. When I was troubleshooting a no-crank condition on a friend's 2005 Expedition last fall, I pulled the owner's manual and found the interior fuse panel diagram printed on the back of the kick panel cover. That was the only reliable reference in the vehicle. Everything else required cross-referencing three different online sources because the manual alone didn't cover the Integrated Power Module in detail.
Integrated Power Module Layout
This is the large black box behind the glove compartment. It handles all the high-current circuits: starter, fuel pump, ABS, A/C compressor clutch, and the main power feeds to the interior fuse panel. The fuses here are standard automotive blade type, and the relays are press-in type that can be pulled straight out with your fingers or needle-nose pliers. Common fuse and relay positions in the IPM: Fuse F114 — 40A — Main power feed from battery
Fuse F120 — 30A — Fuel pump and inertial fuel cutoff relay
Fuse F122 — 20A — A/C clutch relay
Fuse F126 — 25A — Transmission control module
Relay R113 — Starter relay
Relay R114 — Fuel pump relay
Relay R116 — A/C clutch relay
Relay R124 — Horn relay
Relay R125 — High beam relay
The labels on the IPM cover itself are embossed into the plastic. Over twenty years they wear smooth. I've had to read them by holding a flashlight at a shallow angle and feeling the grooves with my fingernail to figure out which circuit was which. If yours is that worn, tracing wires is the only fallback.
Get the Full Details
Interior Fuse Panel Layout
Located on the lower left dash near the parking brake. This panel handles lighting, accessories, and body control circuits. The cover has a printed diagram on the inside surface. Again, this fades over time, especially in direct sunlight. Typical interior fuse assignments: Fuse F1 — 10A — Instrument cluster
Fuse F2 — 10A — Turn signals
Fuse F3 — 20A — Headlights
Fuse F4 — 15A — Radio and information center
Fuse F5 — 10A — Trailer brake connector
Fuse F7 — 15A — Power windows
Fuse F9 — 20A — Blower motor
Fuse F10 — 20A — Wiper system
Fuse F12 — 15A — Heated seats (if equipped)
Fuse F13 — 10A — Rear wiper
Fuse F14 — 15A — Power door locks
Fuse F16 — 20A — Tow mirror circuit
Fuse F17 — 10A — Air bag system
If your vehicle has the optional trailer tow package, you'll also see additional fuses and relays dedicated to the trailer brake controller and auxiliary power outputs. These are usually labeled differently than the standard ones.
The One Issue Nobody Warns You About
The IPM has a known failure point that isn't related to any fuse at all. The ground strap that connects the module to the chassis passes through a spade connector near the parked brake position sensor on the driver's side frame rail. If that connector gets loose or corroded, every circuit in the IPM loses its ground reference. You'll see intermittent failures that come and go when you bounce the truck over bumps. I ran into this exact problem on my own 2005 Expedition. The headlight relay would drop out randomly, causing the headlights to flicker while driving. I replaced three relays and two fuses before I finally traced the intermittent short back to the ground strap. Cleaning the connector with contact cleaner and tightening the bolt fixed it permanently. If you're chasing a ghost fault in the IPM circuits, check that ground first before you throw parts at it.
Getting an Actual Diagram
The most reliable source is the vehicle's owner's manual. The factory service manual from Ford is more detailed but costs money and takes time to track down. Aftermarket manuals like Chilton or Haynes cover this generation and include full diagrams. Online, you'll find scans of the original diagrams on forums like Expedition Forum and FordExpedition.net, but always verify the diagram against your actual vehicle because trim-level differences matter. What I recommend: Take a photo of your fuse panel cover before you remove it. Then compare any diagram you find online to your photo. If the fuse positions don't match, the diagram is wrong for your vehicle. This alone has saved me from swapping fuses based on incorrect information at least twice.
Using the Diagram in Practice
When a circuit dies, the first step is always visual inspection. Pull the suspect fuse and hold it up to the light. A blown fuse has a visible break in the metal element inside the plastic. Some are subtle and you have to angle it properly to see it. If you don't have a fuse puller tool, a pair of needle-nose pliers works fine. Just be careful not to damage the fuse box contacts while removing it. Once you replace a fuse and the new one blows immediately, stop. That tells you there's a short circuit downstream, not a simple overload. Pushing more fuses into the slot won't fix it and might damage wiring. The short could be in the component itself, in a wire harness, or in a connector that's gotten wet. I've seen moisture from a leaking windshield seal cause exactly this problem by sitting in a connector behind the dash.
What This Approach Doesn't Do Well
Fuse diagrams are static documents. They don't tell you about wiring variations between production runs. Ford made mid-year changes sometimes, and a 2005 built in March might have different fuse assignments than one built in September. There's no universal way to know your exact build date without checking the VIN on Ford's parts website or in the service manual. If precision matters for your repair, this is worth factoring in. Another limitation: the diagrams list circuits by name, but they don't tell you where those circuits physically go. If your tail light fuse is blown, the diagram says "tail light circuit" but doesn't tell you whether to check the connector at the rear light assembly, the wiring harness along the liftgate hinge, or the ground point near the spare tire well. For that you need a wiring schematic, which is a different document altogether and much harder to find in readable condition. The biggest practical limitation is that fuses are cheap insurance, not diagnostics. Replacing a blown fuse without finding the root cause just repeats the failure. The diagram gets you to the right fuse quickly. It doesn't get you to the answer.
