Here's a general guide, but proceed at your own risk:
Tools You'll Likely Need:
* New side mirror: Ensure you get the correct replacement for your vehicle's year and options (power/manual, heated, turn signal).
* Phillips head screwdriver (possibly other screwdrivers): Depending on the mirror's mounting.
* Small flathead screwdriver (possibly): May be needed to pry off trim pieces or clips.
* Panel removal tools (optional): These plastic tools help avoid scratching the trim.
* Electrical tape (if applicable): For securing wires if dealing with a power mirror.
Steps (General):
1. Disconnect the Battery (Important): This is crucial, especially if your mirror is power-adjustable or heated, to prevent electrical shorts.
2. Remove Interior Door Panel: This is often the most involved step. You'll likely need to:
* Remove the door handle bezel (usually involves unscrewing it).
* Remove any screws holding the door panel in place (these are often hidden under armrests, door pull handles, or other trim pieces).
* Carefully pry off the door panel using the flathead screwdriver (or plastic pry tools) working around the edges. Be gentle to avoid breaking the clips. The panel is usually held on by several plastic clips.
3. Locate the Mirror Mounting: Once the door panel is off, you'll see the mirror's mounting mechanism. This could involve:
* Screws: Several screws may be holding the mirror housing to the door.
* Clips: Some mirrors are clipped into place.
* A combination of both: This is common.
4. Disconnect Electrical Connectors (If Applicable): For power mirrors, carefully unplug the electrical connector(s) supplying power for adjustment, heating, and turn signals. Take pictures or make notes of the connector locations before disconnecting to ensure you reconnect them correctly.
5. Remove the Old Mirror: Carefully remove the screws or unclip the old mirror assembly. Be mindful of any fragile parts.
6. Install the New Mirror: Reverse the removal steps to install the new mirror. Make sure it's securely fastened.
7. Reconnect Electrical Connectors (If Applicable): Carefully reconnect the electrical connectors. Tape the connections securely to prevent them from coming loose.
8. Reinstall the Door Panel: Carefully snap the door panel back into place, ensuring all clips are engaged. Reattach any screws or trim pieces.
9. Reconnect the Battery: Reconnect the battery and test the new mirror for functionality (adjustment, heating, turn signals).
Important Considerations:
* Power Mirrors: Replacing a power mirror is more complex due to the electrical connections. If you're uncomfortable working with car electronics, seek professional help.
* Heated Mirrors: Ensure the replacement mirror has the same heating element capabilities as the original.
* Turn Signal Mirrors: These require careful handling of the turn signal bulb and wiring.
* Broken Clips: If you break any clips while removing the door panel, you might need replacements.
Again, this is a general guide. Consult your owner's manual or a repair manual specific to your 1997 Ford Expedition for detailed instructions and diagrams. If you are not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic.
