How do you reset the alarm for key pad on door a 2004 ford expedition?

There's no keypad alarm on a 2004 Ford Expedition. Ford Expeditions from that year use a standard key fob remote to lock/unlock and activate the alarm system. There is no keypad entry system built into the factory design. If you have a keypad, it's an aftermarket addition.

To reset an aftermarket keypad alarm, you'll need to consult the instructions that came with the system. The reset procedure varies greatly depending on the brand and model of the aftermarket alarm. Look for a small sticker on the keypad itself, or search online for the make and model number of the alarm system.