While I was changing the oil in my friend's 2003 Ford Expedition, I
took the opportunity to create a guide for replacing any of the bulbs
(low beam, high beam, & parking / turn signal) in the headlight
It should be the same procedure for any 2003 to 2006 Expedition.
Here's the page -
I hope someone finds it to be useful.
Ft. Lauderdale, FL