Since it's the holiday season and your heart is in the right place, I hate to be the Grinch (but I will, anyway).
First off, you didn't identify the year of the truck in question. There are several different variations in anti-theft (includingPATS) that have been used depending on the model year.
We'll start with that.
I am curious as to where you saw that regarding the passenger door as it is improbable. Can you provide a link?
If your original owner's manual is missing, download a soft copy from www.fleet.ford.com
under the MAINTENANCE tab.
1989 Taurus SHO What a project! Retired at 249K.
1997 Ford F150 SC 5.4L - Gone
1995 Mustang GT Convertible, only 68K miles.
1998 Ford Contour Wifey's old daily driver, now mine.
2001 F250 SD, 6.8L, 4 X4.
2007 Mercury Mariner AWD - Wifey's new daily driver