Dredging up an oldie, but thought I would document my install for any other XLT owners who tackle this.
First, TXFRDOwner was, by far, the best resource I had for this project.
I bought both mirrors and the Dorman switch from an ebay seller for $300 shipped. The mirrors are power fold/heat/puddle/turn with no memory function.
I HIGHLY recommend buying the pigtail connectors for the switch and mirror connector.WPT998 and WPT1152 are needed. You'll also need a release tool.
These allow you to use the connectors with factory terminals. If you have access to the Ford terminals, use those.
The factory relay is a must, for ease-of-install.
Also handy (for me) was a spool of 18awg 5-wire.
XLT trucks will not have any of the required wires pre-run. You'll need to run 5 wires through the boot on the drivers side, and 4 on the passenger side. Also, you'll need to make a ground in each door at pin 8 on the mirror harness. I used one of the mounting bolts as a ground.
The puddle lights in these aftermarket mirrors are 194 bulbs, and they pop out easily -- so you can put LED lights in those very easily.
Tapping the illumination wire is already documented in the How To section, use that.
I'll put some pictures up on tapping the turn signals later.
I mounted the relay/controller module next to the fuse block, passenger kick panel. It made more sense to me, since I had to pick up power there anyhow, and a good ground is easily accessible. There is enough wiring in the drivers kickpanel area already, plus you're tapping illumination and signals over there.
Whole project should run you about $500 or less. The pigtail harnesses are spendy, so if you can source the terminals and crimp them down yourself, you can save $60 easily. I also bought a new spool of 5-wire, so if you have that already there's $20 off too.
07 XLT 2WD Flareside
4wd strut/shock swap w/ Bilsteins | Center console swap | HID retrofit | Morimoto fogs | Depo LED tails | 09 badges | 4wd tow hooks | Tailgate handle rear camera | Total Interior/Exterior LED conversion | Edge Programmer | FX4 Cluster swap | DIY Power Folding Mirrors | Clazzio covers w/ heat | Lund Tri-Fold Cover