I recommend this, the Haynes was enough to get me started, but the 2003 factory manual I picked up gave me the backup to do a bunch of transmission work recently.On Ebay are two FORD OEM manuals, the service manual and the wiring manual, both together for $60.00 for your 2003
I like simplified even though I just bought 2 factory manuals off eBay. I missed out on a Haynes Manual for $5.00..........crap.........thanks for the recommendation......Actually get both, Why?
The Haynes manual may have a simplified writeup to do something OR a shortcut
The first time you do ANYTHING yourself-- the manuals are paid for.
The Haynes gives a simplified wiring diagram that is more easily understood but is LESS precise as it cannot include wiring diagrams for all the years and there are subtle wiring difference between the years.
The Ford wiring manual is precise and tells everything