I bought a factory (copy) CD service manual for my truck off of EBay for $5.00

It has all of the codes, pinpoint tests, part numbers, diagrams, wiring diagrams etc... for the truck. It has saved me hundreds if not thousands of dollars over the years. The 1998 one covers ALL Ford Trucks for that year.

If you wanna download a copy I can post it on Kazaa for you, let me know and I'll do it tonight.