The Ford factory manuals are now out of print but some of the manuals for the identical Mazda T Series are still available.
For the WG series T series Mazda made available two separate volumes when the model was introduced in 1989.Volume 1 covered the engines for the T2600, T3000, T35000 and T4000.Volume 2 covered the chassis.Wiring diagrams were available in a separate manual.Mazda then produced supplement manuals for changes made in 1992, 1993 and 1995, including updated wiring diagram manuals.Unfortunately, many of the books in the set are no longer in print so a complete set for your model may not be possible.The Computer Outpost
PO Box 87
Hazelbrook NSW 2779, Australia