service manual for 86 f-700
I think a Ford service manual with the EVTM (wiring diagrams) would be your best bet.
Of course, they ain't cheap: 1986 FORD MEDIUM HEAVY DUTY TRUCK Shop Service Manual: eBay Motors (item 360269365650 end time Oct-02-10 12:49:19 PDT)
Not sure that covers the F700, but it should, might want to ask, and definitely look around eBay more to see if you can get it any cheaper.
Here is just one example I found while looking for one for my 94.
this one has a buy it now of $42.99
1985 Ford Med Heavy 600 - 8000 Truck Service Manual Set: eBay Motors (item 370435017457 end time Oct-20-10 08:19:48 PDT)
Keep looking and you might find one more complete or for less money. Many times the factory set is 3 or 4 books.





