There used to be a Haynes edition that covered Ford trucks and Broncos from 73-80, but it has changed twice in the 11+ years I have had my Bronco. I recently had to buy another. There were two of them at the Autozone I went to...they both had identical blue covers (my 10 yr old one had a brown cover) one looked thicker, so I checked both the thicker one had the wiring diagrams for each year, the newest edition did not cover the WD for all the yrs. Needless to say, I bought the one with the WD. Pepboys, Vatozon, Advance Auto, NAPA will all have alot of these, if they dont have it in stock, look around at another store or have them order it. The info is pretty good in there...and I have been able to figure out most things from the ones I have had over the years. Good luck.