I despise Haynes manuals, way too incomplete. One too many times have I found them listing the instructions for taking something apart, but lacking the torque specs for putting it back together; missing information of that nature. The wiring diagrams are at best wrong and at worst missing entirely certain years, models, or particular circuits. I'll never buy another one.
Interestingly, both of the Bronco II's I've bought have come with used Haynes manuals that the owner didn't want anymore. Probably because they weren't RBV enthusiasts, but I always keep my manuals if they're worth keeping. In this case I'll send them on with the trucks if/when I sell.