Turn signals not working, blowing fuse

I don't know that the actual diagrams are wrong. I think the main AFU was that chart listing the fuses.

If you have a printer I would print out..........

The figure before the diagrams start which pictures the bulkead connector and it's circuits
The diagram pages, this is so you can hold them side by side and more easily follow conductors
The pertinant pages on past the diagrams which show the connector diagrams.

Also somewhere in the beginning, before the wiring diagrams, should be a chart showing what the various wire alpha codes mean, like J for ignition, etc.

I do not generally like the 73/ later style of diagrams, much harder to follow, sometimes. The newer stuff in the late 90's and later is much worse. I have an 04 GMC and detest trying to follow the shop manuals.