Since I'm on vacation, 750 miles away from my car, I spent today colorizing my scans of the Haynes 1975 current flow diagram. I'm glad I did -it turns out it is different than the 1974 (especially the headlight wiring). I could never find color 1975 diagrams on the web anywhere, so these are presented under copyright "fair use" terms - the originals are still copyright by Haynes, of course. The images are somewhat useless without the original manual, since I did not upload the page with the key.
I may replace these with further cleaned-up PDFs some day. But I'm not in a hurry :-)
Edit: After McMark at 914world.com kindly stitched these together, I found a bug in pages 3 and 4. So, these are the new pages 3 and 4.