I just recently put a new full harness in the 77 I'm trying to put back on the road.
I can tell you when was taking the old harness out, there was over 10 places I counted where the
Wire coatings were gone and the copper wires were touching.
Had I put a battery in it, the harness probably would have fried.
Most of the connectors were brittle and crumbled as well.
So it's possible it's grounding a hot wire somewhere as well.
I had to undo a bolt on my coils to remove a ground wire that has an eyelet on it from the harness.
Not certain without looking back at the schematic, but I think the coils ground to the frame where they
mount Under the center frame under the fuel tank
I would look up the wiring from the fuse In the schematic and see what it feeds power to.
There is wiring schematics directly above your post in this section with the manuals.
A ton of info there
