Burnt wire

ajarofclay said
What I was referring to is if you look at the middle schematic you can see where the J2 splits at whatever the Diamond w 3

The diamonds represent junctions - usually splices. Sometimes we'll find the junctions done at terminal instead - probably because production found it easier.
Older diagrams will show welded junctions as solid circles, and connectors as open circles.

So that is supposed to be a welded juntion - and it looks like that drawing is the instrument panel harness.
I think the artist labeled the segments backward from how they work. Seen this in a couple years.
See if on your diagram J2B - 12DBL is coming from the ignition switch.

ajarofclay said
That run becomes G5 which goes to the dash and 9 pin connector

Yes. I follow you. G = Gages.

ajarofclay said
THEN appears to go to a ground

I see why you think that. I remember that drawing being a little hard follow.
The G5 wire is connected to the "12 V" tracings on the circuit board (dashed lines)
Ground refers to the ground of the Instrument Voltage Limiter. The IVR has system power available at the bottom connection, ground on the left connection, and "5 V" output on the right connection to the board.