Barracuda died on lift at exhaust shop.
No 12v at yellow ignition wire.
Because of that ^^^ the next two dont get power. They need the yellow wire to get power first.*
I also have no power to my NSS and ignition terminals on the relay.
I have no power from the relay lug to my starter cylinoid when I turn the key.
Fusible link and all glass fuses not broken though.
Confirm pass through voltage to the ammeter and fuse block! Some lights should work if power is passing the fusible link.
I have voltage to all terminals on the bulkhead connector containing the fusible link, but no voltage to the other bulkhead connector containing the ignition wire.
Feel the fusible link to make sure there the wire inside is intact.
Even better, see if the interior lights, brake lights and headlights work. Just because there is voltage doesn't mean there is a
good connection. It just means there is a connection. Watch the ammeter as you turn each light on.
Should ignition be protected or am I incorrect?
It's not really protected. Protection is fusible link and the key switch. The fusible link is 16 ga so that's not going to protect the small wires downstream like those the ignition and field.
One you've verifified power is flowing to the lights, and not flowing with the lights off, next thing to investigate is why the yellow start wire is not getting voltage with the key in start. With key in run or accessory, turn signals, wipers, or heater fan should work.
I'd suggest at this stage, unhook the battery and put it on slow charge.
Hunt the break in the connection using yout ohmeter or continuity tester.
*If it helps, I posted an illustrated description of the start sequence
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