03 5.3 ignition schematic?

[LSXmyford]

we still have a no start condition

anyone have a 03 5.3 engine wiring schematic, specifically ignition related? coil packs area?

engine cranks
fuel injectors/fuel pump work fine, has pressure
still getting no fire and this is pcm number two (VATS supposed to be removed)
crank and cam sensor are new
getting no codes

guess we should start at the coils and work backwards until things operate correctly.

Only test performed at this time was to remove the four wire pigtail from the coil packs, turn key to "run" position. one wire shown 12v, one shown to be a good ground, other two received no positive voltage nor were they grounds.

we understand one or two have to be signal wires so this is expected, my question, how do we test those two wires, or should I say, what should be seen at each of those four wires and when? Im guessing an intermittent signal should be receive to either or both, so a simple test light should flash if the starter is engaged, no?

thanks, this is getting a wee bit frustrating.