2004 yukon starter/ignition/wiring issues

[mikemhp]

that was one of the first things i replaced.... can it be tested?
right now i have disconnected power from all the stereo amps, no fuses blown at all, battery has been on charger for 2 hours, reading 12.6, all lights, a/c, dash lights come on like normal, but no crank, no click, no start at all....

only thing i have disconnected was the power to the amps
still getting batt drain from somewhere

 

[mikemhp]

UPDATE (again).... saw a video how to crank engine by jumping #30 and #87 terminals on starter relay... engine cranks over right away... thinking there is a 'starter interrupt' or similar somewhere on the alarm system i never knew was installed on the truck..

batt holding charge with these fuses removed-

 

[mikemhp]

swapped out ignition switch with another new one, batt light still comes on on dash.
only goes out when i pull both IGN A and IGN B fuses.
still no crank, no start.

at a loss here........... any ideas?

neutral safety switch maybe?