Ignition switch because ignition circuit was not engaging; the coils were not receiving power, and the idiot lights were not coming on (starting is a separate part of the ignition circuit). On the pre-mass airflow systems ('92 and earlier), starting ether goes a long way in testing if the ignition circuit is energized (EZ does it, or you'll start the car on fire), but so does a voltmeter or scope. On a post-'92 with MAF sensor, if your blower motor doesn't engage and your fuel pump doesn't cycle, ignition switch is a likely culprit

__________________
Don't ask me, I'm a shop-owner by default