Ignotion switch

Any idea how I can tell if my ignition switch is bad. I have a spare ignition switch, but how can I tell if my exhisting one is bad. I’m going to be installing a new starter in my car today.

Swap the ignition its literally 2 plugs just unplug it from.under dash and.plug in new one and try it before u unbolt ur old one

What are the symptoms? Why do you think it’s bad in the first place?

OK but when I swap the ignition everything plus in except this black rectangualr peice… cant figure out what it plugs into… last time I installed the switch I didnt plug it to anything and it worked fine.

Hmmm, what black rectangular piece? 94