So i am having one hell of a problem and i can't seem to figure it out...

i realized that I've been upgrading a lot of parts and have yet to put in new plugs and couldn't remember when the last ones were changed. so i went a got new set of ngk iridium gapped them to .030 and swapped out old ones. no big deal.
however....
now my car won't start. won't even crank. starter doesn't do anything. i turn the key and power comes on lights work speakers and sub work fine. battery voltage is just under 12v try and start it and i get nothing.
now before i put plugs in i started and drove car into flat area today. so i know it can't be the starter.
thought maybe it was the plugs, so i took new ones out and put olds back in. still nothing. has this happened to anyone before?
does anyone have any suggestions or any mobile electric mechanics to recommend because i am completely stumped and have been tearing out my hair for the past 4 hrs trying to figure it out.

im in liliha if anyone would be willing to take a look id appreciate it...

 

well i figured it out...

i had to put key in ignition in order for alarm not to go off when i put battery back in however i never deactivated it so it wouldn't allow car to start... figured it had to be something stupid.

now i know. least i didn't get a mechanic to come look at it, and it was a cheap lesson. time consuming... but cheap.