no headlights and selector will not work

ok so this is kind of a long story. one day i was like " lets remove the icu cause of it not working". well i started to and it was to much of a pain so i just put every thing back to wear it was(or what i thought).when putting it back together i put a 4 pin plug wear the ingnition switch go’s. car was all weird so i finnaly caught it. i put every thing back and now my corners,fogs,and headlights will not turn on(my tail lights work)
next i find out that the selector in the cabin ti change it to feet or vents will not work now. i have no idea what happened and im about to just remove the whole dash and just go over everything. can someone help me figure out what i did wrong!!!help!!