94 buick lesaber ac compressor problem! PLEASE HELP!!!!!!!!!?

i bought the car and i was told it needed a new accumulator..so i replaced that and charged the system..come to find out the ac compressor wasnt even plugged in..so i found the plug(it was blue) and plugged it in and it dident work still...so i unplugged it and but my test light to the plug and it wasnt getting power..so i jacked the car up and followed the ac wires and i found a red plug hanging down there.i put my test light on that and it only gets power when the ac is switched on..but i cannot for the life of me find were this red plug goes...then there is two other wires comming out of the same spool of wires.. one goes into one of the metal pipes eather high or low i cant really tell..and when i unplug that both fans spin like crazy even with the ac off..then the last small little wire goes off to what looks to be a o2 sensor but i coundent seem to get it unplugged and it felt a bit flimsy...but my main concern is where the heck does that red plug go??? can anyone help please im in south florida and its steaming hot my newborn son is sweating when we go out.....thanks god bless