I installed an aftermarket radio with ac control knobs and i have gone over all of the wiring. nothing is un-plugged. there was one black wire (coming from the new kit) with a tiny metal prong that i couldn't figure where to plug in so i put electric tape over it. if i remember correctly the ac worked fine at first but now the air is only coming from the defroster up top. i read a similar thread [ http://www.taurusclub.com/forum/82-maintenance-repair/110160-only-defrost-works.html] <---- here.. which vacuum lines were they referring to and which plug. some pics would really help.