I posted instructions for aftermarket stereo install October 14, 2011, 04:19:56 PM See the thread PLUGS???? for my instructions. I apparently am not the only one who got a car owned by somebody who couldn't figure out how to use adapter plugs and rewired the whole speaker system. In a nutshell, to avoid reinstalling speaker wires through the whole car, use wiring harness adapter "SCOSCHE BBFD02AB 1986-UP FORD Non Premium Sound/JBL Connector" to adapt to Premium sound with eq (I know it says non premium, but it worked in my 88 XR-7). You have to disconnect the plugs from the premium sound amp in the trunk to avoid shorting out the new stereo, so do that first! I posted replies to this thread that will cover how to hook up to a rewired speaker system and one that was not rewired. My instructions require removing the eq, but I think there is a way to keep it if you really want it. I'd just remove it, most newer stereos sound just as good or better without it. Quote Selected