To help others out that might have this problem since none helped me out with My Problem had to do it the hardway and take my van to a pro to have the Aftermarket Raido installed. And if you have the OEM eq and built in amp for a 87 ford areostar with the premium sound a Aftermarket radio will NOT work in it you have to rewire your wires to the speakers The back Four are connected together so make sure you have a good wattage radio. Hope this helps any others thinking the same thing or will be thinking about it down the road

well I got mine to work gfine I just didnt have the options in the back were pasengers could change the station or voulme or listen on head ohones those are the only things I lost

dvddmc