go to the junk yard and see if they have a gen 1 with the wiring harness still in it, if they do just chop off the connector leaving a few inches of wire and then re-wire it into your existing harness. the colors should all match and then you can just buy the plug in adapter to wire into the aftermarket stereos harness. when i was younger and dumber i had an 87 and wanted to put a radio in it, so i chopped off the factory plug real close to the end so i would have extra wire to work with, then i tried to wire it directly into the stereos harness. it took me 2 days to get it working, after having to learn how a test light works, removing all 4 speakers and checking the colors of the wires, then double checking the colors of the wires, then butt connecting everything only to run out of butt connectors and having to drive to the store with my stereo hanging out of the dash to get more butt connectors........ oh to be young and dumb again....