I actually had the same issue only reversed. I got a complete setup for an 89 and had to buy a harness for my 93. So I have an 89 harness if you are interested in it. I would make you a good a deal. It does not have the supplemental harness.Just curious since I see a 1993 complete unit for sale but I want to put one it a 1989. Will the harness work or is it not worth the hassle?