I think the orange wire is the power wire, and I would try to find a power seat harness for this as using a bad connection can burn stuff out in a hurry. There is a reason it uses a fairly heavy gauge wire. Also, check your transmission ( the nylon plastic thing) to be sure it is not cracked. Most of them are, and finding a good one is difficult. The alternative is the 87-88 power track which uses 3 motors instead of the single motor and transmission configuration that earlier cars do.