This was what I found after I started having engine problems shortly after my swap. The fuzzy picture is a cheap speaker wire someone used as a patch. Not only was it the cheapest of wire you could imagine, but the copper was corroded from one end to the other. All the dark area inside the insulation and also on the center area of the crimp is corrosion. The wire was corroded enough that the corrosion bled thru the crimp. The wire spliced in looked like it sat in the bottom of a damp trunk for sometime BEFORE it was used.
The other problems I had with almost every crimp the person made was that they didn't trim the insulation back far enough on just about any of the crimps. I had a few crimps that came apart in my hands while trying to test and adjust my TPS.
This is my replacement of the bad TPS. I swapped some from an N/A bracket to a turbo bracket and went over all the splices with solder.