These wires from the factory wiring harness had been fairly oxidized. Cleaning them with the Dremel #530 wheel makes them clean enough for re-termination and creates a good, clean, copper to copper connection. The #530 SS wheel is stiff enough to get into the inner stranding, not just the outer strands. Occasionally you need to manually open or fan the strands out but it takes just a few seconds per wire, that's it. Be sure to get all copper stranding as clean as possible or just replace the wires.


Once clean I use adhesive lined heat shrink crimp on ring terminals. This keeps moisture out and creates a sealed connection.


In a perfect world every one of these wire would be replaced with new but not all owners can afford that. Cleaning and re-terminating can be a reasonable alternative.