If I were you I would get the part number off the wiring harness, take it to the dealer and ask them whether it's original or a replacement - because if it's original it's shot, and if it's a replacement it should be fine. No need to do this if you can see crumbling insulation - just replace it. The part number is near the source plug by the battery. You may have to unplug it to find it. I tried repair but it lasted for only a few weeks. It fails first nearest to heat sources but once it's failing there it's suspect just about everywhere - and it's gotta go.