Originally Posted by cgalpin
It's possible the cable is no longer working of course. But it would be good if you could try it on another 14cux truck and if that doesn't work, either investigate or send it back to me. Any disco 1 should be a prime candidate.
Your cable is put together correctly, not sure why I can't get characters to show up in PuTTY after reprogramming the chip to normal polarity on the RXD line.