...yep that's the trouble spot. Haven't actually determined the exact problem yet - I used a cable tie to secure the damaged bundle of wires while I was trouble-shooting and naturally that helped arrest the problem. So in typical bush- mechanic fashion I now consider the problem fixed
When I get more down time I will have to pull the ignition apart to investigate the real cause....In the mean time I will once again celebrate the seemingly endless repetoire of repairs afforded to us by cable ties