John have to got a multimeter handy. If so, I would check continuity within the heashell and then the arm. At least this way you can work out exactly exactly where the fault is. I think it is unlikely that the arm wiring is at fault. It is more probably the headshell wiring, or an issue with the connectors.
Okay, and of course you are right. When I get a peaceful mement I'll unpack two full boxes of unpacked hifi 'suff' including a multimeter (and my cleaning tools - IC spring cleaning
Will revert asap.
Thanks for the shove, Reese.