Don,
I'd love to help, give me a date. Depending when, I can commit for 2-3 days to help. I can bring all my relevant manuals to include A1 turret trouble shooting.
There is significant cable deterioration due to squirrels nibbling on the wiring harness in the turret.
Bloody squirrels, could be rats/mice too, not unusual, happened to a few tanks I served on but damage was limited to CVC's and the ballistic nylon gun shield inside.
Let me know what they want to do.