I would take another look at the battery wiring. On the 14s-17s there is one positive wire that falls back behind the battery when removed that many forget..or just don't see. Some of your systems are being powered with the key off which means the key switch is being bypassed somehow. Was there ever a time when the key was on but the battery was dead and a jumper was used while the key was on? If so, look to burned internal contacts in the key switch.