E825 short when ignition turned on

ok, I am stumped. our e825 has been trouble free for a couple of years and suddenly we get an alarm and the car shuts down. no power to anything and when you turn it on, the ignition switch wires get hot. have tried changing the controller, put in a new 72 to 12 converter checked all battery connections and all of the crappy original gem wiring harness connectors. Any other ideas?