the wire could have had something to do with it. see that your running a/c volt wire. i had thaT problem once i came out in the morring and battires where dead. it was becuse of my starter being bad. i think, i got a new starter never had the problem again. i dont know if that was the real problem with my battire dieing it only happend that one time and i check twice there was nothing left on. most of the time and i say most cuz its not always true but battires usely die if there too old and cant take a charge anymore. or there is something draining on them. if there older they could just be bad and not take a charge there for they wont hold a charge but will read they did with the car running or a charger on them. i could be wrong, theres a good possibledy. i am wrong.