2002 Cadillac Deville
 

I'm having a dead short somewhere in the electrical system. The battery is good. It's completely dead from sitting overnight, but still, startable in a five hour period.
Any assistance with this problem would be much appreciated. TIA.

Leaving the key in the switch even though is off will drain the battery.

My car 2002 Cadillac wont start battery everything works. When i go to crank it over it wont turn on it goes completely dead !