[bushjc]

Does anyone know of a way that I can tell what is draining the battery on my Deville? I have changed the battery twice (once with brand new battery) - Car will start up and run fine, but after I park it overnight, the next morning it will not start. After a quick jump, starts right up. I have checked to make sure the doors are closed, disconnected the radio, still can't find the drain. Any Ideas?

 

[Ranger]

Put a 12v test lamp in line between the negative battery cable and the battery terminal. A current draw will illuminate the light. Now start pulling fuses until it goes out. Then you'll know which component or circuit is the offender.