In my 89 Buick Park Ave. I install a new battery.I had the charging system tested...

[Candyman]

...regulated,alternator and? battery load and everything was OK.If I don't start my car up in four or five day the battery will go dead.What kind of test could I do to see what is till pulling the juice from the battery

 

[Merlin]

Is there a light that is staying on ?

 

[pacemaker]

check if your trunk light , hood light is stuck on