Expert: autohelp - 7/22/2009

Question
My battery dies overnight, I have replace the battery and alternator and the problem still occurs. IT's been doing it every night for about 2 weeks. I also notice that the inside light doesnt work anymore, and the doors don't lock anymore since the this started. What can it be. I own a 2003 cadillac cts the problems with the battery didnt start until i got valve cover put on and a sensor. Then 3 days later that when the battery started going dead overnight or if the car sits more than 6 hours

Answer
A normal battery when sitting for any length of time draws 1/2 amp of voltage from the battery.

What you need to do is to take the vehicle down to an Auto Zone parts store and ask them to perform an amperagedraw test on your battery of which they will do for free.

Ask them how many amps is being drawn out of the battery and let me know.