1997 Pontiac Bonneville Battery keeps dying

1997 PONTIAC BONNEVILLE
137,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
SAVAGE_973
  • MEMBER
  • 1 POST
brand new battery in car and every morning i need a jump to start the car
Apr 30, 2009 at 1:50 PM
Advertisement
Avatar
ZACKMAN
  • CERTIFIED EXPERT
  • 4,202 POSTS
You have a circuit that keeps draining the battery (power draw).

You will need a digital voltmeter, a notepad and a pen to start with. You need to start with a fully-charged battery (not charged by the alternator, but an external battery charger). Record battery voltage prior to installing the battery in the vehicle. Install battery terminals. Record voltage. There should be some drop in voltage.

Now remove one fuse at a time and check the voltage, and then put the fuse back in. You need to keep a good record on which fuse and voltage increase (if any), and what the fuse controls.

Once finished, whichever fuse that you see a voltage increase is where you want to concentrate in looking for the power draw.
May 11, 2009 at 12:04 AM