1998 Other Mitsubishi Models battery repeatedly dying

1998 MITSUBISHI
143,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
BRADY HILL
  • MEMBER
  • 1 POST
battery has been checked and shows to be good. alternator also checks out okay; both checks through auto zone & advance.

however, the battery continues to go dead and requires a new battery repeatedly and cannot be driven at night at all.

have also taken the hot battery cable off to see if the car would go dead and it did not go dead.

what could possibly be the problem?

thanks for your insight (mitsubishi mirage)
Dec 22, 2007 at 8:27 PM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

it sounds like you have a current draw problem. Remove battery Pos (+) and fit an Amp meter between terminal & cable, with key out and doors closed, there should only be about .2Amps max showing, any more and there is a problem some where, If draw is present remove main Alternator cable, if draw drops to normal level, you have a leaking Diode in the alternator , (this won't show up on a charge test) If alt OK, start to pull fuses untill you isolate the problem circute.

Mark (mhpautos)
Dec 22, 2007 at 8:40 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.