1991 Buick Regal Battery Keeps Dying

Hi there,

You need to do a current draw test, place an Amp meter between the battery pos & the cable, check with key out & doors closed, check current draw, if above about.2 amps start pulling fuses and check for which circuit is drawing, also disconnect the alternator as well as a faulty diode will cause this without affecting the charge rate to much, start here.

Mark (mhpautos)