Hello,
I joined this forum because I am having a problem with my battery going dead in my 92 Mazda 626. I will drive it for a week or two, and then for no apparent reason I will get into it one morning and it won't start. I will jump it and it will run for another week or so, and then again it goes dead--doesn't even try to crank, and it always happens on a cold Minnesota morning when I am already late for work. I bought another battery, the Mazda killed that one too. I took it into the shop, they tested both the batteries, the alternator, starter, and tested it to see if they could find a paracitic drain--all tested out fine. They thought it was maybe a bad connection to the battery cables, so they replaced the cables and connections, 10 days later or so, did it again. I pulled down my seats to see if the trunk light was staying on, it isn't. With this issue reoccuring, I am now paranoid of leaving any lights on in the vehicle, so it is not that either. The only real pattern that I can see is that it always happens when I leave it overnight.
Does anyone have any ideas or suggestions as what this could be?