Well a 1999 Gems 4.0s. My Autozone Duralast yellow top battery (8 months old) has been dying at least once every 3 weeks to the point that starter motor nolonger turns. Couple of days ago I changed the battery to one of their Platinum series (AGM) one and that one died almost a day after and then again today. I started looking closely in to whats going on and found the Negative wire that connects to the Alternator bracket was hanging loose. I may have forgotten to connect it after doing the heads. I'm thinking this is the culprit that is causing the battery to not charge. Can't tell for sure till I recharge the battery again.
Even tho the battery is not completely dead (lights work, no dimming of dash lights, Battery voltage around 12.8v) what causes the car not to turn the starter even when using my Duracell Orange starter pack nor trying to jump start it. I noticed that before it died the other day, the starter would turn and the engine won't start as if there is no spark.
Once the Baterry is charged all is back to normal.
Is this the work of the BCM to shut the system off when there is no sufficient charge from the battery? Including been able to jump start?
If the old yellow top to took 3 weeks to discharge and the new AGM one only takes a day, will I be better off with the old baterry?
Again, I'm hoping that the issue was with the ground and all be sorted once the battery is charged.
At the same time, just want to overcome that helpless feeling of being stranded in 100f+ temps.