Why does my battery die as soon as I connect it?
My daughter was driving, dash lights flashed, all lights went out, car died, battery dead. After fully charging, it dies on connection - ignition off.
You may have a major short between the two battery terminals - clearly something fried and is creating a short. Check battery cables for continuity and shorts.
Could be a bad battery, just won't hold any load.
After charging the battery again, I noticed while on the charger, the green light came on saying it was fully charged, but every few seconds now it's dropping back to 75% on the gauge, It's going back and forth now. Could this mean a short in the battery?
Yep, your charger should start off with almost full charge then slowly drop off to around 1.5 amps and stabilize there, it should not switch up and down. I would replace the battery.
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