Having an issue with the ladies WJ.. We just replaced the battery. I think Advance tested it to have something around 9 volts after we had starting issues, so we replaced it. It didn't have any issues for the following day, and then last night after driving around for a while we stopped for a bite to eat. We sat in the Jeep for maybe 3 minutes with the overhead lights on and everything else off, and when I attempted to start it, I got nothing. I can hear what sounds to be the gauges attempting to make a clicking noise, but other than that, nothing. Headlights, power windows, power door locks, etc... none of it works. We called AAA and got a jump start to get it home. Turned it off and attempted to restart and again, nothing.
There's nothing that I can think of that should be causing a significant parasitic power loss. It does have an aftermarket headunit in it (and did when we bought it) but nothing has changed. Other than that, there's really nothing else that's not stock about the WJ. There's a little bit of corrosion on the battery cable which I will address, but what in the world could be causing this?
Initially, we had this problem a few nights ago before replacing the battery. It wouldn't start, so for some reason I turned the headlights on to see if they had power, turned them back off, turned the key, and voila! It started. That doesn't work now. lol!