2001 9-5 wagon won't start

[battlewagon]

I've got a 2001 aero wagon, I lent my car to my sister for a few days and apparently she ran out of gas. She filled it up and it started up after the second try.

She continued to drive it to work for another couple of days and then I went to pick it up, started just fine, I checked the oil and it was a quart low so I replaced it and I didn't drive it for another two days. The battery was dead. No problem , I jumped it and it was fine, drove it around, no hesitation or funny noises or anything. Another two days go by until I drive it again, I had to jump it again and this time It took almost a half an hour to start, it still didn't seem to have any issues, I drove it around for an hour and then went to the gym, when I came out an hour later I had to call my wife to come get me, we jumped it yet again and got it home and I went out to buy a new battery.

Well, now it won't even turn over. There's a low battery light(even with a brand new battery), the oil light(even with topped off oil) and the central warning light is on, but nothing shows up on the SID. I checked all the fuses in the door, I checked the battery connectors, and after some reading I tried to move the shifter(auto) around then start it, and tried to start it in neutral in case it was that neutral position switch.

Nothing.

The main difference i see between my problem and others is that it's not intermittent, unless the battery wasn't bad in the first place. I have never had any other major issues with the car in 135000 miles, the weather here is 70 or so so it's not cold/hot related.

Any thoughts?

thanks.

[Jeff_Wolf]

If she ran it completely out of gas I would check the fuel filter as there could have been something in the very bottom of the gas tank that would obstruct fuel flow.

As for the battery... It seems like you have some serious electrical issues. I'm no expert in that area, I would try turning the cabin switch to off as well as as turning the light switch to in between regular headlights and parking lights. It will sit there with the right touch and will not connect the circuit for either set of lights thus cutting power to both.
Put a charger on both batteries. Make sure they are not the problem by testing them in something else. My guess would a there is a short somewhere in the system.

Check the oil level as you would do normally just to make sure and under the car to check for leaks. Once you find the culprit of the electrical problem you then need to move on to why the car will not start.