Chrysler Repair: 97 Intrepid: No Start, theft security, code numbers

Question
My car, 97 Intrepid, 3.5L Engine. 3 days before, my car do not start. I turned the key, but no spark. I check the light inside the car, it seems that the car still have power. I disconnected the cable of the battery, and lock all the door of my car and wait about 20 minutes. I connected the cable, and turned on the key, the car started. I drove a while and turn it off. I tried to turned it on, it did not start again. I had to disconnect the battery again. Next morning, I connected the cable and it starts. It works for two days, and I found that the order of the auto-door-lock it wrong. Whenever I start the car, the central-lock lock right away, whenever I turn off the car, the central-lock un-lock right away. Today, the car do no start again, and I try the same way which I do before, but it do not works. What happen on this car, please help me figure out the problem. Also, I will try to find a code reader to scan the computer of the car. Thanks a lot.

Answer
Hi Frank,
When you say it won't start, do you mean that it won't catch and run at all, or does it catch and run for 2-3 seconds and then shut down?
I am wondering if this problem is related to the vehicle theft security system or just related to the ignition/fuel system so your answer would help me to know.
I do agree that doing a code readout via the plug under the dash by the steering column is a good idea. Let me know what 4-digit fault code numbers you notice.
Roland