power issues help
 

I have a 2001 chrysler/dodge intrepid 2.7 about 160 000 km*
I drove my car to work stopped it for 5 mins then tried to start it again and it wouldnt. It was making a clicking sound behind the dash. I waited for the clicking sound to stop and tried again and it started. This would happen for 2 days when ever i did a stop engine to ignite within a short time. (The ticking only happened the first time) then one time it wouldnt start at all. I got a jump start. Was able to drive home which is a 10 min drive and when reversing into my drive way everything died. Everytime i jump start, it lasts 15 mins and dies. Lights flickering inside and outside. I changed the alternator. Had to get another jumpstart. Car lasts 30 mins then dies. This time the battery light was on. I go and get a new battery. Open the door and my cab lights are bright again try to start. It clicks once like it should then all my lights die and instruments dies and it wont start. When i open the door my km guage and the light for the seat belt are on and flickering really fast. When i try to use my autolocks they clicck sound really fast without working. When i try to start now nothing happens but my oil light comes on. Dont know whats wrong*

Checking for a short would be my first thing. If you have a voltmeter (if you don't, should get one) set it to ohms to test the Resistance. Pull the fuses and inside the hole (where the fuses plug into) put the prongs inside (red on one side, black on the other). The voltmeter should read 0.1 or perfect resistance. Meaning the wires create a closed circuit. If they don't, most likely that's your issue.

But let's for a moment here assume there's an issue with your battery. Once the car is started, the car doesn't need the battery. The alternator should be running the car. So I know you said you've already replaced it, but honestly, that seems like the most likely culprit.