99 se

I just got used Winstar 99 SE no problems But I decide to changed the Batttery after that the Door ajar keeps popping need any advice to find solution Because I notice Now everytime I started the engine the doors
didn't automatically lock down now..?

Spray some WD40 in the door latch. Or replace the latch. Something about a ball bearing inside the switch gets caught up. I'm pretty sure that you can find out which one is sticking by closing the doors (I think with the car on) and manually locking them, the one that is sticking will unlock thinking the door is still open. Mine was the drivers side.