2005 Dodge Grand Caravan latches & locks problems

We own a 2005 dodge grand caravan with no automatic back door. After purchasing it in nov 2004 and upon periodic operation of the door, my back started getting sore and painful. One day in feb of 2005 after closing the back door manually within 2 days I reached over for an apple that fell on the floor and fell to the floor in terrible pain and had to be rushed to the doctor. I still have problems until this day and now have protruding disks in my lower back.

We just purchased a 2005 dodge grand caravan yesterday and did not discover until we got home that the power locks do not work. We feel this is a safety issue especially with our two small children in the vehicle. It is unsettling to think that someone dangerous could attempt jump into the van at any time the vehicle is stopped and not be able to quickly hit the button and protect our family. It is also easier to forget to lock all the doors after exiting the vehicle, which makes us more prone to theft.