2000 Saturn Other Ls Service Light Wrench On Car Wont Start Replace Starter

I have a 2000 ls the service light with the wrench is on and car wont start replace starter still wouldnt start juggle wires car starter put old starter back on car ran good for one week now same thing happenedd again. Replaced starter again car cranked, drove car to the store no problems get to work no car wont crank any ideas what may be causing. When i stick the key in the ignition i gets nothing all the lights on dash come on.