Like other said, start with the basics:
1) Make sure the fuse is good. A lot of times the fuse is kaput.
2) Make sure your connections are correct. (A slim chance you got a dead pump)
3) Make sure you don't have air in the system. This can cause the pump to cavitate (not flow)
If none of that is your issue, then it might be your temp sensor. Have Autozone read your codes. There should be a "soft code" in memory if you have a sensor failing.