I changed my fuel pump and car still wont start, cranks but wont turn over, why? on 1999 Cadillac DeVille

While driving to work about a week ago my fuel gauge started to rise and drop and the car cut off, I originally thought I was out of gas so put gas in and after a couple times of turning over the car started back up. two days ago the car shut off while driving again and would not restart I changed the fuel pump and car still wont start and now i here a clicking noise that comes from under the car near the pump as well as under the hood near the fuse panel when car is not started and i dont even have key in ignition. why? some one help please?????

1 answer
start with basics. fuel pressure check, spark test and compression.

one of them will be missing and then we can zero in on the failure.

Roy