I have a 2000 crown vic dimond edition . last week the fuel pump fuse blew while I was driving . I replaced an went along my way. 2 days ago I went out to go to work and it cranked but wouldn't start again, I went to change the fuse but it blew right away. I disconnected the battery an put another in. the second I reconnected the battery it blew. I swapped the A/d and fuel pump relay to see if it was that but same thing happen.
I unplugged what I think is the fuel pumps power supply . ( 2 prong connector under the fuel tank) and still blew.
I replaced the crank position senor a few weeks backs if that helps.