1993 Buick Century car cranks but wont start

The car was running fine until I tried to hook up some gauges, oil pressure and coolant temp, when I removed the oil pressure sensor I twisted and broke the lead wire to that sensor but spliced it back together, then I removed the coolant temp sensor and replaced both with the new gauges, tried to start the car but it only cranked didn't start. So I reversed everything I just done,
still no start only crank, sprayed starter fluid into manifold
it fired up and then died, check fuel pump to see if it was running when I turned on the key, no sound fuel pump not turning on, so checked the relay fuses under hood 1 was burned so I switched it with 1 not burned just like it still no start just crank, checked the fuel rail to injectors and it has fuel to it.
i'm stumped have never had any problem adding gauges before to any other car or truck but have only
owned fords this is my first buick. Help Please.
Gerald