I was in an accident recently a head on type and now none of the electric stuff works? the airbags were deployed

 

Check the harness really well that happened to me once and I had 2 pinched wires right in front of the battery

 

nothing works? maybe check the PCM/engine grounds.

 

If the fuel pump runs 2 seconds when key is turned it means the PCM is semi alive, does security lite come on for 5 seconds and go off, does the starter crank over. What about interior lites, headlights, radio, brake lites. These are all different circuits that can help isolate the cause of problem. You may have pinched a wire the opened a fusable link on the 12V distribution terminal (pass wheel well).