odd no start 96 LHS

OK A 96 LHS 3.5 died while driving checked it out no spark and no injector pulse-have power to coil and injectors form ASD relay just no ground-all of the ignition and injector drivers (ground signal)are IN the pcm -have good ground out of pcm on terminals 47,50,10 -so my thought was replace
pcm did that still nothing all i get is 1 or 2 sec of spark and injector activity
while cranking then it stops-never losing power from the ASD relay-so i threw a few parts at it just for fun-crank sensor-cam sensor-checked timing -
I think I have checked the wiring pretty good might have over looked somthing but don'tknow what would cut ground like that if the cam or crank senors act up the pcm cuts power through the ASD relay right? HELP IF YOU CAN

The very last thing that it could be (Even checking for fuel pressure at the rail front, right) would be that your timing belt broke. If it did, it would disable the crank sensor. Have a look into.

Good luck!