suddenly just died. getting spark and fuel.just changed cam sensor but nothing

How do u fix it??

TEST THE CIRCUIT AND ALL WIRING CONNECTIONS. ALSO POSS CAM SENSOR PICK UP MEY BE BAD

i put a light wire tester on the crank sensor wire and seems like there's no poss power coming. is there always suppose to be poss wire on every sensor? the timing is my last choice but i really dont thing its the timing