DMOSS69

I Have 2005 4.3 Chevy Silverado I'm not getting 12 volts at my crankshaft & camshaft position sensor . Original problem was crank no start. That's what left me to check wiring and found there was no power at either sensor nor was I getting fire at plugs. I've been over all the wiring and relays along with the grounds..when I test pcm 1 fuse 15a with the light hooked to battery ground it's making the fuel pump relay click...any help would b greatly appreciated