Do I understand you do not get 12 volts for one second at any injector or the coil pack after turning on the ignition switch? If that is right, try it with a test light instead of a voltmeter. Many digital voltmeters don't respond fast enough to catch that short blip but you will see it with a test light.
If you still don't see the 12 volts, remove the relay and test for 12 volts on the automatic shutdown relay's socket. There must be voltage all the time on either terminal 30 or 87. Sorry, I can never remember which one. If neither one has voltage, a fuse is blown. The most common cause is a wiring harness to the oxygen sensor fell down onto hot exhaust parts and a wire melted through the insulation and shorted to ground.
If you do find 12 volts, either the relay is defective, the Engine Computer isn't turning it on, or your test probe isn't making good contact where you're measuring. Switch the relay with another one like it such as the AC compressor relay, or put your fingertip on it to feel if it clicks when a helper turns on the ignition switch.
Monday, October 29th, 2012 AT 8:40 PM