Your fuses are located in on the top of the page and you follow the wires down the page. The 5amp goes to the ECM, I believe it tells the ECM that the ignition switch is in the on position. The 10amp goes to the injectors and the other side of the injectors go to the ECM, I believe the ECM applies a ground to the injectors when it wants them to supply fuel. Okay, WAY to deep on theory. ;-)