I printed out the wiring diagram for 1227747 ecu but i am confused on what pins get constant voltage and what gets switched. The injectors get switched. The fuel pump relay is switched. Does the ecu send out power to apply the fuel pump relay? I believe pins b1 and c16 have constant 12v. Basically i just need to know what pins get power and when. Sorry for my noobishness. On the plus side i have the fuseblock relays and wiring harness in the truck.