I'm going crazy over here trying to find info on the PCM and what all the pins are for, like specifically the EGR sensor?! I have the service manual, over 7000 pages, and I've looked up everything that could remotely give me an answer but there's nothing there. The manual gives nice diagrams of the components and the pins but I can't read that. The PCM has 3 clusters of wires so which one carries the EGR wire? and which pin is it? Does the service manual have a page where it explains how to read all that stuff? I know it thoroughly explains everything else even all the wiring diagrams but I can't find anything about how to read the pin diagrams, orange, black, gray and which is which going to and from the PCM.