i am trying to find out which wires go to the O2 sensors on my truck from the pcm . If i could find a pin diagram of the module i would be in buisness.. but i don't know where to even keep looking.. at least not free and online...can anyone help me. .. i boaught a Hayes manuel.. but it does not help alot.. it tells me what the wire colors are.. but there are three pin blocks in the pcm and i am not sure which set is the correct block