wire colors

I have had issues with the truck running right. I have replaced fuel pump, gas pedal position senser, throttle body, and a few other sensers. I believe it is the PCM but want to check the to make sure I'm getting the signal from the gas pedal position senser to the PCM, and the PCM to the throttle body. Can you tell me the wire colors that I need to look for at all four locations and the voltage on them? Thank you