Starting to wire and ave a few questions

[Iceburgh]

1st.... Does the PCM need a oil pressure reading? The gauges I got have to use the sending unit supplied. If the PCM needs one as well how is the best way to do both?

2. I am using a haywire kit for the truck.... I assume the ECM just gets a few power leads from the Haywire kit?

most look to be plug and play but not sure of all...can anyone make sense of the wires posted?
I did not get anything with the PCM/motor/trans but shown a video of it running so I know it does


these are coming out of the PCM
that don't have connectors on them


3 does the OBDII only have 4 wires? Will that give me readings I need and tuning capabilities ( not me but someone who knows what they are doing)