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You will need a bit more than a few diagrams
Google: EVTM 2001 E150
And, EVTM 2004 Ranger
EVTM is electric vacuum troubleshooting manual
This was part of the shop manual set sent out to all Ford Dealer shops every year for every model of Ford that year
It will have every wire and connection listed and where it is for that model, that year, covers all engine/transmission options and other options, along with revisions, so it is Year specific
These are usually sold separately from shop manual sets
People buy them and then sell them when they no longer have that vehicle, so they are available
You will need to swap out the Ranger 2004 instrument cluster with a 2003 or older, and probably the Smart Junction Box(cab fuse box)
The 2004 and up Rangers went full digital on cab electrics, so not great for swaps, in my opinion you would be better off putting in another 2.3l duratec engine, so keep it stock.