2018 F250 Lariat cc/sb fx4... I'm installing a Raxiom boost gauge that fits into the left driver vent. It came with zero instructions and the only instructions I can find online are for the F150...

Question
(1) I need to tap 12v+ and ground into my ob2 port. I believe it's the same pin #4 for ground and pin #16 for power correct?

(2) it has a dimmer wire which I would like to make function. Does anyone have a dimmer circuit diagram so I can see what wire I need to tap into so the gauge will dim when my interior lights dim?

(3) where can I access a good vacuum/boost line to tap into for the gauge assembly?

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